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Sluicing and Fragment Answers

A fragment answer supplies the required information in a short phrase: In the garden, Twelve, Priya’s. It can be communicatively complete without a spoken subject and verb. Context helps recover the meaning; check the form, the accuracy of the answer and the degree of certainty.

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Fragment answers: a short phrase as a complete reply

The intuition: a fragment conveys a whole message, even in one word

Half past three is a natural, sufficient reply to When does the meeting start? The full sentence The meeting starts at half past three helps explain its meaning. Some theories analyse the fragment in terms of an unspoken clause, while others analyse it differently. Learners do not need to treat one account as the only possible analysis.

Both a short and a full answer can be natural. A fragment is convenient in a quick exchange; a full sentence can provide clarification, contrast or clarity. Length alone does not determine irritation or formality.

This lesson covers fragment answers to wh-questions. They differ from sluicing, where the short wh-phrase itself asks a question. The wider theory of fragments also covers other types of utterance.

How to build it

wh-question + [recoverable clause] → fragment = the requested information, with the rest unspoken

clause
—
A construction with a verb, often with its own subject: when I arrived. A non-finite clause may leave the subject unspoken: to get home.

"Where's Noah?" "In the garden."

"Where's Noah?" "In the garden."

In the garden means Noah is in the garden. The subject and verb can be recovered from the question.

"How many people came?" "Twelve."

"How many people came?" "Twelve."

Twelve supplies the meaning Twelve people came. There is no need to repeat people.

The right amount: supply the information requested

The wh-question identifies what information is sought: a person, thing, place, time, reason, manner or quantity. Give enough for the particular situation and add clarification if needed. There is no compulsory requirement to answer with exactly one constituent.

The form should show the intended relationship. For Whose idea was this?, the direct standard answer Priya’s marks possession. Simply saying Priya may be understandable in context, but it does not reproduce the possessive pattern practised here.

The full answer Mira called may also be appropriate. It is not automatically redundant: the speaker may be clarifying the event or emphasizing the person responsible.

"Whose idea was this?" "Priya's."

"Whose idea was this?" "Priya's."

Priya’s explicitly marks possession: Priya’s idea is understood. The name Priya alone can identify the owner in context too, but the example demonstrates the possessive form.

"How many pages did she write?" "Nine."

"How many pages did she write?" "Nine."

The number alone is enough; pages has already appeared in the question.

Prepositional connectivity: omission is possible, substitution is not arbitrary

English allows a preposition to be stranded at the end of a question: Who did you talk to? A fragment answer reflects that pattern. The preposition can be spoken with the fragment, To Mira., or omitted when the construction permits it, Mira. Both are grammatical; they differ in explicitness and register.

Accounts of fragment answers in preposition-stranding languages support this. English, unlike languages that require the preposition to move with the question phrase, can naturally allow a fragment without the preposition.

If the preposition is spoken, it must express the right relationship: to the shops marks a destination; about the deadline marks the subject of worry. However, The deadline alone is natural after What’s Dan worried about? Do not confuse omission in a fragment with removing about from the full sentence Dan is worried about the deadline.

"Where are you going?" "To the shops." / "The shops."

"Where are you going?" "To the shops." / "The shops."

Both answers are natural. To is optional in this fragment, but cannot simply be replaced with a preposition expressing a different relationship.

"What’s Dan worried about?" "About the deadline." / "The deadline."

"What’s Dan worried about?" "About the deadline." / "The deadline."

Both answers are natural because the question already establishes worried about. A full sentence needs about, but a fragment can leave it unspoken.

Case connectivity: pronoun forms and their role

For a direct object in a neutral standard answer, use the object form: Who did Mary see? — Him. The full paraphrase Mary saw him shows the relationship. Quotation, contrast and differing theoretical analyses should not be reduced to a claim of no exceptions in every register.

Subject questions behave differently. A bare fragment without a verb naturally takes an object form in neutral conversational English too: Who saw John? — Him., much like Who’s there? — Me! The subject form appears naturally when the reply retains a verb: He did. Both patterns are documented, and neither should be declared the only correct option.

Names and full noun phrases have no he/him contrast and can directly identify a participant: Mira, the finance director. Choose them when they are clearer, without assuming they are always more frequent than pronoun answers.

"Who did Mira call?" "Him."

"Who did Mira call?" "Him."

The person is the object of call. Him, not he, is the neutral standard fragment here.

"Who called Mira?" "He did." / "Him."

“Who called Mira?” “He did.” / “Him.” Both identify the caller; Him. is the conversational bare fragment.

The question asks for the subject. Both answer patterns are documented as natural; neither is incorrect in itself.

A fragment with an additional comment

You can add a comment on the source or your certainty: apparently, I think, probably, allegedly. These expressions do not answer who or when, but they affect the strength of the message. If they matter to the meaning, do not remove them merely to shorten the reply.

The comment can follow or precede the fragment: The finance director, apparently; I think Thursday. Punctuation depends on the construction. The same assessment can also be expressed in a full answer.

In The finance director, apparently, the person’s title answers who. Apparently may point to other people’s reports or available indications while leaving room for doubt. It does not always mean only heard but not checked.

"Who authorised this expenditure?" "The finance director, apparently."

"Who authorised this expenditure?" "The finance director, apparently."

Apparently comments on the speaker’s information source rather than supplying the person requested by the question.

"When's the delivery?" "Tomorrow, I think."

"When's the delivery?" "Tomorrow, I think."

I think likewise stands apart from the fragment tomorrow.

A fragment answer is not sluicing or a yes/no short answer

Sluicing leaves a wh-word in place of a whole question that has not been asked in full: Someone cancelled the meeting. Who? Here Who? is the question, or an echo of one, not the answer.

A fragment answer instead occupies the ANSWER side of an already asked wh-question. It supplies the missing information rather than asking for it with a wh-word. A clarifying echo question functions more like sluicing than an answer.

A short yes/no answer, such as Yes, I am. or No, she doesn’t., is a third construction. It uses a matching subject and auxiliary to confirm or deny the proposition, rather than fill a wh-gap with new information.

"Someone cancelled the meeting." "Who?"

"Someone cancelled the meeting." "Who?"

Sluicing: a follow-up question, not an answer.

"Who cancelled the meeting?" "Dan." (not "Did Dan cancel it?" "Yes, he did.")

“Who cancelled the meeting?” “Dan.” Compare the different yes/no exchange “Did Dan cancel it?” “Yes, he did.”

The fragment answer identifies a person; the yes/no short answer confirms the proposition.

A full sentence is correct too: contrast, formality and focus

A full sentence is correct and can be appropriate even for a simple factual question. Compare clarity and the desired emphasis rather than calling it redundant based on length alone.

A full sentence may be useful for correcting an assumption or making a contrast; sometimes a stressed name is enough. Context, intonation and the listener’s needs determine the choice.

Repeated full sentences in a quick informal exchange can sound stiff or even evasive, while excessive shortening in an official report or email can sound too abrupt. Choosing the form manages register and attention; it is not a simple pass/fail test.

"When does the meeting start?" "The meeting starts at half past three in the afternoon."

"When does the meeting start?" "The meeting starts at half past three in the afternoon."

The full answer adds in the afternoon. If that is already clear, a shorter answer is possible; both forms are grammatical.

"Did Priya approve this, or did Noah?" "Noah approved it."

"Did Priya approve this, or did Noah?" "Noah approved it."

Noah approved it explicitly names the performer and the action. Noah alone also naturally distinguishes between the two candidates.

Common mistakes

Incorrect:"Who did the manager promote?" "She."

Correct:"Who did the manager promote?" "Her."

Promote is transitive, and the pronoun occupies the object position. Use her, not she, just as in The manager promoted her.

Incorrect:"Where are you going?" "At the shops."

Correct:"Where are you going?" "To the shops."

For this destination meaning, go takes to, not at. The fragment preserves the required relationship rather than allowing any spatial preposition.

Incorrect:"Whose signature is missing?" "Her’s."

Correct:"Whose signature is missing?" "Hers."

The possessive pronoun hers has no apostrophe and stands for her signature.

Incorrect:"Who saw John first?" "Him did."

Correct:"Who saw John first?" "He did."

In the standard clause with did, the subject form is he: He did. Him on its own, without did, is possible as a conversational fragment, but that is a different construction.

Incorrect:"Where should I sign?" "On."

Correct:"Where should I sign?" "On the last page."

On requires its own complement here. A bare preposition without a noun phrase does not identify the place or complete this fragment.

Sources

Sprouting: sluicing without an explicit correlate

The basic idea: a question without an explicit counterpart in the first clause

In sluicing with an explicit correlate, someone, something or somewhere already names an indefinite participant or circumstance. In sprouting, no corresponding element is expressed. The wh-expression asks about a parameter understood from the event. This may be a verb argument or an adjunct.

Compare He’s meeting someone, but I don’t know who, where someone is explicit and who refers back to it, with He’s writing, but I don’t know what. Nothing in he’s writing names what is being written. What “sprouts” from the fact that write normally permits an object.

The term sprouting describes the absence of an explicit correlate for the relevant wh-phrase. A full paraphrase helps check the intended question. You do not need to adopt a particular theory of unspoken structure to use the pattern.

How to build it

event without an explicit counterpart for the missing detail + know / say / tell … + wh-phrase

He's writing, but I don't know what.

He's writing, but I don't know what.

What has no expressed correlate in he’s writing. The object is fully implicit and recoverable from the meaning of write.

She donated generously last year, though she won't say how much.

She donated generously last year, though she won't say how much.

The first clause contains no phrase naming an amount. How much is recoverable because donating involves an amount.

2. Check what the question is asking

An object question with what needs an action that permits that kind of object, such as write, eat or design. The first clause must also sound natural without its object. A dictionary label such as transitive does not guarantee every possible shortened construction.

Sleep has no ordinary direct object comparable to a written text. Without extra context, He was sleeping…, but I don’t know what therefore does not create the intended object question. However, why, where, how long or how much can relate to sleep. Intransitivity does not ban sprouting altogether.

Check the full paraphrase together with the context. Changing the verb may change the available question type, but a transitivity label alone is not an automatic test.

He was writing all morning, but I have no idea what.

He was writing all morning, but I have no idea what.

What asks about the written content. Writing appears without an object, and the action’s meaning makes the missing detail recoverable.

The committee is reviewing, but nobody will say what.

The committee is reviewing, but nobody will say what.

Review permits an object, review something. No object is expressed in the first clause, allowing the shortened what question.

Types of sprouting: object, recipient, source and amount

Different kinds of arguments can be recovered according to the verb: a direct object with what, a recipient or destination with to whom, a source with from whom, or an amount or degree with how much. The intended role determines the wh-phrase’s form.

When there is no explicit prepositional correlate, retaining the preposition is especially important: write a letter … to whom; borrow money … from whom. The possibility of leaving a preposition at the end of a full question does not itself permit dropping it from a short sprouting question.

In some short conversational questions, the preposition can follow the wh-word, as in who with, but it is still spoken. Do not confuse that reordering with leaving the preposition inside the omitted clause. Clear, reliable patterns here include to whom, from whom and for how much.

He wrote a letter, but I don't know to whom.

He wrote a letter, but I don't know to whom.

The direct object a letter is explicit. The recipient is not named and is recovered through to whom.

She borrowed money, but nobody knows from whom.

She borrowed money, but nobody knows from whom.

Borrow involves a source. From whom asks about it even though no source phrase appears in the first clause.

4. One component is explicit; another is unexpressed

A sentence can name the item while leaving its recipient, source or price unexpressed. A letter, the car or money does not block a question about another missing detail. These details are not all analysed as two direct objects of the verb.

The explicit argument, such as a letter or money, is not itself the correlate for a wh-remnant referring to a different role. To whom does not refer to a letter. These are distinct argument positions, not the same one shortened a second time.

That is the contrast with sluicing that has an explicit correlate: there the wh-word corresponds to visible wording; here it corresponds to an unexpressed role associated with the same event.

She sold the car, but I don't know for how much.

She sold the car, but I don't know for how much.

The car explicitly names the sold item. Its price is unexpressed and is queried through for how much.

He owes money, but I don't know to whom.

He owes money, but I don't know to whom.

Money identifies what is owed, but not an exact amount. To whom asks about the unnamed creditor.

Sprouting and ordinary sluicing: the same remnant, different conditions

In the simplest comparison, explicit something provides a correlate for what. Without it, the meaning of what is recovered from the event and context. Both cases involve sluicing; sprouting names the subtype without an explicit correlate.

The surface form of the shortened question can be identical. The distinction lies in the presence or absence of an explicit counterpart in the first clause. Understanding that boundary is an advanced C2 skill rather than merely memorising the form.

She's buying something, but I don't know what.

She's buying something, but I don't know what.

Sluicing with an explicit correlate: what corresponds directly to the already stated indefinite something.

She's buying, but I don't know what.

She’s buying, but I don’t know what. The first clause does not explicitly state an object.

Sprouting: the same remnant what now has no explicit correlate. The object of buy is entirely implicit.

Boundaries: arguments and adjuncts

Adjunct questions with why, when and how can ask about an event’s reason, time or manner without an explicit correlate. These can also count as sprouting. Object what requires a different check: what thing or content does the particular verb permit?

Some apparently intransitive uses still retain an implicit argument. Eat or drink without an object still implies food or drink, so what can be recovered after them too.

With sleep, how much can refer to the amount of sleep: He slept, but I don’t know how much. How long asks more clearly about duration. The lack of an ordinary direct-object what question does not rule out every question about amount or time.

They were eating, but I couldn't tell what.

They were eating, but I couldn't tell what.

Eat can appear without an object while still implying food. The implicit object can be queried with what.

He collapsed, but the report doesn't explain why.

He collapsed, but the report doesn't explain why.

Why asks about a reason, which can be associated with an event such as intransitive collapse. It does not test whether the verb takes a direct object.

Using sprouting: register and naturalness

Sprouting is familiar and natural in everyday speech and writing, especially with verbs of communication, creation and exchange such as write, cook, pay, donate and borrow, when a detail is unimportant or unknown to the speaker.

Excessive reduction where a verb genuinely does not license the intended argument sounds broken rather than economical. C2 control involves knowing which relationships the verb permits.

A full version with the argument expressed, such as I don’t know what he was writing, remains available and may be clearer. Sprouting is a stylistic option based on real structural conditions, not an obligatory shortening.

The lab is testing, but the memo doesn't say what.

The lab is testing, but the memo doesn't say what.

A natural, economical formulation. The fuller what the lab is testing is also correct and may sound more explicit or formal.

I know she's been designing, but she won't tell anyone what — not even her business partner.

I know she's been designing, but she won't tell anyone what — not even her business partner.

Sprouting remains natural inside a longer sentence. The added material does not require the object to be named in the first clause.

Common mistakes

Incorrect:He was sleeping all morning, but I have no idea what.

Correct:He was writing all morning, but I have no idea what.

Without additional context, what does not identify an ordinary object of sleep. The writing version describes a different event with an available object. It demonstrates a contrast rather than preserving the original fact about sleeping.

Incorrect:He arrived, but nobody knows what.

Correct:He arrived, but nobody knows when.

In its ordinary meaning, arrive supplies no direct object for what. When creates a clear question about arrival time. This can also be sprouting if no explicit time correlate is present.

Incorrect:He was designing, but nobody knows what was he designing.

Correct:He was designing, but nobody knows what.

After knows, the full embedded question is what he was designing, without inversion. It can be shortened to what. The correctly formed full version is also acceptable. Sluicing retains the wh-phrase rather than deleting it with the rest of the clause.

Incorrect:He sold the car, but I don't know for how many.

Correct:He sold the car, but I don't know for how much.

The price is an amount of money, treated as uncountable, so use how much rather than how many.

Incorrect:She borrowed money, but nobody knows of whom.

Correct:She borrowed money, but nobody knows from whom.

Borrow introduces the source with from, not of. The sprouted prepositional phrase retains the preposition appropriate to the verb.

Sources

Sluicing: a wh-remnant instead of repeating the question

Intuition: the question remains even though the clause is not pronounced

A specific information gap often arises after a statement. In Someone called, but I do not know who, the final who does not name a person; it asks a dependent question about that person. The full paraphrase who called helps show the meaning, but the form actually used ends with the wh-remnant.

The same mechanism works as a separate utterance: Someone called. — Who? Here, intonation and context give a single remnant the force of a direct question. After I do not know who, the whole sentence is a statement about not knowing, containing a short question within it.

The term sluicing belongs to grammatical analysis. For learning purposes, it is enough to check whether there is a wh-question, whether the context allows its subject matter to be recovered, and whether the unpronounced part is unnecessary for distinguishing several possible meanings.

How to build it

context with an open detail + (a know / say / explain frame, etc.) + wh-phrase [the interrogative clause is not pronounced]

clause
—
A construction with a verb, often with its own subject: when I arrived. A non-finite clause may leave the subject unspoken: to get home.

Someone has taken the spare key, but nobody knows who.

Someone took the spare key, but nobody knows who.

Who is the remnant of a question about the agent; the indefinite someone provides an explicit correlate.

The server stopped responding, but we cannot explain why.

The server stopped responding, but we cannot explain why.

The reason is pragmatically recovered from the event, although there is no separate something.

The remnant is a wh-phrase, not necessarily a single word

The remnants can be who, what, when, where, why, and how, but also which report, which of the three, whose proposal, how many applications, how much longer, with whom, and more complex wh-phrases. It is not everything after the first wh-word that is omitted: words that refine the question itself belong to the remnant.

A noun or determiner is often needed for clarity. After A researcher from one university published in one journal, the phrase which one could refer either to the university or to the journal. Which journal or in which journal removes the competition between correlates.

Semantic labels overlap. Which of the three expresses both a choice and a quantitatively restricted set; whose report asks about possession while identifying an item. A teaching category names the focus of a particular exercise; it does not deny other properties.

Several recommendations were adopted, but the minutes do not say which ones.

Several recommendations were adopted, but the minutes do not say which ones.

Which ones preserves the plural number of recommendations.

The review found a fault, but it is unclear how serious.

The review found a fault, but it is unclear how serious.

How serious is the entire gradable wh-phrase; the full paraphrase ends with the fault is.

Recoverability: the context must provide enough information, but not the answer itself

The listener needs to understand which event or relation is being questioned. An explicit indefinite correlate—someone, something, somewhere, one of the reports—makes the connection transparent, but it is not an absolute requirement.

The event itself can open up a natural parameter: The lights went out, but nobody knows why. The reason is not named or presented as something, yet the question “why the lights went out” is easy to recover. In the specialist literature, this related subtype is often described as sprouting; it remains a useful example of a general wh-remnant.

Recoverability does not automatically select a wh-word. The plan changed allows relevant questions such as why, when, how, or in what way, depending on the purpose. A closed exercise can have one answer key only when the visible context specifies the required parameter.

The courier stopped somewhere nearby, but the app does not show where.

The courier stopped somewhere nearby, but the app does not show where.

Somewhere explicitly directs where toward the place of stopping.

The final briefing ended abruptly, but nobody could explain why.

The final briefing ended abruptly, but nobody could explain why.

The question about the reason is recovered from the event without an explicit indefinite noun.

Root and embedded questions use different frames

A separate full question usually has question word order: Where did they put the key? Its shortened dialogue counterpart is Where? The auxiliary did does not remain stranded after the wh-phrase.

After frames such as know, wonder, remember, say, explain, and be clear, a full embedded question has subject → verb order: I wonder where they put the key; nobody explained why the system failed. The forms where did they put and why did the system fail are not appropriate inside such frames.

In the sluice itself, the difference is not always visible because only the wh-phrase is pronounced. That is why expanding it is a useful check: for the standalone Who?, the natural full paraphrase is Who called?, while for I do not know who, it is I do not know who called or who they called, depending on the required role.

A: They stored the archive somewhere. B: Where?

— They stored the archive somewhere. — Where?

A root sluice is a separate direct question.

They stored the archive somewhere, but I do not remember where.

They stored the archive somewhere, but I do not remember where.

Where is part of an embedded question after remember; the whole sentence does not require a question mark.

Grammatical connections and register do not disappear

The form of the wh-phrase depends on the role it would have in the full question. After of, the pronoun must have the object form them: which of them, not which of they. Countable plural nouns combine with how many; uncountable nouns combine with how much.

In English, a preposition can remain together with the wh-phrase or be unexpressed in a short version when that full question is natural. Peter spoke with someone, but I do not know with whom is more formal; ... but I do not know who is common in many conversational contexts. With who also occurs in informal usage. A difference in register should not automatically be called a grammatical error.

Whom marks the object role in more formal style; who is also widely used in the object role. Before a preposition, standard formal to whom / with whom is especially noticeable. When an exercise requires a particular register, it should state this explicitly.

The analyst consulted with someone, but the report does not state with whom.

The analyst consulted with someone, but the report does not state with whom.

With whom explicitly preserves the preposition in a formal register.

Mina spoke to someone after the talk. — Who?

Mina spoke to someone after the talk. — Who?

Informal who is natural as a short question about the object; whom is possible in more formal usage.

Economy is optional, and pragmatic conclusions are limited

The full I do not know why she left and the shortened I do not know why are both grammatical. Sluicing often avoids repetition and makes the wording lighter, but the full form may be appropriate for clarity, contrast, or rhythm. Therefore, “not shortened” is a failure to meet the goal of a particular exercise, not automatically a language error.

I cannot remember when, the report does not say which, and the editor would not disclose who distinguish the holder of knowledge from the availability of information. The report does not say does not imply that the authors do not know; would not disclose does not imply that the information does not exist.

A wh-remnant does not establish a specific answer, time, reason, or agent. It preserves the question. Likewise, may, might, negation, and temporal relations in the context must not be unjustifiably strengthened during shortening.

She resigned, but the announcement does not say why.

She resigned, but the announcement does not say why.

The gap concerns the wording of the announcement, not necessarily the knowledge of all the participants.

She resigned, but the announcement does not say why she resigned.

She resigned, but the announcement does not say why she resigned.

The full form is grammatical and conveys the same basic question; it simply does not use sluicing.

Theory and usage: a useful paraphrase without excessive certainty

An influential structural theory analyzes sluicing as a wh-phrase together with an unpronounced clause and explains why the remnant preserves the grammatical connections of the full question. At the same time, both structural and nonstructural approaches exist in the literature; the detailed nature of the unpronounced material is a theoretical question.

For a learner, full expansion is a practical diagnostic tool: it checks the role of the wh-phrase, tense, modality, and word order. But a formula such as who called should be called a full paraphrase, not the only proven representation in the speaker’s mind.

Several adjacent wh-remnants have variable and often marginal acceptability in English. If Who what? or who whom sounds unnatural, a clear full clause or coordination of two questions is better than maximum shortening. At C2 level, control here means knowing not only how to elide, but also when to avoid over-reduction.

Everyone submitted something, but I cannot reliably tell you who submitted what.

Everyone submitted something, but I cannot reliably tell you who submitted what.

The full form avoids the potentially marginal double remnant who what.

They moved the meeting, but I do not know when or why.

They moved the meeting, but I do not know when or why.

Two coordinated questions are clearer than an artificial sequence of several wh-words.

Common mistakes

Incorrect:The panel rejected the proposal, but nobody explained why did the panel reject it.

Correct:The panel rejected the proposal, but nobody explained why the panel rejected it.

After explained, this is an embedded question, so the subject comes before the verb; inversion with did is ungrammatical here.

Incorrect:Three proposals remain, but the board has not decided which of they.

Correct:Three proposals remain, but the board has not decided which of them.

After the preposition of, the pronoun must have the object form them, even when the rest of the question is not pronounced.

Incorrect:We need more equipment, but nobody can say how many.

Correct:We need more equipment, but nobody can say how much.

Equipment is uncountable in this meaning, so the quantity remnant agrees as how much.

Incorrect:The guard could not remember when had the visitors arrived.

Correct:The guard could not remember when the visitors had arrived.

A full embedded question after remember does not have inversion; the Past Perfect is preserved nonetheless.

Sources
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