The present subjunctive has the same form as the infinitive without to for all persons, including third person singular. It is used:

advise, agree, demand, insist, prefer, propose, recommend, request, suggest, urge etc.

advise, agree, demand, insist, prefer, propose, recommend, request, suggest, urge etc.

add, admit, agree, answer, believe, claim, complain, confess,  confirm, decide, deny, doubt, explain, feel, hope, insist, mention, promise, repeat, reply, say, suggest etc.

ImperativeThe sentence type used to express suggestions, directions or orders. E.g.: Clean your shoes, will you? sentences in indirect speech usually follow this structureThe way in which the parts of a sentence, clause or expression are arranged. E.g.: make somebody + infinitive in "The teacher made me rewrite the composition.":

subject + reporting verb + somebody + to + infinitive

In indirect speech yes/no and wh-questions follow a similar structureThe way in which the parts of a sentence, clause or expression are arranged. E.g.: make somebody + infinitive in "The teacher made me rewrite the composition.", but with different conjunctionA part of speech connecting words, clauses or sentences. E.g.: Although everyone but Julie heard the news, no one seemed to care. ("although", "but")s.

YES/NO questionA question without a question word; one to which the answer is "yes" or "no". E.g.: Are you old enough to enter?s

subject + reporting verb + if/whether + clause (with no inversion)

DeclarativeThe sentence type used to make statements; it can be an affirmative sentence or a negative sentence. E.g.: John likes squash a lot. Tim has no friends. sentences can be affirmativeA declarative sentence indicating "yes"; also called a positive sentence. E.g.: John likes squash a lot. and negativeA declarative sentence indicating "no". E.g.: Tim has no friends.. Most declarative sentences in indirect speech follow this structureThe way in which the parts of a sentence, clause or expression are arranged. E.g.: make somebody + infinitive in "The teacher made me rewrite the composition.":

subject + reporting verb (+that) + clause

Everybody knows that my grandfather likes red wine.

In indirect speech, if we want to avoid the use of the general subjectThe person or thing that performs the action of a verb or that is described by a verb. E.g.: Andy has never been to Brunei. ("Andy")s everybody, they, people, one etc., we often use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice)., especially with reporting verbA part of speech that expresses an action or a state. E.g.: John seldom plays tennis.s such as believe, know, say, think, assume, claim, consider, find, presume or report.