资源简介

(共39张PPT)
1
1
Unit 2 Transportation
祈使句
Imperative sentence
Learning Objectives
1.What is an imperative sentence
2.The functions and structures of imperative sentences.
What does this picture say
Stand up.
What does this picture say
Sit down.
What does this picture say
Be quiet.
What does this picture say
Be careful .
What does this picture say
Don’t eat here.
What does this picture say
Don’t drink and drive.
What does this picture say
Don’t be late.
Don’t be angry with me.
What does this picture say
What does this picture say
No smoking.
What does this picture say
No swimming.
1. Stand up.
2. Sit down.
3. Be quiet.
4. Be careful with the wet floor.
5. Don’t eat here.
6. Don’t enter.
7. Don’t be late.
8. Don’t be angry with me.
9. No smoking.
10. No swimming.
What does this picture say
No entry.
entry进入
What does this picture say
No photos.
1. Stand up.
2. Sit down.
3. Be quiet.
4. Be careful .
5. Don’t eat here.
6. Don’t drink and drive.
7. Don’t be late.
8. Don’t be angry with me.
9. No smoking.
10. No swimming.
What are they
祈使句
11. No entry.
12. No photos.
表示命令、请求、劝告、警告、禁止等语气的句子。
祈使句的定义
请求
Please help me.
Open the window, please.
命令
Stand up.
Be quiet.
Stop talking!
劝告
Don't eat too much junk food.
Be careful with the wet floor.
Always wear a helmet when riding a bike.
禁止
No swimming!
No photos!
No littering!
警告
Don't disturb him.
Don't sleep in the class!
表示命令、请求、劝告、警告、禁止等语气的句子。
祈使句的定义
1. Stand up.
2. Open the window, please.
3. Be quiet.
4. Be careful with the wet floor.
①主语？
②谓语？
Read and Observe
Read and Observe
1. (You) Stand up.
2. (You) Open the window, please.
3. (You) Be quiet.
4. (You) Be careful with the wet floor.
①主语
②谓语(原形)
祈使句的特点
①主语
常省略主语第二人称you。
因为命令的执行对象就是听者本身。
②谓语
常以谓语动词原形开头。
Be动词的原形为“be”
祈使句的类型
1.Do型：动词原形+（宾语）+其他成分
e.g. Forgive me！请原谅我！
2.Be型：Be+表语（名词或者形容词）+其他成分
e.g. Be a good girl！做一个好孩子！
3.Let型：Let+宾语+动词原形+其他成分
e.g. Let me help you！让我来帮你吧！
4. No型：No+名词/动名词
e.g. No smoking！禁止抽烟 No fishing!禁止钓鱼！
祈使句的类型
Do型祈使句
肯定：动词原形+其它
Come in!
否定：在句首加don't
Don't come in!
祈使句的类型
肯定： Be+表语 (名词或形容词) + 其它成分
否定：在句首加don't
Be quiet in the library.
Don't be late for class.
3.let型祈使句
肯定：Let +宾语+动词原形 +其它成分
否定：
Don't let +宾语+动词原形 +其它成分
Let +宾语+not+动词原形 +其它成分
Let's go!
Don't let him go.
Let's not go there.
祈使句的类型
4. No型：No+名词/动名词
注意：
“No+名词/动词 ing形式”表示禁止或规劝，常用于公共场所。
No photos! 禁止拍照！
No smoking！ 禁止吸烟！
05
Language Practice
Exercise
一.单项选择
1. ______ with fire. It’s very dangerous.
A. Playing 　 B. Play
C. Don’t play D. Doesn’t play
2. your hands,please.
A. Washing　　B. Wahes 　 C. Wash 　
3.Mary, ______ in bed.
A. not read B. don’t read
C. no reading D. doesn’t read
4. _____talk in the reading room.
A. Don't
B. Not
C. No
5. Let's_____sports.
A. to play
B. play
C. plays
D. playing
Look at the first sign and read the rules.
Then write rules for the other signs.
Don’t park
Don’t take photos
Don’t swim
看以下标志，将其与对应的指令相匹配。
Look and match.
1) Be careful with the wet floor.
2) Please don’t knock on the door.
3) Wash your hands properly.
4) Do not enter.
A
B
C
D
C
B
D
A
Don't let sb. do sth.!
Let sb. not do sth.!

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