Unit 4 Don't eat in class. 祈使句课件14张

(共14张PPT)
Unit
Four
人教版七年级下册
Don’t eat in class.
概 念
用 法
肯定、否定及回答
种 类
Imperative sentence 祈 使 句
1
Come in !
3
Let me help you.
2
Stand up, please!
4
No smoking!
感知祈使句
祈 使 句
祈使句 是表示请求、命令、建议、禁止等的句子。
祈使句 通常省略主语“you”,谓语动词一律用原形。
祈使句的句末一般用感叹号或句号。
有时会在句首或句末加please,使语气显得更加客气。
语调：读降调。
否定祈使句
祈使句
肯定祈使句
Be型
Do型
Let型
Do型
Be型
Let型
No型
肯定祈使句
Listen to me,please!
Go along this way, you will find it!
Wash your hands, please!
Be quiet, please!
Be quick, please!
Be careful, please!
Let me help you !
Let him go!
Let us clean the classroom!
Do 型
Be 型
Let 型
Do 型祈使句的否定
Don’t
Don’t
Don’t
Open the door , please!
Don’t open the door , please!
Go along this way, you will find it！
Don't go along this way, you will find it！
Wash your hands, please!
Don’t wash your hands, please!
要点：在句首加Don’t
Be 型祈使句的否定
Don’t
Don’t
Don’t
Be quiet, please!
Don’t be quick, please!
Be quick, please!
Don’t be careful, please!
Be careful, please!
要点：在句首加Don’t
Don’t be quiet, please!
Let 型祈使句的否定
not
not
not
Let me help you !
Don’t let me help you !
Let me help you !
Let him go!
Let him go!
Don’t let him go!
Let us clean the room!
Let us clean the room!
Don’t let us clean the room!
要点有二：
1、在句首加Don’t
2、let sb.do sth.
let sb.not do sth.
No 型祈使句
No +可数名词复数
No +不可数名词
No +动词的ing
No +可数名词复数或不可数名词或动词的ing形式
表示禁止，是一种警示语，常用于公众场所，禁止公众做某事。
No photos!
No food!
No parking!
No swimming!
No smoking!
祈使句的反义疑问句
肯定祈使句，反义疑问句部分用will you 或 won’t you
否定祈使句，反义疑问句部分用will you
e.g.
Open the radio, will you 或 won’t you
Don’t open the radio, will you
注意：Let’s 结构和Let us结构的反义疑问句部分不同，
Let ’ s 用 shall we
Let us 用 will you
e.g.
Let’s go home,
shall we
Let us go home,
will you
Practice
1. Let’s ______swimming this afternoon.
A.not go B. not to go C. no go
A
2. Kate, ______ your homework now.
A. does B. do C. is doing
B
3. Listen to muisc in the classroom.(变否定句）
_____ _____ to muisc in the classroom.
Don't listen
4. Let’s walk to school.(变否定句）
Let’s ____ ______to school.
5. Read after me, _____ _____ (反义疑问句）
6. Let’s have dinner now, ____ _____(反义疑问句）
not walk
will you
shall we
won't you
祈
使
句
祈使句的概念
祈使句的类型
祈使句的反义疑问句
Summary
Thank
You