Complex Complementation

In the mandative subjunctive, the verb has its base form: she attend, he have, everyone be. There is no -s ending, and we do not add to. After that comes its own subject: she, not her.

The form be remains be with I, she, and they. This is not an imperative without a subject: the subordinate clause explicitly names the person who will act.

After a mandative verb, we can use should + the base form. This option is especially common in British English; the mandative subjunctive is standard in both varieties and is used more often in American English than in British English.

Should does not automatically make the requirement weaker here: the force of the statement is determined by demand, insist, recommend, and the situation. After should, there is neither to nor an -s ending.

To require an action not to happen, put not before the base form: that she not disclose. In the version with should: that she should not disclose; in an appropriate informal context, shouldn't disclose is also possible.

I do not recommend that… negates the recommendation itself. I recommend that… not… recommends refraining from the action. These are different messages; the absence of advice is not advice to do nothing.

If what matters is what receives the action, use be + the past participle: that the draft be checked. With should, we get should be checked.

The base form is be; the main verb after it has the participle form: sent, written, reviewed. For a prohibition in the passive: not be sent or should not be sent.

The tense of the main verb shows when the requirement was made: recommends / recommended / has recommended. The base form in the subordinate clause does not thereby become past tense.

In They demanded that he return, the form return does not mean that the return has already happened. Should can also remain after a past reporting verb. Specific time expressions help explain the sequence of events.

Suggest can mean “indicate / lead one to think,” while insist can mean “assert forcefully.” In that case, the sentence concerns an assessment of facts, not a desired action: the figures suggest that demand is falling; she insists that she paid. Do not mechanically replace such verbs with the subjunctive.

In British usage, indicative forms are also possible after a proposal, for example I suggest that she takes a break. This is not a universal error. In this exercise set, we practise two specific forms — the subjunctive and should; if a task limits the choice to these, that is the learning objective, not a prohibition against other standard variants.

That can often be omitted, especially in a short conversational utterance: I suggest we leave. Exercises state explicitly when that must be retained. The related form after lest has a different meaning — preventing an undesirable consequence — and is not practised here.

In standard written English, a wh-word is followed by the subject and then the verb: where the files are, why the plan failed, how we can help. Question inversion in a main clause is not carried into the subordinate clause.

Question-forming do, does or did disappears, and the main verb takes the appropriate form: Where does she work? → I wonder where she works. However, do is not banned altogether: in why she did not reply, it forms a negative; in what she does, it is the main verb; in what she DOES know, it may add emphasis.

In Who arrived first?, who already occupies the subject position. Therefore I know who arrived first needs no additional subject or rearrangement. The same applies to which + noun when that phrase names the performer of the action.

Compare who contacted Maya with who Maya contacted. In the first, we are identifying the person who contacted Maya; in the second, Maya contacted someone. Statement word order does not mean there must be a separate noun subject after every wh-word.

Why focuses on a reason, how on a method or process, where on a place, and when on a time. What asks about a thing, action or content; which identifies a choice from a set; how much and how many ask about an amount or quantity.

Do not memorize fixed pairings such as consider = whether or explain = why. You can consider why a plan failed, how to improve it or whether it is worth repeating. The choice depends on the intended meaning. At the same time, not every verb accepts every complement type: wonder whether naturally expresses uncertainty, while establish whether describes finding out a fact.

A yes/no question often requires whether or if: I wonder whether/if the office is open. Both are possible in this position. If does not become incorrect merely because the level is C1 or the context is business writing. Whether is particularly useful for explicitly stated alternatives.

Distinguish I do not know if they will call, which expresses uncertainty about a call, from I will wait if they call, where the call is a condition for waiting. After know, the clause identifies unknown information; after wait in the second example, it sets a condition.

In standard writing, choose whether or not when or not immediately follows the conjunction. With or not at the end, both are possible: I wonder if/whether they will agree or not. Whether to sign is also possible, but if to sign is not. Reduced infinitive clauses are a related boundary topic here, not a replacement for every full clause.

I know where the entrance is. is a statement. Do you know where the entrance is? asks the listener a question. In the second sentence, inversion is outside the embedded clause: Do you know. The embedded part where the entrance is does not change.

The form and function of the whole sentence determine the question mark, not the presence of a wh-word alone. Could you explain why the room is closed? correctly ends in a question mark. Please explain why the room is closed. is a request in imperative form.

Explain that the system failed is a grammatical report of the failure itself. Explain why the system failed concerns the reason. Explain how the system failed concerns the mechanism or process. Replacing why with that does not necessarily create a grammatical error, but may lose the intended meaning.

Not every what-clause is unambiguously a question. In Keep what you need, what means the thing or things that. In I wonder what you need, there is an unresolved question. I understand what you mean permits closely related readings: understanding the content of the message or understanding the answer to a question about the intended meaning. Context and function matter more than forcing a single syntactic label.

Informal speech sometimes uses direct-question order inside a report, as in I asked where was the exit. This is a feature of conversational reporting. In standard written English, use I asked where the exit was.

Embedding alone does not require a past tense. I wonder where she lives concerns the present. When reporting an earlier conversation, tense and pronouns depend on the reporting context; do not shift them mechanically just because there is a subordinate clause.

Before sending an email, find the verb that takes the clause, establish which information is missing, and check the subject inside it. Then check the opening and final punctuation of the whole sentence separately.

Remember doing means having a memory of the event itself: signing, seeing or speaking. The event comes before the recollection. Remember to do means keeping a required action in mind and carrying it out at the appropriate time.

In the reminder Remember to attach the file, attaching is still to be done. But I remembered to attach the file describes successfully remembering and performing the action in the past. It does not mean the file is still unattached.

I don’t remember sending it does not prove that the message was not sent: memory can fail. I didn’t remember to send it normally says that the required action was forgotten.

Forget doing means forgetting an event that happened. It often sounds natural with never: I’ll never forget hearing that announcement means the event will stay in memory. You can also clarify a lost memory: I had completely forgotten meeting her until she showed me the photograph.

Forget to do means failing to perform a required action through forgetfulness. In I forgot to upload the file, the problem is not the memory of uploading but the omitted upload.

Do not equate I forgot meeting her with I forgot to meet her. In the first, the meeting happened; in the second, the person missed the planned meeting. If you simply do not know whether something happened, I don’t remember doing… often expresses the uncertainty more accurately.

Stop doing names the activity that ends. It may be a habit or a brief action: stopped checking email means ending email checking; stopped speaking means becoming silent. Stop doing does not always mean giving something up permanently.

Stop to do names the purpose of stopping or pausing another activity. We stopped to check the map means we interrupted our journey in order to check it, not that we ceased checking it.

Both patterns can occur together: We stopped talking to hear the announcement. Talking is what ended; to hear is why. Purpose does not guarantee success: We stopped to buy tickets, but the office was closed contains no contradiction.

Try doing presents an action as an experiment or possible solution: see whether changing the lighting, order or procedure helps. Try to do focuses on an attempt to achieve a result, often despite difficulty.

Neither form alone tells us whether the attempt succeeded. I tried restarting it, but nothing changed means the method was tested but the problem remained. I tried to explain, and eventually she understood describes an effort that succeeded.

The same event can be viewed both ways. I tried opening the window presents opening as a method; I tried to open the window presents it as the goal of an effort. But, difficult and tomorrow are not mechanical answer keys. A closed exercise must explicitly establish the intended perspective.

Regret doing means regretting an action or omission: I regret sharing the draft; I regret not asking sooner. Having done can emphasise that it happened earlier, but ordinary doing is often sufficient.

Regret to inform / say / tell / announce is a formal way to deliver news with regret now. It does not replace every regret doing pattern; it is especially associated with communicating unwelcome information.

I regret telling you is grammatical: the speaker regrets having already told someone. If the task is to announce a decision now, that version changes the communicative intention. I’m sorry to say… is also natural in friendly conversation, but an exercise may explicitly target regret.

Go on doing means continuing an activity already begun. There may be a brief interruption, but the activity remains the same: after a question, the speaker continues explaining the same chart.

Go on to do means moving to the next action, topic or stage. The sequence may occur within a presentation or across a career. Do not confuse this infinitive with purpose after stop: went on to lead the team describes a later stage, not merely an intention to lead it someday.

Mean doing means involving, requiring or resulting in an action: accepting the role means travelling. The subject can be a decision or condition rather than a person with an intention.

Mean to do means intend. I meant to reply explains an intention but does not by itself prove that a reply was sent. I didn’t mean to interrupt denies the intention to interrupt, not necessarily the interruption itself.

Use the rule in conversation by asking precisely: is this a person’s plan or a consequence of the conditions? For all seven verbs, keep form, meaning and task fulfilment separate. A grammatically possible sentence may express a different meaning.