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 anthem¹ had been played the conference² 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.