当句子的主语是动作的执行者时， 谓语的形式是主动语态。当句子的 主语是动作的承受者时，谓语要用 被动语态。被动语态由助动词be+ 过去分词构成，时态通过be表现出 来。
be + Vp.p(动词的过去分词）
1)be 动词可以随时态人称的变化而 变化 am/ is / are + V(过去分词） was/ were+ V(过去分词）
will be + V(过去分词）
情态动词+ be + V (过去分词）
2)以不发音e结尾的加-d 3)以辅音加y结尾的，去y变i加-ed 4)以重读闭音节结尾，末尾只有一个辅音字母， 先双写该辅音字母，再加-ed
done do write written go gone
2.不规则动词的过去分词： am have been is had has are
are planted byhim
宾语提前主语变， 原主变宾by后见， 时态人称be关键。
Tom will clean the room tomorrow.
The room will be cleaned by Tom tomorrow.
His brother washes bowls every 宾(受动者) day. 主 谓
Bowls are washed byhis brother every day.
1.They make shoes in that factory.
主语+及物动词+宾语 Shoes are made factory. 一般现在时： (by them) in that
S(主语）+am/is /are +过去分词
2. They term．
ten computers last
Ten computers were bought (by them) last term. 一般过去时：S+was/were +过去分词
3．Amy can take good care of Gina ． Gina can be taken good care of by Amy.
S+ can/may/must/should + be+过去分词
1）一般现在时：You are do this.
2）一般过去时：The story was told by her. 3）一般将来时：The problem will be discussed tomorrow.
4)情态动词：The rubbish can be put into the dustbin over there.
am/is/are +Vpp was/were +Vpp
一般现在 V(原形)/ V(e)s 时 一般过去 V-ed/ made 时
一般将来 will +V(原形) will+ be +Vpp 时 含情态动 情态动词+ 词 V(原形) 情态动词+ be +Vpp
一般现在时： 一般过去时： 情态动词：
各种时态的被动语态构成 S+am/is /are +P.P
S+ can/may/must/should + be+ P.P.
一般将来时： S+ will+be+ P.P.
现在进行时： S+ am/is/are + being + P.P.
现在完成时： S+ have/has + been+ P.P.
过去进行时： S+ was/were+being+ P.P.
一、行为主体不明确，不必说出或者无法 说出动作的执行者时。例如： Football is played all over the world． 二、不易找到或根本就不可能找到动作的 执行者时。例如： My bike was stolen．我的自行车被盗了。
It is said that one day he climbed to the top of a house and ……
It was reported that her mother died of SARS. 众所周知… … It is well known that …
据推测说… … It is supposed that …
四、汉语中含有“被”、“由”等词时。 例如： Tina is asked to come by Paul． Tina是被Paul叫来的。 五、某些句子习惯上用被动语态。例如：
He was born in October，1989．
1.People use knives for cutting things.
are ______ used for cutting Knives ______ things. 2.The students clean the windows of their classroom twice a month.
The windows of their classroom______ are cleaned twice a month. _______
3.I found the ticket on the floor. The ______ ticket ______ was ______ found on the ______ floor.
4.I told her to return the book in time.
was _______ told to return the book She ______ in time.
5. His doctor made him have only two meals a day. was _______ made _______ to have He ______ _______ only two meals a day. 6.Now people can use computers to help them. can ______ be Now computers _______ ______ used to help them.
7. Did you plant many trees at this time last year? Were many trees planted _______ ______ _______ _______
at this time last time?
8.Must we finish our work today?
Must be finished _______ our work______ _______ today?
9. The foreign friends gave us some wonderful stamps. we were _______ given some 1) _______ ______ wonderful stamps. 2) Some wonderful stamps _______ were ________ given _______ to _______. us
10.The teacher asked Tom to turn on the computer.
was ________ asked to turn on Tom _______ the computer.
11.In this factory women do most of the work.
Most of the work _______ ________ is done by women in this factory.
12.He can mend the bike in two days. can be mended The bike ______ ______ _______ in two days. 13.You must take this medicine three times a day. must be This medicine _______ _______ taken three times a day. ________
14.The students study German in this school. is studied by the German _______ ________ students in this school. 15.Do they often talk about this question?
talked Is ______ this question often _______ about _______ by them _______?
be allowed (allow) 1)Teenagers should _____ to go out at night.
was invented(invent) 2)The telephone _____ by Bell. spoken (speak) in China. 3) English is ____
is made(make) in China. 4) The car ____
cleaned (clean) 5) The room must be _____ every day.
( ) The flowers ____ every day,or they’ll die.
A must water B can be watered C should water D must be watered
( ) Many computers will ___ to our school.
A be bring B be brought C bring
4.They will finish the work in ten days.
The work will be finished (by them)
in ten days.
一般将来时： S+ will+be+过去分词
Some workers are painting the rooms now．
The rooms are being painted by some workers now. 现在进行时： S+ am/is/are + being +过去分词
6．We have made twenty more keys．
enty more keys have been made by us. 现在完成时：
S+ have/has + been+过去分词
7．I was doing my homework at 8:00 last night． My homework was being done (by me) at 8:00 last night. 过去进行时：
1.Bikes are made of metal.
2.My shirt is bought by my mother.
3.The bridge was built in 1951.
4.The work will be finished tomorrow. 5.Teenagers should be allowed to smoke 6.The flowers must be watered every day.