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(共20张PPT)
Unit 2 No rules, no order
Section A Grammar Focus
Learning objectives
发现并总结祈使句和含有情态动词的句子中的动词的形态变化特点;
归纳和掌握祈使句的句式结构、意义和用法;
根据语境，正确运用情态动词 can、must、have to;
使用祈使句和情态动词谈论学习和生活中的规则。
在本节课结束后，我将能够：
Stand up.
Sit down.
Take a seat.
Open your book.
Raise your hands.
Clap your hands.
Use your pen.
I say, you do.
Game Time
Look at the blackboard
祈使句 (Imperative sentences)
/ m per t v/
祈使句Imperative sentences
命令
建议
祝愿
请求
警告
劝说
...
Help me, please.
Have fun.
Stand up.
No photos.
Let's start the party.
Don’t be sad.
加上please更礼貌，
句末句首都可以；
动原开头祈使句，
有do, 有be, 有let, 有No；
主语是you常省去
变否定，
句首don’t莫忘记。
祈使句句尾用句号或感叹号，读时用降调。
句末用please时，前面通常加逗号。
Read the sentences. Do the verbs in bold need to change forms Why
Walk in the hallway. Don’t run!
Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter.
Can we bring our phones to class No,we can’t. We must keep them in our lockers.
Can we eat snacks in class No,we can’t eat in class. We have to eat in the dining hall.
3a
Do型祈使句
Be型祈使句
Do 型
Be 型
Let 型
No 型
Wear your uniform.
Respect your teachers and classmates.
/r spekt/
Be kind to your friend.
Be quiet.
Let me try.
Let him play.
No photos.
No littering .
禁止拍照!
禁止乱丢垃圾!
Walk in the hallway. Don’t run!
Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter.
Can we bring our phones to class No,we can’t. We must keep them in our lockers.
Can we eat snacks in class No,we can’t eat in class. We have to eat in the dining hall.
情态动词can, must, have to 后面都接动词原形
Have a think:
1. 情态动词“can, must, have to ”在用法上有什么共同点？
2.情态动词 “have to”和其他情态动词在用法上有何区别？
3. have to和must有何区别？
have to有人称和数的变化。
have to“不得不”，为客观需要做的事情。
must“必须”，为主观的义务和必要。
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.
Complete the sentences using can, have to / must, or can’t / mustn’t.
have to / must
can
have to / must
have to
can’t
3b
jump the queue 插队
wait your turn 等待你的顺序
feed my dog 喂狗
leave 离开
be absent from 缺席
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
have to/must
quietly 安静地
put on the seat belt 系上安全带
Look at the first sign and read the rules. Then write the rules for the other signs.
Do not eat or drink.
No eating or drinking.
You can’t / mustn’t eat or drink.
3c
Do not park here.
No parking.
You can’t / mustn’t park here.
Do not take photos here.
No photos.
You can’t / mustn’t take photos.
park
take photos
Do not feed the birds.
No feeding the birds.
You can’t / mustn’t feed the birds.
swim
feed birds
Do not swim here.
No swimming.
You can’t / mustn’t swim here.
Don’t listen to music in the library.
Don’t eat in the library.
Don’t take photos in the library.
Library Rules
Don’t talk in the library.
No talking.
No eating/food.
No music.
No photos.
1. When someone doesn’t wait for his turn to get on the bus, we should say, “You !”
2. When we are in car, we .
3. There is a sign in the zoo. It reads, “ !”
4. You in the library.
5. You must tell your teachers when you .
Jump the queue be absent from class
put on the seat belt talk quietly feed animals
jump the queue
put on the seat belt
talk quietly
are absent from class
Don’t feed animals
1. You must wear a uniform at school.（改为否定句）
2. We can listen to music in the classroom.（改为一般疑问句，并作否定回答）
3. Don't talk in class.（改为同义句）
4. Peter get up early on Monday mornings.（必须
You mustn't wear a uniform at school.
You can’t listen to musc in the classroom.
No talking in clavss.
has to
5. We have to ______ (clean) the classroom everyday.
clean
No talking/noise!
Don’t talk/
make noise.
You can’t/mustn’t talk/make noise.
No smoking!
Don’t smoke.
You can’t/mustn’t smoke.
No food!
Don’t eat and drink.
You can’t/mustn’t eat and drink.
1. Make up five cool rules for your dream school.
Homework
2. Brainstorm three rules for one of the places below. Then draw signs to show the rules.

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