Unit 7 Teenagers should be allowed to choose their own clothes.Section A 语法知识：被动语态 课件(共24张PPT)

(共24张PPT)
语法知识：被动语态
人教版九年级
Unit 7 Teenagers should be allowed
to choose their own clothes.
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。
被动语态的标志：被动语态由助动词be+过去分词构成，时态通过be表现出来。
am /is / are +动词的过去分词
一般现在时
一般过去时
被动语态的句型结构
was / were +动词的过去分词
一般现在时被动语态
His brother washes bowls every day.
主
谓
宾(受动者）
Bowls
are washed
by
his brother
every day.
结构：S(主语）+am/is /are +过去分词
一般现在时的例题解析
He sells the mooncakes at a low price.
主语
谓语
宾语
step2：找出谓语动词,变成结构是 be+done，sell的过去分词：sold,
step:1
step3：原主动句的主语如需要则放在by后面以它的宾格形式出现（注:不需要则可省略)
The mooncakes
are sold
by him.
at a low price
把原主动句中的宾语变为被动句的主语。
step4： 其它的成分（定语、状语）不变。
你会通过讲解的方法，将下列三个主动句变成被动句吗？
1.The boy cleans the classroom everyday.
2.My mom make a cake every week.
3.The people plant many trees on the hill.
by the boy everyday.
by my mom every week.
by the people on the hill.
The classroom
A cake
Many trees
is cleaned
is made
are planted
一般现在时被动语态练习
They play football on Sunday.
Football is played by them on Sunday.
Lucy does the homework in the evening.
The homework is done by Lucy in the evening.
They often use computers in class.
Computers are often used by them in class.
一般过去时被动语态
He looked after the little baby yesterday
主
谓
宾（受动者）
The little baby
was looked after
by
him
yesterday
结构：S+was/were +过去分词
Our parents advised us not to go out alone.
step:1
主语
谓语
宾语
step2：找出谓语动词,变成结构是 be+done，advise的过去分词：advised
We
were advised
by our parents.
not to go out alone
把原主动句中的宾语变为被动句的主语。
step3：原主动句的主语如需要则放在by后面以它的宾格形式出现（注:不需要则可省略)
step4： 其它的成分（定语、状语）不变。
一般过去时的例题解析
你会通过讲解的方法，将下列三个主动句变成被动句吗？
1.He planted the trees two days ago.
2.Judson invented the zipper in 1893.
3.People brought tea to Korea.
by him two days ago.
by Judson in 1893.
by People to Korea.
The trees
The zipper
Tea
were planted
was invented
was brought
一般过去时被动语态练习
They built the tall building last year.
The tall building was built by them last year.
He took good care of his little brother yesterday.
His little brother was taken good care of by him yesterday.
We cleaned our classroom just now.
Our classroom was cleaned by us just now.
一般将来时被动语态
Tom will clean the room tomorrow.
主
谓
宾
The room
will be cleaned
by
Tom
tomorrow.
结构：S+ will+be+过去分词
一般将来时被动语态练习
We will have a sports meeting next week.
A sports meeting will be had by us next week.
Children will take some photos in the schoolyard tomorrow.
Some photos will be taken by children in the schoolyard tomorrow.
The headmaster will give a talk this afternoon.
A talk will be given by the headmaster this afternoon.
情态动词的被动语态
Amy can take good care of Gina ．
主
谓
宾
Gina
can be taken good care of
by
Amy
结构：S+ 情态动词+ be+过去分词
can/may/must/need/would/should/would/could/might...
情态动词的被动语态练习
He can take care of the baby.
The baby can be taken care of by him.
Lucy may draw the pictures.
The picture may be drawn by Lucy.
You must turn off the lights.
The lights must be turned off by you.
现在进行时被动语态
Some workers are painting the rooms now．
主
谓
宾
The rooms
are being painted
by
some workers
now.
结构：S+ am/is/are + being +过去分词
现在完成时被动语态
We have made twenty more keys．
主
谓语
宾
Twenty more keys
have been made
by
us
结构：S+ have/has + been+过去分词
被动语态特殊情况
They make us do all the work.
We are made to do all the work by them.
We often hear her sing songs.
She is often heard to sing songs by us.
使役动词let/make/have,感官动词see/watch/feel/hear/notice等在主动语态中省略to，在被动语态中加上to
被动语态特殊情况
He gives me a flower everyday.
被动1 I am given a flower by him everyday.
被动2 A flower is given to me by him everyday.
My mother bought me a computer.
被动1 I was bought a computer by my mother .
被动2 A computer was bought for me by my mother .
当动词带双宾时（一个指人的宾语，一个指物的宾语），指人的宾语提前做被动句的主语时，指物的宾语照抄；如果是指物的宾语提前做被动句主语，指人的宾语前需加介词“to/for”,常见加to的动词有give，send, teach，write, show, pass, ask, tell…常见加for的动词有make, draw, buy…
1.单项选择：
(1).Cotton _______ in the southeast of China.
A. is grown B. are grown С.grows D. grow
(2).The Great Wall _______ all over theworld.
A. knows B. knew C. is known D. was known
(3).The keys _______ _______ by him.
A. did; found B. were; found
C. was; found D. was; find
(4). Smoking ___ in public places in China.
A. allows B. doesn't allow C. allowed D.isn't allowed
(puters________ by him last week.
A. were used B. use C. is used D. uses
小试牛刀
2.给词的适当形式填空。
(1).Chinese___the most widely________ (speak) in the world.
(2).The lost boy______________(find) just now.
(3).Last year, a large number of trees___________ (cut) down.
(4).The students____ often_____ (tell) to take care of their desks and chairs.
(5). Vegetables and fruits_________(sell) in this shop.
is spoken
was found
was cut
are sold
are told
1.We used the hot ice-cream scoop for serving cold ice-cream.
2.Many boys enjoy the active sports.
3.We believe him.
4.He bought his children some pens.
5.The policeman caught a thief yesterday.
→The hot ice-cream scoop was used for serving cold ice-cream.
→The active sports are enjoyed by many boys.
→He is believed by us.
→Some pens were bought for his children by him.
→A thief was caught by the policeman yesterday.
你会通过讲解的方法，将下列五个主动句变成被动句吗？
1.原句宾语变主语
2.看时态，看人称，灵活使用be
谓语动词变成过去分词
3.原句主语需放在by后变宾格形式
4.其它的成分（定语、状语）不变。
总结技巧：