词组	auxiliaries
释义	auxiliaries ◊ GRAMMAR An auxiliary or auxiliary verb is a verb that is used with a main verb to form a verb group. The auxiliaries 'be' and 'have' are used to form tenses. 'Be' is also used to form passive verb groups. The auxiliary 'do' is most commonly used in questions and negative clauses. I am feeling reckless tonight. They have been looking for you. Thirteen people were killed. Did you see him? I do not remember her. See entries at ↑ Tenses, ↑ Questions, and ↑ not. See entry at ↑ do for the use of 'do' to emphasize or focus on an action. You put the auxiliaries you want to use in the following order: 'have' (for perfect tenses), 'be' (for continuous tenses), 'be' (for passive tenses). Twenty-eight flights have been cancelled. Three broad strategies are being adopted. ◊ WARNING You do not use the auxiliary 'do' in combination with other auxiliaries. Auxiliaries are often used without a main verb when the verb has already been used. I didn't want to go but a friend of mine did. 'Have you been there before?' ---'Yes, I have.' See entries at ↑ Ellipsis and ↑ Replies. The different forms of the auxiliaries 'be', 'have', and 'do' are shown in the following table. ◊ modals Modals, such as 'can', 'should', 'might', and 'may', are also auxiliary verbs. You put them in front of all other auxiliaries. The law will be changed. She must have been dozing. For more information, see entry at ↑ Modals. ◊ contractions For information on the contracted forms of auxiliaries, see entry at ↑ Contractions.
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