资源简介

(共20张PPT)
Unit 2
Grammar Focus
No rules,no order.
—Amy, ___________ talking now. We are having a class!
—Sorry, I won’t.
A. to stop B. stop C. stops D. stopping
2
Let Ken ________ you his new timetable.
A. show B. shows C. to show D. showing
3
—________ eat anything in class, Mike.
—Oh, I’m sorry.
A. Can’t B. Not C. Doesn’t D. Don’t
1
1. Let me _____ (tell) you about my family.
2. ___________ (not listen) to music in class.
3. Do you have to ______ (wear) school uniforms every day
4. You can’t eat in the classroom. You can _____ (eat) in the dining hall.
5. You must _____ (be) quiet in the library.
6. No ___________ (swim) in the river! It is too dangerous.
7. Boys and girls, please _____ (keep) the classroom tidy in school.
8. Everybody ________ (must, may) follow the traffic rules.
tell
Don’t listen
wear
eat
be
swimming
keep
must
祈使句(Imperative Sentence)
1.概念：一般用来表示请求、命令、劝说、号召、警告等。
2.用法：在祈使句中, 通常省略第二人称主语you。肯定式以动词原形开头，否定式一般在动词原形前加don’t。
3.句末标点符号：用感叹号或句号。
4.语调：读降调。
肯定祈使句
否定祈使句
1. 以行为动词原形开头，简称Do型 e.g. Come here.
2. 以动词be开头，简称Be型
e.g. Be quiet, please.
3. 以Let开头，简称Let型
e.g. Let’s go!
e.g.Don’t play computer games.
e.g.Don’t be late again.
e.g.No photos.
No swimming.
1.Don’t +动词原形+宾语 +其他.
3.No + n./v.-ing.
2.Don’t + be +其他.
Turn off the Tv,please.
Go and wash your hands.
Let's play basketball.
Have a good day!
Be kind to your classmates.
No smoking!
可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。
请求
命令
建议
叮嘱
祝愿
禁止
各种情感的祈使句
1.肯定句:
主语+can+动词原形+其他.
2.否定句：
主语+can not/can’t+动词原形+其他.
3.疑问句:
Can+主语+动词原形+其他
肯定回答：Yes, 主语+can.
否定回答：No, 主语+can’t.
情态动词can
1.肯定句:
主语+must+动词原形+其他.
2.否定句：
主语+must not/mustn’t+动词原形+其他.
3.疑问句:
Must+I+动词原形+其他
肯定回答：Yes, you must.
否定回答：No, you needn’t/don't have to.
情态动词must
We must help others when they are in trouble .
当别人有困难时我们必须要帮助他们（责任感的驱使,主观上必须做）
He has to stay here because it's raining
因为下雨，他不得不呆在这。(受客观因素的影响)
情态动词 must & have to
1. Don't jump the queue.You wait your turn.
2.I feed my dog many kinds of food, but I give him
chocolate. It is bad for him!
3. A: Can I leave the classroom if I don't feel well
B: Yes, but you tell your teacher about it when you
be absent from class.
4. A: Hey! Can I look at your book
B: Shh, we talk quietly in the library.
5. A: Can you put on your seat belt We wear one
when we're in a car.
B: Sure. Thanks!
Complete the sentences using can, have to / must, or can't / mustn' t.
have to/must
have to/must
have to
/must
have to/must
have to/must
can't
can
Look at the first sign and read the rules. Then write the rules for the
other signs.
park
take photos
swim
feed birds
Phrases
jump the queue
be absent from class
feed the dog
Phrases
talk quietly in the library
put on the seat belt
Complete the sentences using can, have to / must, or can't / mustn't.
3b
1. Don’t jump the queue. You ______________ wait your turn.
2. I ______ feed my dog many kinds of food, but I ______________ give him chocolate. It is bad for him!
3. A: Can I leave the classroom if I don't feel well
B: Yes, but you _____ tell your teacher about it when you _________ be absent from class.
4. A: Hey! Can I look at your book
B: Shh, we ______________ talk quietly in the library.
5. A: Can you put on your seat belt We ______________ wear one when we're in a car.
B: Sure. Thanks!
have to / must
can
can’t / mustn’t
have to
can
have to / must
have to / must
Look at the first sign and read the rules. Then write the rules for the other signs.
3c
Don’t park.
No parking.
You can’t / mustn’t park.
Don’t take photos.
No photos.
You can’t / mustn’t take photos.
Look at the first sign and read the rules. Then write the rules for the other signs.
3c
Don’t swim.
No swimming.
You can’t / mustn’t swim.
Don’t feed the birds.
No feeding.
You can’t / mustn’t feed the birds.
In groups, brainstorm three rules for one of the places below.
3d
library school dining hall park cinema hospital
In the library, we must keep quiet.
We mustn’t make noise.
We can’t bring food to the library.
We can’t talk loudly in the library.
We have to return the books on time.
…
Then draw signs to show the rules. Share your signs in class and explain what they mean.
3d
1. Memorize the new words and phrases.
2. Talk about the rules with your partners by using modal verbs and imperative sentences.
3. Finish the exercises.
Homework
Thanks for listening!

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