The river is polluted
The flowers were water by Lucy.
语态：表示主语和谓语动词之间的关系。 英语有两种语态，即主动语态和被动语态。 主动语态：表示主语是动作的执行者。 被动语态：表示主语是动作的承受者。 如： Many students study English.(主动语态) English is studied by many students. (被动语态)
助动词be+过去分词 (be + done)
1.Many students study English. English is studied by many students.
2.They make shoes in that factory. Shoes are made by themin that factory.
1. They bought a computer last term． A computer was bought by them last term.
2.We planted many trees last year.
Many trees were planted last year.
be going to be/will be+过去分词
1.They will finish the work in ten days.
The work will be finished by them in ten days.
2.Tom is going to clean the room tomorrow.
The room is going to be cleaned by Tom tomorrow
can/may/must/should + be+过去分词 1.Amy can take good care of Gina ．
Gina can be taken good care of by Amy. 2.You should drink more water.
More water should be drunk by you.
is / am / are + being ＋过去分词
1.Some workers are painting the rooms now．
The rooms are being painted by some workers now.
2.He is watching TV.
TV is being watched by him.
have / has ＋been ＋过去分词
1.We have made a key．
has been made
2.We have finished our compositions.
Our compositions have been finished by us.
Such books are written for children. 这些书是为儿童写的。
The cup was broken by David.
It’s said / reported / + that …据说/据报道 It’s reported that it will rain tomorrow. 据报道，明天会下雨。
give me a book = give a book to me
如：1.He gave me a book. －I was given a book by him. －A book was given to me by Tom. 2. I bought him a book. －He was bought a book by me. －A book was buoght for him by me.
They take good care of my child. -----My child is taken good care of . I turned off the radio. ---The radio was turned off (by me).
即hear , watch , see , make , let ,这些词在 主动句中，其后的动词不加to，但变被动 句时必须加to.
1.I saw him play basketball last
Sunday. He was seen to play basketball last Sunday. 2.The boss makes him work for 10 hours.
He is made
to work for 10 hours.
a boy called Tom 一个叫Tom的男孩
a book bought yesterday 一本昨天买的书
get/make/have sth done 使某物被… make me understood 使我被理解/使人理解我
have my hair cut 使我头发被剪/请人给我剪头
词时，不能改为被动语态。 We often help each other. 2）have, take place,happen,feel感觉起来,look 看起来,sound,taste,smell不用于被动 如: I have a bike. An accident happened to him. The music sounds beautiful.
一般现在时 am/is/are 表格：被动态基本结构
过去进行时 一般将来时 现在完成时
done was/were done am/is/are being done was/were being done be going to/will be done have/has been done