Unit 4 Don't eat in class. Section A Grammar Focus-3c课件(共24张PPT)2022-2023学年人教版七年级下册英语

(共24张PPT)
Don’t eat in class.
Unit 4
SectionA Period 3 (Grammar Focus-3c)
1.To learn rules at school and in the school library.
2.To learn imperative sentence structres(祈使句句型)：
1) Come here,please.
2)Be quiet.
3)Let's go to school.
4)Don't fight.
5)No talking.
3.To learn to use have to/must, can and can’t
Learning aims 1'
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.
Grammar Focus
Task 1: Grammar Focus. 10'
Guide：Read freely
Check 1: Read together. 4'
1. 不要在楼道里跑。
_________ in the hallways.
2. 不要打架。
_______________
3. 有什么规则？
_____________rules
4. 我们必须按时上课。
___________on time for class.
Check 2:阅读Grammar Focus，完成下列句子。6'
Don’t fight.
Don’t run
What are the
We must be
5. 我们可以在教室里吃东西吗？
Can we eat _______________？
6. 不能。但我们可以在餐厅里吃东西。
______________________________
______________________________
7. 我们可以在上课的时候带帽子吗？
_______wear a hat in class
Can we
No, we can’t, but we can eat in the dining hall.
in the classroom
8. 他在学校里必须穿校服吗？
Does he have to____________________
9. 是的，必须。/ 不，不必。
_______________________________
10. 你们必须做什么？
_______________________________
11. 在图书馆里我们必须保持安静。
We have to____________________.
Yes, he does. / No, he doesn’t.
wear a uniform at school
What do you have to do
be quiet in the library
1.定义：祈使句是表示请求、命令、建议等的句子。句子中通常不出现主语，谓语动词一律用原形。根据句子语气的强弱，句末用感叹号或句号。
Task 2 Presentation 祈使句 8'
2.句式
一、祈使句的肯定式
1. 以行为动词原形开头，简称Do型。
e.g. Come here. 到这儿来。
2. 以动词be开头，简称Be型。
e.g. Be quiet, please. 请安静。
3. 以Let开头，简称Let型。
e.g. Let’s go! 咱们走吧!
注意：
有时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；如果放句首，则不用。
e.g. Go this way, please. 请这边走。
二、祈使句的否定式
1. Do型和Be型的否定式是在句首加don’t。
e.g. Don’t sit here. 不要坐在这儿。
Don’t be late. 别迟到。
2. 以let开头的祈使句，其否定式有两种：
一种是直接在句首加don’t，另一种是
“let + 宾语 + not +动词原形+ (其他)”。
e.g. Don’t let him go. 不要让他走。
Let’s not go there. 咱们别去那儿。
注意：
“No+名词/动词 ing形式”表示禁止或规劝，常用于公共场所。
e.g. No photos! 禁止拍照！
No smoking！ 禁止吸烟！
Check:将下列句子翻译成英语。 3'
1. 请看这幅图画。
Look at the picture, please.
2. 不要在教室里跑。
in the classroom.
3. 让我们帮助他。
Please look at the picture.
Don’t run
Let’s help him.
4. 在图书馆保持安静。
in the library.
5. 上课不要迟到。
for class.
Be quiet
Don’t be late
Library Rules
Don’t talk.
________________
________________
________________
Task 3: Finish 3a and 3b 5'
Guide 1: 3a Write the rules for the school library.
Check:
Don’t listen to music.
Don’t eat or drink.
Don’t take photos.
方法指导：
1. 由图示可知都是一些禁止类的祈使句。
2. 可知应用“Don’t + 动词原形”句子。
Be quiet (she/have to /in the library)
Q: Does she have to be quiet in the library
A: Yes, she does.
Guide 2:3b Use the words to make questions about the rules. Then write answers according to your school.
For example:
1. 根据例句，可知要求我们造一般疑问句并根据实际情况进行回答。
2. 先确定句子的主语。
3. 再确定用情态动词还是用助动词来构成疑问语序。
4. 根据实际情况做出肯定或否定回答，答语的主语要与问句保持一致。
方法指导
2. Eat (he/have to/in the dining hall)
Q: ________________________________
A: _____________
3. Listen to music (we/can/in the hallways)
Q: ________________________________
A: _____________
4. Wear a hat (we/can/in the classroom)
Q: _____________________________
A: ____________
Check:
Yes, he does.
Does he have to eat in the dining hall
Can we listen to music in the hallways
No, we can’t.
Can we wear a hat in the classroom
No, we can’t.
一、用所给单词的适当形式填空。
1. Don’t ________(listen) to music in the
library.
2. Do we have to ________(clean) the room
every day
3. You can’t ________(wear) sunglasses in
the classroom.
4. Please ________(arrive) at school on
time (准时).
5. John is often late for _______ (class).
class
listen
clean
wear
arrive
Classwork 8'
1. He has to eat breakfast quickly. (改为一般疑问句)
_________________________________
2. Play volleyball after class. (改为否定句)
________________________________
三、句型转换。
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. (改为同义句)
_______________________________
5. Eric has to do his homework before six. (对划线部分提问)
______________________________
Can we wear sports shoes in class
We must be on time for class.
What does Eric have to do before six
四、单项选择
( ) 1.Please look outside.Look at the blackboard.
A. not B. aren't C. don't D. can't
( )2.John is a lazy boy.He often for class.
A. gets to late B.arrives late
C.arrive in late D.arrive at late
( )3.We can't listen to music in the hallways, we can listen to it outside.
A. and B. so C. but D. or
( )4.Sorry,you play basketball in the classroom.
A. can't B. mustn't C. don't D. don't have to
C
B
C
A
( )5.---Must I clean the room now
----No,you . You can do it later.
A .don't have to B.shouldn’t C .can't D. mustn't
( )6. There are no buses or taxis here,so she walk home.
A.have to B.may C.can D.has to
( )7.---Don't eat in class,Hu Lei!
---- ,Miss Zhang.
A.Excuse me B.Sorry C.No problem D.That's OK.
A
D
B
Homework
1. Write down ten sentences about
what you can or can’t do in your house.
We can’t eat in bed.
We can’t fight.
2.Finish练习册 Unit 4 第二课时.
Thank You!