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  2. English modal auxiliary verbs - Wikipedia

    en.wikipedia.org/wiki/English_modal_auxiliary_verbs

    The English modal auxiliary verbs are a subset of the English auxiliary verbs used mostly to express modality, properties such as possibility and obligation. [a] They can most easily be distinguished from other verbs by their defectiveness (they do not have participles or plain forms [b]) and by their lack of the ending ‑(e)s for the third-person singular.

  3. English auxiliary verbs - Wikipedia

    en.wikipedia.org/wiki/English_auxiliary_verbs

    The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...

  4. Modal verb - Wikipedia

    en.wikipedia.org/wiki/Modal_verb

    As in English, modality can be indicated either lexically, with main verbs such as yào "want" followed by another main verb, or with auxiliary verbs. In Mandarin the auxiliary verbs have six properties that distinguish them from main verbs: [8]: pp.173–174 They must co-occur with a verb (or an understood verb).

  5. Oxford Placement Test - Wikipedia

    en.wikipedia.org/wiki/Oxford_Placement_Test

    The Oxford Placement Test (OPT), also called the Oxford Online Placement Test (OOPT), is an on demand computer-adaptive test of the English language for non-native speakers of English, reporting at Pre-A1, A1, A2, B1, B2, C1, and C2 levels of the Common European Framework of Reference (CEFR).

  6. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    An advanced English syntax based on the principles and requirements of the Grammatical society. London: Keegan Paul, Trench, Trubner & co. A new edition of An advanced English syntax, prepared from the author's materials by B. D. H. Miller, was published as Modern English syntax in 1971. Palmer, F. R. (1974). The English verb. London: Longman.

  7. Epistemic modality - Wikipedia

    en.wikipedia.org/wiki/Epistemic_modality

    Epistemic modality is exemplified by the English modals may, might, must. However, it occurs cross-linguistically, encoded in a wide variety of lexical items and grammatical structures. Epistemic modality has been studied from many perspectives within linguistics and philosophy. It is one of the most studied phenomena in formal semantics.