人教版九年級(jí)英語(yǔ)上冊(cè)《Teenagers should be allowed to choose their own clothes》SectionA PPT教學(xué)課件(第3課時(shí))，共35頁(yè)。
Objectives
To summarize the passive voice with the modal verbs.
To learn to use the grammar properly.
To learn some foreign cultures and learn to make rules.
Free talk
What can you do at school?
What can’t you do at school?
Do you agree or disagree?
Look at these sentences.
I think students should be allowed to do homework with friends.
Sixteen-year-olds should not be allowed to drive.
Do you think sixteen-year-olds should be allowed to choose their own clothes?
含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)
肯定句：主語(yǔ)+ 情態(tài)動(dòng)詞+be+ 動(dòng)詞過(guò)去分詞.
否定句：主語(yǔ)+情態(tài)動(dòng)詞+not+ be+動(dòng)詞過(guò)去分詞.
疑問(wèn)句：情態(tài)動(dòng)詞+ 主語(yǔ)+ be+ 動(dòng)詞過(guò)去分詞?
轉(zhuǎn)變方法
(一)將主動(dòng)語(yǔ)態(tài)的賓語(yǔ)變成被動(dòng)語(yǔ)態(tài)的主語(yǔ)。
(二)將含情態(tài)動(dòng)詞的主動(dòng)句式變成被動(dòng)句式，即：“情態(tài)動(dòng)詞+動(dòng)詞原形”變成“情態(tài)動(dòng)詞+be+過(guò)去分詞”，然后再在其后加“by+主動(dòng)句中的主語(yǔ)(人稱代詞用賓格)”。by短語(yǔ)也可省略。
含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)
常用的情態(tài)動(dòng)詞有：
can, could (能；會(huì)), may; might (可以)
must(必須), should(應(yīng)該), will; would(愿意)
have to(必須；不得不), had better(最好)
含有情態(tài)動(dòng)詞should的被動(dòng)語(yǔ)態(tài)
1.含有情態(tài)動(dòng)詞should的被動(dòng)語(yǔ)態(tài)結(jié)構(gòu)式：
should + be+及物動(dòng)詞的過(guò)去分詞。
(1)肯定句結(jié)構(gòu)為：主語(yǔ)+should be+及物動(dòng)詞的過(guò)去分詞+ (by+賓語(yǔ))。
eg: 你應(yīng)該自己完成作業(yè)。
Your homework should be finished by yourself.
(2)否定結(jié)構(gòu)為：主語(yǔ)+ should + not+ be +及物動(dòng)詞的過(guò)去分詞+ (by+賓語(yǔ))。
eg：不應(yīng)該允許青少年晚上外出。
Teenagers should not be allowed to go out at night.
(3)特殊疑問(wèn)句結(jié)構(gòu)為：疑問(wèn)詞+一般疑問(wèn)句？
eg：應(yīng)該允許學(xué)生們做什么？
What should students be allowed to do?
(4)一般疑問(wèn)句結(jié)構(gòu)為：Should +主語(yǔ)+ be+及物動(dòng)詞的過(guò)去分詞+ (by+賓語(yǔ))？
回答：Yes, 主語(yǔ)+should./ No, 主語(yǔ) + shouldn’t.
eg:這些小樹(shù)應(yīng)該每天澆水嗎？
Should these young trees be watered every day?
Yes, they should. /No, they shouldn’t.
對(duì)，應(yīng)該。/不，不應(yīng)該。
主動(dòng)句變被動(dòng)句的步驟與其它情況相同。
We should allow teenagers to watch TV on Sunday.
Teenagers should be allowed to watch TV on Sunday( by us).
People may catch fish in the river.
Fish may be caught in the river (by people).
►Teenagers should be allowed to choose their own clothes.
應(yīng)該允許青少年選擇他們自己的服裝。
►Students should not be allowed to have part-time jobs.
不應(yīng)該允許學(xué)生們做兼職工作。
►Can these books be taken out of the reading room?
可以把這些書(shū)帶出閱覽室嗎？
►When must the work be finished?
這些工作必須什么時(shí)候完成？
Rewrite the sentences according to the example.
1.You must clean your bedroom every day.
Your bedroom must be cleaned every day.
2. Parents should encourage teenagers to do social work for their community.
Teenagers should be encouraged (by their parents) to do social work for their community.
3. Can Lucy do her homework tomorrow instead?
Can the homework be done (by Lucy) tomorrow instead?
Homework
Are you satisfied with the rules at home? Try to write a letter to your parents and talk about the rules in a polite way.
... ... ...
關(guān)鍵詞：Teenagers should be allowed to choose their own clothes PPT課件免費(fèi)下載，.PPTX格式；
