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英语中有两种语态：主动语态和被动语态。 语态是动词的一种形式，用来说明主语和谓语之间的关系。
如果主语是动作的执行者，谓语用主动语态，如“We clean the room every day.”；如果主语是动作的承受者，或者说是动作的对象，谓语则是要用被动语态，如“The room is cleaned every day.”
被动语态的各种形式：
1) am/is/are +done
I’m asked to take care of myself.
Football is played all over the world.
2) has /have been done
This book has been translated into many foreign languages.
The prices of many goods have been cut again .
3) am/is /are being done
A road is being built around the mountain.
Many new houses are being built in this city.
4) was/were done
This house was built in 1958.
His leg was broken in an accident.
5) had been done
A new school had been set up by the end of last year.
When the anthem had been played the conference began.
6) was/were being done
The meeting was being held when I was there.
We were being trained this time last year.
7) shall/will be done
More factories will be built in our city.
He will be taken to hospital tomorrow.
8) shall/will have been done
The project will have been completed before July.
Your clothes shall have been made for you soon.
9) should/would be done
He told me that his new cloths would be made by his mother.
10) should/would have been done
He told me that his new clothes would have been made very soon. | 
