被動語態(tài)的基本時態(tài)變化

被動語態(tài)通常為十種時態(tài)的被動形式, 被動語態(tài)由be+過去分詞構(gòu)成，be隨時態(tài)的變化而變化。以do為例，各種時態(tài)的被動語態(tài)形式為：

1) am/is/are +done (過去分詞) 一般現(xiàn)在時

例Visitors are requested not totouch the exhibits.

2) has /have been done 現(xiàn)在完成時

例All the preparations for thetask have been completed, and we're ready to start.

3) am/is /are being done 現(xiàn)在進行時

例A new cinema is being builthere.

4) was/were done 一般過去時

例I was given ten minutes todecide whether I should reject the offer.

5) had been done 過去完成時

例 By the end of last year,another new gymnasium had been completed in Beijing.

6) was/were being done 過去進行時

例A meeting was being held when Iwas there.

7) shall/will be done 一般將來時

例Hundreds of jobs will be lostif the factory closes.

8) should/would be done 過去將來時

例The news would be sent to thesoldier's mother as soon as it arrived.

9) shall/will have been done 將來完成時(少用)

例The project will have beencompleted before July.

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