Unit 7 Teenagers should be allowed to choose their own clothes. Section A Grammar Focus-4c 课件(共25张P

(共25张PPT)
Unit 7 Teenagers should
be allowed to choose
their own clothes.
Section A
Grammar Focus-4c
community
keep...away from
chance
make one’s own decision
educate
manage
society
n. 社区；社团
避免接近；远离
n. 机会；可能性
自己做决定
v. 教育；教导
v. 完成；应付
n. 社会
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 photos if we don’t use a flash If you don’t use a flash, then it may be OK.
Grammar Focus
同意（某人的意见、观点等）
Review
一般现在时的被动语态
在英语中，动词有两种语态，即主动语态和被动语态。被动语态的基本结构是“助动词 be + 及物动词的过去分词”，其中助动词be有人称、数和时态的变化,其变化规则与be作为连系动 完全一样。
1.一般现在时被动语态的各种句式结构
肯定式 主语+am/is/are+过去分词（ + by…)
否定式 主语+am/is/are + not +过去分词 (+by…)
疑问式 Am/Is/Are+主语+过去分词(+ by …)
特殊疑问词+ am/is/are+主语+过去分词（+ by ...)
助记：
被动不离“be” “p.p.”, “p.p.”前面助动be。
主谓一致莫忘记，am, is, are现在时。
2.一般现在时被动语态的基本用法
用法 示例
表示经常性或习惯性发生的被动动作 I am often asked the question by my pupils.
表示近期正在发生的被动动作 These days people are moved by a teacher named Zhang Lili.
描述某种常态化的被动的客观事实 The spaceship is mainly controlled by computer.
强调目前存在的针对行为主体人的被 限制性动作 You aren’t allowed to take photos.
A:When was the zipper invented B:It was invented in 1893.
A:Who was it invented by B:It was invented by Whitcomb Judson.
A:When was tea brought to Korea B:It was brought to Korea during 6th and 7th centuries.
A:When were the shoes with lights invented B:They were invented last year.
A:What is the hot ice-cream used for B:It's used for serving really cold ice-cream.
Active Voice 主动语态 _____________________invented _____________ in 1876
Passive Voice 被动语态 The telephone was invented (by Alexander Graham Bell)in 1876.
Alexander Graham Bell
the telephone
subject 主语
object 宾语
宾变主，谓被动，主语放在by后
3. 主动语态变为被动语态的方法
时态 谓语动词形式
一般现在时 am/is/are+ done
一般过去时 was/were + done
一般将来时 will be done/ be (am,is,are) going to+ be done
现在进行时 am/is/are+ being done
过去进行时 was/were+ done
现在完成时 have/has+ been done
过去完成时 had + been done
过去将来时 Would be done/be(was,were)going to +be done
含有情态动词的被动语态
1. 含有情态动词的被动语态的句式结构
肯定句：
主语+情态动词+be+及物动词的过去分词+其他.
否定句：
主语 + 情态动词 + be + not + 及物动词的过去分词 +其他.
一般疑问句及答语：
情态动词+主语+be+及物动词的过去分词+其他
肯定回答：Yes, 主语+情态动词.
否定回答：No, 主语+情态动词+not.
特殊疑问词+情态动词+主语+be+及物动词的过去分词+其他
特殊疑问句：
(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, by 短
语常可省略。
2.含有情态动词的主动句变为被动句时,主要遵
循如下三点:
主动句：We should complete the work today.
被动句：The work should be completed(by us) today.
示例如下：
主语
谓语
宾语
一、单项选择。
1. If you are over 18 years old, you ____ to drive a
car in our country.
A. can allow B. can’t allow
C. can be allowed
2. — Tom is always careless with his school work.
Could you help him
— No problem! I think he ____ to think twice before
starting.
A. should be told B. shouldn’t be told
C. should tell
3. In summer, fruit and meat ____ long.
A. can’t be kept B. don’t keep
C. is not kept D. aren’t keeping
4. All the mobile phones should ____ during the
examination.
A. turn off B. be turned off
C. be turning off D. turned off
4a
Rewrite the sentences according to the example.
You must clean your bedroom every day.
Your bedroom ______________________________________.
I will do the housework in the afternoon.
The housework will ___________________________________.
3. Parents will encourage their children to do social work for their
community.
Children ___________________________________________.
must be cleaned every day
should be encouraged (by their parents) to do social work for their community
be done in the afternoon
4. Do you think we must keep teenagers away from the Internet
Do you think teenager
___________________________________________
5. Parents should give teenagers chances to make their own decisions.
Teenagers
________________________________________________.
must be kept away from the Internet
should be given chances to make their own decisions
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.
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.
Ⅰ.按要求完成下列各句。
1. We must do the work right now. (改为被动语态)
_____ ______ _____ _____ _______ right now.
The work must be done
Exercises
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
4. 你可以稍后考试。
You can _______ _______ _______ later.
5. 这项工作必须按时完成。
The work must _______ _______ on time.
6. 应允许青少年培养自己的爱好。
Teenagers _______ _______ _______ to develop
their own hobbies.
take the test
be finished
should be allowed
1. Their work must ____________ (finish) by four o’clock.
2. Your homework should __________ (do) by yourself.
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
II. 用所给词的适当形式填空。
Ⅲ. 句型转换。
1. You should make up the bed every day. (改为被动语态)
The bed _______ _______ _______ up every day.
2. We can’t see stars in the day time. (改为被动语态)
Stars _______ _______ _______ in the day time.
3. You must return the book on time. (改为被动语态的一般
疑问句形式)
_______ the book _______ _______ on time
should be made
can’t be seen
Must
be returned
Ⅳ. 翻译下列句子。
1. 需要好好地教育青少年。
_____________________________________
2. 这辆小汽车不能修了。
____________________________________
3. 这封信必须现在寄出去吗？
____________________________________
4. 会议应该在哪举行？
_____________________________________
Teenagers need to be educated well.
This car can’t be repaired.
Must this letter be posted now
Where should the meeting be held