Unit 7 Teenagers should be allowed to choose their own clothes 单元语法活学巧练 语法精讲 习题课件

(共14张PPT)
被动语态——含情态动词的被动语态
句型结构
肯定句:主语十情态动词( should,must,may,
can, could)+be+及物动词的过去分词+(by
宾语).
eg: Teenagers should be allowed to have part
time jobs.应该允许青少年做兼职工作
否定句:主语十情态动词+ not be+及物动词的
过去分词十(by+宾语).
eg the book can't be taken out of the reading
room.这本书不能拿出阅览室。
般疑问句:情态动词十主语+be+及物动
的过去分词+(by+宾语)
回答:Yes,主语十情态动词./No,主语十情态
动词+not.
eg : Should these young trees be watered
every day 应该每天给这些小树浇水吗
Yes, they should. /No, they shouldnt
注意:must表示“必须”时,其否定回答应用
needn't,而need表示“必要,必须”时,其肯定回
答应用must
Must all the rooms be tidied up 所有的
房间都必须整理好吗
Yes, they must./No, they needn t
Need he be operated at once 他需要立即手
术吗
Yes. he must
Nohe neednt
、用所给单词的适当形式填空。
The old people should be spoken (speak) to
politely.
(常州)— Bad luck! My watch doesn' t work
we
Take it easy. It just needs to be repaire
repairing (repair
Must the work be finished finish) by6:30
this afternoon
4. Can this kind of bike be bought buy
that shop
The stars can not be seen (not see) in the
anytime
单项选择。
A )1. I think a bridge
over the river
should be built b. will build
C. is built
D. was built
A )2. Teenagers
allowed to drive
a. should not be b. should be not
not shou
Shouldn