作业帮英语被动语态定义 9种结构 对应的9个例句
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英语被动语态定义 9种结构 对应的9个例句
英语被动语态定义 9种结构 对应的9个例句
英语被动语态定义 9种结构 对应的9个例句
1 被动语态的构成
被动语态的基本结构是“助动词be +过去分词”.被动语态的谓语动词有各种时态变化,以动词take为例,将被动语态常见时态的动词形式列表如下：
一般现在时
现在进行时
现在完成时
一般将来时
am/is/are
taken
am/is/are
being taken
have/has been
taken
will/shall be
taken
一般过去时
过去进行时
过去完成时
过去将来时
was /were
taken
was/were
being taken
had been
taken
would/should
be taken
从上表中可以看出,被动语态的各种时态变化都是通过助动词“be”的各种时态来表示的,因此只要知道“be”的时态形式,也就掌握了被动语态构成
2 被动语态的基本时态变化
被动语态通常为十种时态的被动形式,被动语态由be＋过去分词构成,be随时态的变化而变 化.以do为例,各种时态的被动语态形式为：
1) am/is/are +done (过去分词) 一般现在时
例Visitors are requested not to touch the exhibits.
2） has /have been done 现在完成时
例All the preparations for the task have been completed,and we're ready to start.
3） am/is /are being done 现在进行时
例A new cinema is being built here．
4） was/were done 一般过去时
例I was given ten minutes to decide whether I should reject the offer.
5） had been done 过去完成时
例 By the end of last year,another new gymnasium had been completed in Beijing.
6） was/were being done 过去进行时
例A meeting was being held when I was there.
7） shall/will be done/ be going to be done/ be about to be done/ be to be to done一般将来时
例Hundreds of jobs will be lost if the factory closes.
8） should/would be done/ was\were going to be done/ was\were about to be done/was\were to be to done一般将来时
例The news would be sent to the soldier's mother as soon as it arrived.
9） shall/will have been done 将来完成时（少用）
例The project will have been completed before July.
10） should/would have been done 过去将来完成时（少用）
例He told me that his new clothes would have been made very soon.
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