S + V + O 主动语态 ......改被动语态=== O + [beV +pp] +by+ S
My mother [cooks] dinner.=== Dinner [is cooked] by my mother.
1．简单式之被动语态
说明：A现在式被动：S+am/is/are+p.p.
B过去式被动：S+was/were+p.p.
C未来式被动：S+will be+p.p.
The meeting will be hold next week.
2．进行式之被动语态
说明：A现在进行式被动：S+am/is/are+being+p.p.
B过去进行式被动：S+was/were+being+p.p.
例句：A baseball game was being started at 7 o’clock last night.
*** 3．完成式之被动语态
说明：A现在完成式被动：S+has/have been+p.p.
B过去完成式被动：S+had been+p.p.
C未来完成式被动：S+will have been+p.p.
例句：Have you ever been bitten by a dog?
4．助动词之被动语态
说明：A必须被..must be +p.p.
B应该做…should/ought to +be+p.p.
C能被…can be +p.p.
例句：Must this letter is written in English?
He should take the medicine after dinner.
5．不定词与动名词之被动表达法
说明：A不定词之被动写法：to be +p.p.
B动名词之被动写法：being+p.p.
例句：The room is going to be painted.
6．感官动词与使役动词之被动表达法
说明：A S+ be{seen/made} to+V
B S+have+物+p.p.
C S+let+物+be+p.p.
例句：I saw her run into the room.= She was seen to run into the room.
We saw them playing softball. = They were seen playing softball by us.
Miss Lin made me wash the windows.= I was made to wash the windows by Miss Lin.
Do your homework. = Let your homework be done.
7．动词片语改为被动式
动词片语改为被动式时，其后之介词要保留下来
People listened to the important game.
The important game was be listened
END!!!
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