1.英语中的助动词有下面这些:
(1)be, am, is, are, was, were, been, being
(2)have, has, had, having
(3)shall, will, should, would
(4)do, does, did
这些助动词一般没有词义,主要帮助构成谓语,表示时态、语态、语气等,或构成疑问及否定形式。
2.助动词be可用来:
(1)构成进行时态:
Ill be seeing her at 10 tomorrow. 我明天十点和她会面。
What have you been doing these days? 这些天来你在干什么?
(2)构成被动语态:
What has been assigned for todays homework? 今天留了什么作业?
Preparations are being made for the speech contest. 演讲比赛的准备工作正在进行。
(3)和动词不定式构成复合谓语,表示按计划安排即将发生的事情:
A new hospital is to be built in our district. 我们区要修建一所新医院。
Where are we to meet? 我们在哪里碰头?
3.助动词have可用来:
(1)构成完成时态和完成进行时态:
Great successes have been achieved on all fronts. 在各个战线上都取得了巨大的胜利。
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