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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/aretaken am/is/arebeing 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 /weretaken was/werebeing taken had been taken would/shouldbe 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.
