Unit 4 Don't eat in class. SectionA GrammarFocus-3c课件(共24张PPT)

(共24张PPT)
Unit 4 Don’t eat in class.
Section A Grammar Focus-3C
Don't run in the hallways. Don't fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can't, but we can eat in the dining hall.
Can we wear a hat in class Yes, we can. / No, we can't.
Does he have to wear a uniform at school Yes, he does. /No, he doesn't.
What do you have to do We have to be quiet in the library.
一、祈使句的用法
①用于表达命令、请求、劝告、警告、禁止（最常表达命令）
②通常都省略主语（因主语一般是第二人称）
③开头动词都为原形
Go and wash your hands. 去洗你的手。(命令)
Be quiet, please. 请安静。(请求)
Be kind to your sisters. 对妹妹要和善。(劝告)
Look out! Danger! 小心！危险！(警告)
Keep off the grass. 勿践踏草坪。(禁止)
二、祈使句的句子结构
(1) 肯定句：__________+ 其他
在餐厅里吃东西。
________________________________
在音乐教室里听音乐。
________________________________
骑自行车去上学。
_________________________________
Ride the bike to school.
Eat in the dining hall.
动词原形
Listen to music in the music room.
(2) 否定句: _____ + _________+ 其他
不要和同学们打架。
_________________________________________
不要在教室里打篮球。
_________________________________________
二、祈使句的句子结构
Don’t fight with your classmates.
Don’t play basketball in the classroom.
Don’t 动词原形
(3) 以let引起的句子 _____+ sb.+ 动词原形
让我们步行去上学吧。 _______________________
(4) No + doing，表“禁止、规劝”
禁止停车！No Parking.
禁止吸烟！No Smoking.
二、祈使句的句子结构
Let
Let’s walk to school.
1. —How can I avoid the illness, Sir
—______ a mask(口罩) when going out and wash hands with soap.
A. Wears B. Wear C. To wear
2. Daniel, ____ play with the mobile phone while you're walking in the street.
A. don't B. doesn't C. won't D. can't
3. — ____ on the TV, Jim. I’d like to watch the news.
—OK, Dad.
A. Turn B. Turns C. Turning D .To turn
4. Please _____ your exam papers once again before
handing them in.
A. going over B. went over C. go over D. to go over
3. —Let’s _______chess.
—Good idea!
A. play B. to play C. playing D. played
4. Let’s ______a noise. Someone is sleeping.
A. not make B. no making C. not to make　
let sb. not do sth. 让某人不做某事
let sb. do sth. 让某人做某事
Do you know the rules for the school library
3a Write the rules for the school library.
Library Rules
1. Don't talk.
2. ____________________
3. ____________________
4. ____________________
Don't eat or drink.
Don't listen to music.
Don't take photos.
__________________
3b Use the words to make questions about the rules. Then write answers according to your school.
Be quiet
Q: Does she have to be quiet in the library
(she/have to/in the library)
A: Yes, she does.
1. 造一般疑问句，根据实际情况进行回答
2. 确定用情态动词还是用助动词来提问
小提示
Eat
Q: ___________________________________
(he/have to/in the dining hall)
A: _____________________
Listen to music
Q: ____________________________________
(we/can/in the hallways)
A: _____________________
Does he have to eat in the dining hall
Yes, he does.
Can we listen to music in the hallways
No, we can't.
Wear a hat
Q: ____________________________
(we/can/in the classroom)
A: __________________
Can we wear a hat in the classroom
Yes, we can.
一、根据句意，用can和can’t填空。
1. Mr Green______ smoke here because there’s a sign on the wall. It says “No smoking.”
2. It’s very hot outside. You _____ wear a hat.
3. We _____ eat in the classroom because it’s impolite to teachers.
4. I ______ go to bed after 11:00 on school night.
5. The students ____ read books in the library.
can’t
can
can’t
can’t
can
二、用have to或has to填空。
1.We ________ clean our classroom after school.
2.She _______ make her bed after getting up.
3.It’s late. Mr Beckman ______ go to work by car.
4.Emily and Peter join a music club. They _______ practice the guitar every day.
have to
have to
has to
has to
1. All the students_______ know cheating(抄袭) in the exam is not allowed.
A. need B. may C. must D. can
2. ________on the grass(草), or it will “cry”.
A. To walk B. Not to walk
C. Walk D. Don’t walk
三、单项选择
3. She doesn’t have to _______the dishes.
A. washing B. washes C. to wash D. wash
4. Bob can’t go swimming with us because he ____ help
with the housework at home.
A. have to B. has to C. must not D. shouldn’t
5.—Must I do the dishes now
—No, you________ .
A. mustn’t B. don’t have to
C. may not D. can’t
注意：回答must引起的问句时，肯定用must，否定用
don’t have to或needn’t (不必) , 不能用mustn’t (禁止) 。
四、句型转换
1. He has to eat breakfast quickly. (改为一般疑问句)
__________________________________
2. Play volleyball after class. (改为否定句)
________________________________
Does he have to eat breakfast quickly
Don’t play volleyball after class.
3. We can wear sports shoes in class. (改为一般疑问) ______________________________
4. Don’t arrive late for class. (用on time改为同义句)
_______________________________
5. Eric has to do his homework before six. (划线部分提问)
___________________________________
Can we wear sports shoes in class
You must be on time for class.
What does Eric have to do before six
3c Make up five cool rules(五个很酷的规定) for your dream school. Share your rules with the class. Your classmates vote(投票) for the Coolest School!
1. We can eat in class.
2. We don't have to come to school every day.
3....
Thanks for Listening