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  2. English subjunctive - Wikipedia

    en.wikipedia.org/wiki/English_subjunctive

    The English subjunctive is realized as a finite but tenseless clause. Subjunctive clauses use a bare or plain verb form, which lacks any inflection. For instance, a subjunctive clause would use the verb form "be" rather than "am/is/are" and "arrive" rather than "arrives", regardless of the person and number of the subject. [4] (1) Subjunctive ...

  3. Present perfect - Wikipedia

    en.wikipedia.org/wiki/Present_perfect

    The present perfect is a grammatical combination of the present tense and perfect aspect that is used to express a past event that has present consequences. [1] The term is used particularly in the context of English grammar to refer to forms like "I have finished".

  4. Uses of English verb forms - Wikipedia

    en.wikipedia.org/wiki/Uses_of_English_verb_forms

    The present perfect may also be used with future reference, instead of the future perfect, in those dependent clauses where future occurrence is denoted by present tense (see § Dependent clauses below). For example: When you have written it, show it to me. For the possibility of a present perfect subjunctive, see English subjunctive.

  5. Subjunctive mood - Wikipedia

    en.wikipedia.org/wiki/Subjunctive_mood

    The subjunctive (also known as conjunctive in some languages) is a grammatical mood, a feature of an utterance that indicates the speaker's attitude toward it.Subjunctive forms of verbs are typically used to express various states of unreality such as wish, emotion, possibility, judgment, opinion, obligation, or action that has not yet occurred; the precise situations in which they are used ...

  6. Tense–aspect–mood - Wikipedia

    en.wikipedia.org/wiki/Tense–aspect–mood

    There are indicative mood forms for, in addition to the future-as-viewed-from-the-past usage of the conditional mood form, the following combinations: future; an imperfective past tense–aspect combination whose form can also be used in contrary-to-fact "if" clauses with present reference; a perfective past tense–aspect combination whose ...

  7. English verbs - Wikipedia

    en.wikipedia.org/wiki/English_verbs

    There is a perfect infinitive (to) have written and a perfect progressive infinitive (to) have been writing, and corresponding present participle/gerund forms having written and having been writing. A perfect subjunctive (have written) is also sometimes used. Future and conditional perfect forms are given below.

  8. Sequence of tenses - Wikipedia

    en.wikipedia.org/wiki/Sequence_of_tenses

    In Latin, the sequence of tenses rule affects dependent verbs in the subjunctive mood, mainly in indirect questions, indirect commands, and purpose clauses. [4] If the main verb is in one of the non-past tenses, the subordinate verb is usually in the present or perfect subjunctive (primary sequence); if the main verb is in one of the past tenses, the subordinate verb is usually in the ...

  9. Grammatical aspect - Wikipedia

    en.wikipedia.org/wiki/Grammatical_aspect

    Other terms for the contrast lexical vs. grammatical include: situation vs. viewpoint and inner vs. outer. [10] [11] Lexical aspect, also known as Aktionsart, is an inherent property of a verb or verb-complement phrase, and is not marked formally. The distinctions made as part of lexical aspect are different from those of grammatical aspect.