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 to touch the exhibits.
2) has /have been done 現(xiàn)在完成時
例:All the preparations for the task have been completed, and we're ready to start.
3) am/is /are being done 現(xiàn)在進(jìn)行時
例:A new cinema is being built here.
4) was/were done 一般過去時
例：I was given ten minutes to decide 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(jìn)行時
例：A meeting was being held when I was there.
7) shall/will be done 一般將來時
例:Hundreds of jobs will be lost if the factory closes.
8) should/would be done 過去將來時
例：The news would be sent to the soldier'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 been completed before July.
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