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被动语态的基本时态变化 过去进行时的被动语态

  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 一般将来时

 

  例:Hundreds of jobs will be lost if the factory closes.

 

  8) should/would be done 过去将来时

 

  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.

 

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