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Academic Word List; Glossary of American terms not widely used in the United Kingdom; List of animal names; List of English abbreviations made by shortening words; List of homophonic abbreviations; English auxiliary verbs; List of English auxiliary verbs
Regular verbs have identical past tense and past participle forms in -ed, but there are 100 or so irregular English verbs with different forms (see list). The verbs have, do and say also have irregular third-person present tense forms (has, does /dʌz/, says /sɛz/).
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.
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 ...
Within the indicative mood, there is a present tense habitual aspect form (which can also be used with stative verbs), a past tense habitual aspect form (which also can be used with stative verbs), a near past tense form, a remote past tense form (which can also be used to convey past perspective on an immediately prior situation or event), a ...
Verbs ending in a consonant plus o also typically add -es: veto → vetoes. Verbs ending in a consonant plus y add -es after changing the y to an i: cry → cries. In terms of pronunciation, the ending is pronounced as / ɪ z / after sibilants (as in lurches), as / s / after voiceless consonants other than sibilants (as in makes), and as / z ...
Verbs of mental state, sense perception and similar (know, believe, want, think, see, hear, need, etc.) are generally used without progressive aspect, although some of them can be used in the progressive to imply an ongoing, often temporary situation (I am feeling lonely), or an activity (I am thinking about a problem). See also can see below.
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).