Unit 7 Teenagers should be allowed to choose their own clothes. Section A （Grammar Focus-4c）课件(共29张P

(共29张PPT)
Unit 7
Teenagers should be allowed
to choose their own clothes.
Section A (Grammar Focus~4c)
let’s talk
Talk about your school rules with your partenrer.
Don't arrive late for school
Students are not allowed
to arrive late for school.
let’s talk
Talk about your school rules with your partenrer.
Don't eat in the classroom.
Students are not allowed
to eat in the classroom.
= Students should not be allowed to
sleep in class.
Don’t sleep in class.
Talk about school rules with
“should (not) be allowed to ”
= Students should not be allowed to cheat.
Don’t cheat.
Talk about school rules with
“should (not) be allowed to ”
时态 被动语态结构
一般现在时 am/is/are + done
一般过去时 was/were + done
含有情态动词 情态动词 + be + done
应该should, 必须must, 可能may/might, 能够can/could, 将要will/would...
不变
一般将来时的被动语态：主语+will be+done
主语+be going to be +done
Grammar Focus
1.--I don’t think sixteen-year-olds should be allowed to drive.
--I agree. They aren’t serious enough.
2.--Do you think teenagers should be encouraged to make their
own decisions
--No ,I don’t agree with this. Teenagers are too young to make their own decisions.
3.--Teenagers should not be allowed to have part-time jobs.
--I disagree. They can learn a lot from working.
4.--Do you think we may be allowed to take photos if we don’t use a flash
--If you don’t use a flash, then it may be OK.
我认为不应该允许16岁的青少年开车。
我同意。他们不够稳重。
你认为应该鼓励青少年自己做决定吗？
不，我不同意这一点。青少年太年轻不能自己做决定。
不应该允许青少年做兼职工作。
我不同意。他们能从工作中学会很多。
如果我们不用闪光灯，你认为我们可能被允许拍照吗？
假如你们不用闪光灯，那么也许可以。
Do you think teenagers should be encouraged to make their own decisions No, I don’t agree with this. Teenagers are too young to make their own decisions.
Teenagers should not be allowed to have part-time jobs. I disagree. They can learn a lot from working.
Do you think we may be allowed to take photos if we don’t use a flash If you don’t use a flash, then it may be OK.
I don’t think sixteen-year-olds should be allowed to drive. I agree. They aren’t serious enough.
Grammar Focus
含有情态动词的被动语态：
情态动词+be+动词的过去分词
Find the passive voice
find out the common features.
含情态动词的被动语态
肯定句：主语+ 情态动词+be+动词过去分词.
否定句：主语+情态动词+not+ be+动词过去分词.
一般疑问句：情态动词+ 主语+ be+ 动词过去分词
特殊疑问句：特殊疑问句+情态动词（+主语）+be+过去分词
句式
Teenagers should be allowed to choose their own clothes.
应该允许青少年选择他们自己的服装。
Students should not be allowed to have part-time jobs.
不应该允许学生们做兼职工作。
Can these books be taken out of the reading room
可以把这些书带出阅览室吗？
When must the work be finished
这些工作必须什么时候完成？
句式 结构 示例
肯定句 主语+情态动词+be+及物动词的过去分词 Teenagers should be allowed to go shopping.
否定句 主语+情态动词+not+be+及物动词的过去分词 The word can’t be used in this sentence.
一般疑问句 情态动词+主语+be+及物动词的过去分词 Must the work be finished today
特殊疑问句 Who should be asked for help
特殊疑问词+被动语态的一般疑问句？
Conclusion
一般疑问句结构：
My homework
should
be done
your homework
Should
(by me)
every day.
(by you)

Do an exercise
Asking questions can be allowed during class.
Can asking questions be allowed during class
情态动词+主语+be done+其它
Grammar Focus
He
cleans
his bedroom
every day.
His bedroom
is cleaned
by him
every day.
动作执行者
谓语动词
动作承受者
其他成分
其他成分
动作执行者
动作承受者
谓语动词
主动语态
被动语态
主动语态转换为被动语态
如何把主动语态变为被动语态
I should do my homework every day.
主语
谓语
宾语
其它
My homework
should be done
every day.
(by me)
●含有情态动词的主动句变为被动句时，主要遵循如下三点：
(1）主动句中的宾语变为被动句中的主语；
(2）主动句中的谓语变为“情态动词＋ be ＋及物动词的过去分词”;
(3）主动句中的主语变为介词 by的宾语，放在谓语之后 , by 的宾语常可省略。
主语 + 情态动词 + not + be + done + 其他内容.
易错点一：
表达否定时，“not”接在情态动词后。
Paper and water wasted by people.
A. will be not B. will not be
C. should be not D. should not be
2. In 2050, 2G used in the world.
A. will be not B. will not be
C. should be not D. should not be
易错点二：
情态动词 + 主语 + be + done + 其他内容
疑问句中， 情态动词后紧跟主语。
判断下列句子是否正确？正确（T）错误（F）
Should classroom be cleaned by students
Must be my room cleaned by myself now
Should be food wasted by people
Can the homework be finished tomorrow
Can be moon seen at night
T
F
F
T
F
1. We learned how to express agreement and disagreement.
I agree.
I agree with this.
I agree/think that … because …
I think so.
I disagree.
I don’t agree with this.
I don’t agree/think that … because …
I don’t think so.
Summary
2. I will do the housework in the afternoon.
The housework___________________________________________
3.Parents will encourage their children to do social work for their community.
Children______________________________________________
4. Do you think we must keep teenagers away from the Internet
Do you think teenagers__________________________________
5. Parents should give teenagers chances to make their own
decisions.
Teenagers______________________________________________
will be done in the afternooon.
will be encouraged (by parents) to do social work.
Rewrite the sentences according to the example.
1. You must clean your bedroom every day.
Your bedroom must be cleaned every day.
must be kept away from the Internet
should be given chances to make their own decisions.
4a
Should teenagers __________ (ask) to move out when they start working In many Western countries, teenagers ____________ (allow) to move out at eighteen. Their parents believe that they should _____________(educate) to take care of themselves from a young age. This way, when they ________ (start) working they can manage their own lives. However, in most Asian societies, it is not common for teenagers to _________ (move) out. Chinese parents believe that it is better for children to live with parents who can __________ (take) care of them. But the young should then look after their parents as they get older. That is why many Chinese adults __________ (continue) to live with their parents.
be asked
are allowed
be educated
start
move
take
continue
Fill in the blanks with the correct forms of the words in brackets.
4b
let’s do
You and your friend arestarting an English club .Maake a list of rules about what should and should not be allowed.
4c
A: Members should be allowed to use dictionaries.
B: Yes, but they should only use English-English
dictionaries.
Language points
should +be+及物动词的过去分词
Point
一、肯定句式：主语+情态动词+be+动词的过去分词+（by+宾语）
e.g.:Your homework should be finished by yourself.
你要自己完成家庭作业。
被动语态——含情态动词的被动语态
Language points
should +be+及物动词的过去分词
Point
二、否定句式：主语+情态动词+not+be+动词的过去分词+（by+宾语）
e.g.:Teenagers should not be allowed to go out at night.
青少年应当允许晚上出去。
被动语态——含情态动词的被动语态
1. Do you think we must keep teenagers away from the Internet
你认为我们必须使青少年远离因特网吗？
【句型解析】
keep(sb.) away from 意为“避免（某人）接近；（使某人）远离”。
eg:
Her illness kept her away from work for several weeks.
她病得好几周都没上班了。
2. Parents should give teenagers chances to make their own decisions.
chance 作可数名词，意为“机会”，表示“做某事的机会”，其后可接 to do sth.或 of doing sth.。
eg：It is a good chance to study (of studying) English.
这是一个学习英语的好机会。
give sb. a chance给某人一次机会
have a chance to do sth. 有机会做某事
have a chance of doing sth. 有机会做某事
by chance 偶然，意外地
将下面句子改为被动语态
We must clean our classroom every day.
__________________________________________
2. I will do the housework in the afternoon.
__________________________________________
3. Parents will encourage their children to do social work for their community.
_____________________________________________________
______________________________________________________
Our classroom must be cleaned by us every day.
The housework will be done by me in the afternoon.
Children will be encouraged to do social work for their community.
将下面句子改为被动语态
4. Do you think we must keep teenagers away from the Internet
______________________________________________________
5. Parents should give teenagers chances to make their own decision.
_______________________________________________________
Do you think teenagers must be kept away from the Internet
Teenagers should be given chances to make their own decision.
Ⅰ. 单项选择
1. Today a lot of information can _______ online.
A. receive B. be received C. is received
2. — Must we clean the classroom now
— No, you needn’t. It ______ after school.
A. may clean B. must clean C. can be cleaned
3. The song reminds me of my old school days as soon as it ______.
A. is played B. plays C. will be played
4.—Have you finished your project
—Not yet. I’ll finish it if I _______ ten more minutes.
A. give B. am given C. will give
5. —How often do I need to feed the dog
—It ___ food every day, or it will be hungry.
A. must give B. must be gave C. must be given
6. Children under 12 years old________ ride shared bikes. It's too dangerous.
A. shouldn't allow to B. shouldn't be allowed to C. shouldn't allow
2. Teenagers should be allowed to go out with their friends on school nights. (改为否定句 )
Teenagers _______ _______ _______ to go out with their friends on school nights.
3. A book should be read each month. (改为一般疑问句)
_______ _______ _______ _______ _______ each month
shouldn’t be allowed
Should a book be read
按要求完成下列各句每空一词含缩写。
1. We must do the work right now. (改为被动语态)
_______ _______ _______ _______ _______ right now.
The work must be done
Practice
1. Their work must ____________ (finish) by four o’clock.
2. Your homework should __________ (do) by ourself.
3. These books mustn’t __________ (take) out of the reading room.
4. Should these food _________ (keep) dry
be finished
be done
be taken
be kept
用所给词的适当形式填空。
Review passive voice we have learnt today.
Preview the new words we will use in the next lesson.
Homework