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.
例The baby should be taken good care of by the baby-sitter.
例His mother gave him a present for his birthday. 可改为 He was given a present by his mother for his birthday.
例Someone caught the boy smoking a cigarette. 可改为The boy was caught smoking a cigarette.
4)在使役动词have, make, get以及感官动词see, watch, notice, hear, feel, observe等后面不定式作宾语补语时，在主动结构中不定式to要省略，但变为被动结构时，要加to。
例Someone saw a stranger walk into the building. 可改为A stranger was seen to walk into the building.
例The meeting is to be put off till Friday.
v.+ing 形式及不定式 to do 也有被动语态(一般时态和完成时态) 。
例I don't like being laughed at in the public.