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协助主要动词构成谓语动词词组的词叫助动词(Auxiliary Verb)。英语助动词在英语语法的学习过程中占有极其重要的地位。一般来讲,英语助动词可以分为两大类:基本助动词和情态助动词。基本助动词包括:be,have and do,其自身没有词义,不可单独使用,但可协助主要动词完成以下功用,a.表示时态,b.表示语态,c.构成疑问句,d.与否定副词not合用,构成否定句,e.加强语气。
Auxiliary Verb that assists the main verb form the predicate verb phrase. English auxiliary verbs play an extremely important role in the process of learning English grammar. In general, English auxiliary verbs can be divided into two categories: basic auxiliary verbs and modal auxiliary verbs. Basic aids include: be, have and do, which themselves do not have the word meaning, can not be used alone, but can assist the main verb to accomplish the following functions, a. Said tense, b. Said voice, c. Constitute questions, d and negative adverbs not combined to form a negative sentence, e. to enhance the tone.