Clausal Ellipsis

She earns more than he earns is grammatical. The verb phrase can be shortened further: She earns more than he does. The rule therefore does not require every repeated verb to be removed.

The compared degree or quantity inside the than-clause is a different matter. In an ordinary comparison, we do not repeat more there as part of another identical comparison. Two facts—she knows a lot; they know less—do not mechanically produce than they know more….

In theoretical grammar, comparative deletion refers to omitting the compared component; additional verb-phrase ellipsis is a separate process. This distinction helps avoid treating every long than-clause as incorrect.

For an ordinary lexical verb in the Present Simple, use do or does; in the Past Simple, use did. Make the remaining auxiliary agree with the subject and tense of the second clause itself.

If the second clause needs be, perfect auxiliary have, or a modal verb, retain the appropriate form. Do not replace every predicate with a universal do. Longer verb sequences sometimes allow different degrees of shortening if the required meaning remains clear.

Shorten repeated material, but retain what is contrasted: a participant, period, place, object, or modality. When comparing the present with the past, a remaining did or was often makes the time difference clearer.

Do not automatically carry a negative from the first clause into the second. Not as much as means a smaller quantity, not necessarily none at all. Do not turn a smaller amount into zero or inequality into equality.

When the second clause has an expressed finite verb, its subject takes the form he, she, I, we, or they: than he does, than I am. Him cannot fill this subject role before does.

Without an expressed verb, both than he and than him are possible. A subject-form pronoun without a verb sounds more formal or literary; an object-form pronoun is common in everyday language. Than he does is often a useful neutral way to make the structure explicit.

Do not label an object-form pronoun after than an error merely because you can mentally add a verb. A full subordinate clause and a short than-construction need not have the same structure.

In I trust Maya more than Leo, the short remnant Leo can be a second person doing the trusting or a second object of my trust. If the context does not resolve this, expand the part that makes the role clear.

Him does not guarantee a single interpretation either. In an ordinary conversational comparison, it can identify the person whose action is being compared, but after a transitive verb it can also be read as another object. In an important message, clarity matters more than minimum length.

When different properties or things are compared, the second component can be new information: height versus width, complaints versus thanks. Removing it changes the meaning.

In a special contrastive context, emphatic repetition of the same property is also possible. Neutral practice should therefore avoid rules such as adjectives are always forbidden after than. Detailed theoretical analysis of these constructions is unnecessary for ordinary editing.

Contractions in writing create a separate boundary: do not leave a final I'm instead of I am before an omitted predicative component. This is not a ban on all apostrophes: negative forms such as didn't are possible in the appropriate context.

First identify both sides and the feature being compared. Then check which words can be recovered without guesswork. Choose between a fuller clause, a remaining auxiliary, and a short noun phrase.

Finally, reread from the recipient's perspective: has the time reference changed, is the agent clear, and has a new object disappeared? A complex contrast may require more words. The goal is a clear comparison, not the shortest possible line.

With be, have and modals, retain the form needed in the answer itself. If a simple tense has no other auxiliary, do, does or did supports the ellipsis. A new subject may require different agreement.

Short answers, echo questions and expressions of agreement rely on the same recoverability. Word order depends on the construction: the statement I have, the echo question Have you?, and the agreement So have I. Do not use one order in every case.

Ellipsis recovers an action, not a mechanical copy of every word. The subject, polarity, tense and modality of the second clause may differ. After a question with will, an answer with might expresses possibility rather than a promise.

A new adverbial can remain after the auxiliary: tomorrow, by Friday, at home. It adds information while the already known action is not repeated. Check that the new remainder preserves the intended meaning, rather than merely looking similar in form.

When there are several auxiliaries, often only the first remains, but more can be retained. After a question with could have been, could, could have and could have been are all possible: context recovers omitted segments of different lengths.

You cannot arbitrarily remove the middle of a chain: could been breaks its structure. When the auxiliary form changes, or the modal before a passive changes, an additional be/been often helps preserve the structure naturally. There is no universal requirement to retain exactly one auxiliary.

In a standard affirmative short answer, a final auxiliary standing on its own is not contracted with the subject: Yes, I am; Yes, we have. Yes, I'm and Yes, we've cannot simply replace these complete answers.

Negative contractions can stand at the end: I haven't, she isn't, we can't. An affirmative contraction is also possible when something follows it: I'm working; we've finished; she's been. Do not extend the restriction on a final remainder to every contraction in a sentence.

The full action is usually mentioned earlier, but sometimes appears later. An opening condition such as If you can may refer to the request that follows. What matters is a clear connection, not a strict rule allowing only backward reference. If several actions are possible, clarification or full repetition may be better.

In British English, do can appear after a modal as a substitute for the main verb: I might do. This is a related, appropriate way to avoid repetition, not an automatic error. In an exercise requiring a particular remainder, follow the stated instructions; in an open answer, assess meaning and grammaticality, not just a match with the model.

In informal conversation, an obvious initial subject or an initial subject-and-auxiliary block is often left unspoken. The remaining verb form must fit the full construction: Waiting…? corresponds to Are you waiting…?, while Seen…? corresponds to Have you seen…?

The auxiliary alone can also be omitted: You ready? or You coming with us? Do not turn this into a universal rule for every pronoun or modal meaning. For example, an ordinary question about yourself is better formed as Am I interrupting?, rather than mechanically copying You ready? with I.

Conversational initial ellipsis and brief notes do not follow exactly the same conventions. Notes can begin with forms such as Am working from home today; in ordinary conversation, I’m working from home today or Working from home today are safer choices. This is a register restriction, not grounds for declaring every short note ungrammatical.

A noun or adjective phrase can function as a complete utterance: Another biscuit?, Lovely view!, Ready now. Gesture, intonation, preceding words and expectations explain its function.

It helps to ask where the meaning is primarily recovered from. In Who has the key? — Marta., the preceding question already provides the slot for the answer. In a silent scene with a coffee pot, no preceding sentence is needed. These supports often combine, however: a fragment answer can also draw on the situation.

Not every short inscription should be described as the result of deleting words from one full sentence. Captions and conventional signs have their own forms; understanding their function matters more than inventing an exact original text.

A note on a desk can leave its writer unnamed: Back in five minutes. A sign by a lift can leave the lift unnamed: Out of order. The location of the writing supplies part of the meaning. Without that location, the same phrase may be unclear.

News headlines often omit articles or be. They may be noun phrases, descriptions of states or passive constructions without auxiliaries. But this is not an instruction to “delete all function words”: causes, prepositional relationships, negation and numbers must remain clear.

A headline alone does not always determine whether the full version would have is, was or has been. Choose the tense according to the news. The separate headline convention of using the Present Simple for past events is not simply auxiliary omission. Capitalisation likewise belongs to presentation rather than the grammatical essence of ellipsis.

Would you like me to call a taxi? is a correct, natural question. Taxi? is a possible short alternative when the meaning is already clear. A full form can be polite, precise, neutral or overly ceremonious, depending on the words and situation.

Do not judge grammar by the length of an utterance. Formal I shall be proceeding on foot is grammatically possible, although I’m walking or No thanks, walking is usually sufficient for a brief everyday refusal. Stylistic oddness is not the same as a structural error.

Exercises sometimes explicitly ask for an elliptical or full form. A grammatical sentence may fail to meet that learning target. This means “a different form is needed for this task”, not “you cannot say that in English”.

The remaining words must form an acceptable construction. Waiting for the lift? can expand to Are you waiting for the lift?, but not Do you waiting for the lift? Ellipsis does not change the requirements of the verb form.

Initial omission does not automatically extend inside a finite subordinate clause: I stayed inside because it was raining requires it. However, separate reduced constructions such as when ready or if necessary do exist; do not ban them with a general rule that “nothing can be omitted after conjunctions”.

Expansion must respect the limits of other constructions. A standard short answer such as Yes, I am or Yes, I have does not end with the contraction I’m or I’ve. These answers are a neighbouring type of ellipsis after an auxiliary, not a reason to change the rule for every shortened utterance.

Do not delete what determines the meaning: not, still, again, a number or an important reference point. If shortening changes the reported fact, it is no longer just an economy of words.

First identify the intention: an offer, request, clarification, evaluation or report. Then identify the shared support for yourself: a visible object, the participants’ roles, a preceding utterance or the location of a sign.

Next, check what remains: have negation, time details or important relationships been lost? Finally, imagine a new listener. If they do not know who or what is meant, add the needed word or ask a clarifying question.

Do not try to shorten every sentence. In practice, a short question and a full answer, or a fragmentary note and a precise explanation, often work together. In open-ended exercises, compare your answer with the meaning and criteria; the model only shows one possible version.