人教版七年级英语下册Unit 4 Don't eat in class. 祈使句课件

1、UnitFour人教版七年级下册人教版七年级下册 Dont eat in class.Imperative sentence 祈 使 句1Come in !3Let me help you.2Stand up, please!4No 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。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,

2、 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DontDontDontOpen the door , please!Dont open the door , please!Go along this way, you will find it！Dont go along this way, you

3、will find it！Wash your hands, please!Dont wash your hands, please!要点：在句首加DontBe 型祈使句的否定DontDontDontBe quiet, please!Dont be quick, please!Be quick, please!Dont be careful, please!Be careful, please!要点：在句首加DontDont be quiet, please!Let 型祈使句的否定 notnotnotLet me help you !Dont let me help you !Let me he

4、lp you !Let him go!Let him go!Dont let him go!Let us clean the room!Let us clean the room!Dont let us clean the room!要点有二：1、在句首加Dont 2、do not do No 型祈使句No +No +No +No +或或形式表示禁止，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 wont you否定祈使句

5、，反义疑问句部分用will youe.g. Open the radio, will you? 或 wont you?Dont open the radio, will you?注意：Lets 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 youe.g. Lets go home, shall we? Let us go home, will you? Practice 1. Lets _swimming this afternoon. A.not go B. not to go C. no goA 2. Kate, _ your homework now. A. does B. do C. is doingB 3. Listen to muisc in the classroom.(变否定句）变否定句） _ _ to muisc in the classroom.Dont listen 4. Lets walk to school.(变否定句）变否定句） Lets _ _to school.5. Read after me, _ _?(反义疑问句）反义疑问句）6. Lets have dinne