Unit 7 Teenagers should be allowed to choose their own clothes. SectionA 4a-4c 课件(共21张PPT)

(共21张PPT)
Unit 7 Teenagers should be allowed to choose their own clothes. Section A 4a-4c
● To learn should/ may + be allowed to
● To practice passive voice.
Learning Objectives
Revision
呆在某人身边
拥抱某人
在10点前回来
呆在外面；不回来
后悔做过某事
举起；提起
1. stay by one’s side
2. give sb. a hug
3. be back by ten
4. stay out
5. regret doing sth.
6. lift up
Free-talk
A: What rules do you have at school
B: ......
A: What rules do your have at home
B: ...
I’m not allowed to eat in the classroom.
I’m not allowed to run in the hallways.
I’m not allowed to go out with my friend at night.
I’m not allowed to watch TV at home.
Presentation
Grammar Focus
I don’t think sixteen-year-olds should be allowed to drive. I agree. They aren’t serious enough.
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 some photos if we don’t use a flash If you don’t use a flash, then it may be OK.
should/ may + be + done
[探究]含有情态动词的被动语态
1.概念：“语态”表示句子的主语和谓语之间的关系
英语中有两种语态，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。
2.结构：情态动词+be+ 及物动词的过去分词。
[探究] 含情态动词的被动语态的句型结构
句式 结构
肯定句
主语+情态动词+ be +及物动词的过去分词（ +by+宾语）.
否定句
主语+情态动词+not + be +及物动词的过去分词（ +by +宾语）.
一般疑问句
情态动词+主语+ be +及物动词的过去分词（+by +宾语）？
特殊疑问句
特殊疑问词+情态动词+主语+be+及物动词的过去分词（+by +宾语）？
主动语态和被动语态的相互转化
有情态动词的主动句变为被动句时:
（1）把主动句的宾语变为被动句的主语；
（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）主动句的主语在被动句中变为by的宾语；
（4）其他成分不变。
活学活用
We should finish our homework on time. (变被动语态)
Our homework ______ ______ ____ by us on time.
should be finished
Rewrite the sentences according to the example.
4a
You must clean your bedroom every day.
Your bedroom___________________________
Parents will encourage teenagers to do social
work for their community.
Teenagers _______________________________
_______________________________________
must be cleaned every day.
should be encouraged (by their parents) to do
social work for their community.
n.社区；社团
3. Can Lucy do her homework tomorrow instead
Can ________________________________________
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________________________________________
Lucy’s homework be done tomorrow instead.
must be kept away from the Internet.
keep sb./ sth. away from使某人/某物远离……
should be given chances to make their own decisions.
n.机会；可能性
4b
Fill in the blanks with the correct forms of the words in brackets.
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 be educated to take care of themselves from a young age. This way, when they ______ (start) working they can manage their own lives.
v. 完成（困难的事）；
应付（困难局面）
be asked
are allowed
start
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.
move
take
continue
4c
You and your friend are starting an English club. Make a list of rules about what should and should not be allowed.
A:Members should be allowed to use
dictionaries.
B: Yes, but they should only use
English-English dictionaries.
Members should be allowed to read newspapers.
Yes, but they should only allowed to read English newspapers.
1. My computer can be used by him.(改为主动语态)
_____ _______ _______my computer.
2. I think we should allow teenagers to have part-time
jobs. (改为被动语态)
I think teenagers should_____ _____ _____ have
part-time jobs.
He can use
Exercises
be allowed to
Summary
含情态动词
的被动语态
否定句
一般疑问句
肯定句
结构：
主动语态 被动语态
特殊疑问句
GOOD JOB