1、祈使句,概念和结构：祈使句是用来提出要求，建议或发出命令的句子。它的主语通常是第二人称you(常被省略掉），谓语动词是原形，句尾 是句号或感叹号。,祈使句可分为两种形式：,肯定形式和否定形式,1.肯定形式一般以动词原形开头。 Eg: Open the door,please. 2.否定形式是在句首谓语动词前加dont,有时也用Never. Eg: Dont be late for the class,please.Never say goodbye.,3.特殊情况下。主语是第一人称和第三人称时，表示建议做某事，通常用let来开头。 Eg: Let me put it away.Let her
2、come home !Lets go swimming!Let him walk fast.,4.除了可以用谓语动词来表示祈使句外，还可以用名词，形容词，副词等短语表示祈使句。 Eg: Just a moment.（名词短语）Quiet,please !(形容词短语）Faster!Faster!( 副词短语）,5.祈使句+or+简单句，表示.否则. 祈使句+and+简单句，表示就 Eg: Be quick,or well be late.走快点，否则我们要迟到的。Study hard,or you wont pass the exam.努力学习，否则你将考试不及格的。G o along the
3、 street,and youll see a post office.沿着这条街走，你就会看见一个邮局的。,6.一般疑问式的祈使句的如何表示：,1）主语是第一人称的时候，可以借助动词shall来表示。 Eg:Shall I go to a park this afternoon?Shall we read books together? 2）主语是第二人称的时候，可以借助助动词will来表示。 Eg: Will you help him?,1.Be careful！小心！ 2.Stand up/down.起立/坐下。 3.Be quiet. 安静！ 4. come here. 过来。 5.G
4、o there.去那里。 6.Go/by this way走这边. 7.Dont be late.别迟到。 8.Dont be noisy. 不要喧哗。 9.No smoking. 禁止吸烟。 10.No parking. 禁止停车。 11.Look out!小心 ！,7.表示祈使句的词组：,翻译下列各句,1.咱们一起玩吧! Lets play together! 2.请不要迟到. Dont be late. 3.回答这个问题. Answer this question. 4.我来打开窗户好吗?Shall I open the window ? 5.你和我们一起去好吗? Will you go
5、 with us ?,翻译下列句子(英译汉),1. Be sure to lock the door before you leave the room . 在你离开教室前务必要锁门！ 2.Lets go at once. 我们立即出发吧！ 3.Let me try again. 让我再试试。 4.Let Tom go there himself. 让Tom自己去那。,选择题：,1._ talk loudly in the reading room.A.Not B.Be not C.Dont D.Doesnt 2.Go down the street and turn _ right. The
6、 restaura is _ the left.A./;at B.to;to C./;on D.to;on 3.The sigh “No left turn” tells us “_”.A.Dont turn left B.Turn leftC.Go straight D.Turn right,C,C,A,4.-Sorry ,Joe.-Dont call me “Joe”,and _ you forget it!A.do B.didnt C.did D.dont 5.Stand over there, _ youll be able to see it better.A.or B.and C.
7、 but 6.Lose one hour in the morning._ you will be looking for it the rest of the day.A.but B.and C.or 7.Start out right away, _ you will miss the first train.A.and B.but C.or,D,B,C,C,8.Mary, _ here,everybody else stay where you are.A.come B.comes C.coming 9._ for the glass.It OK.Im wearing shoes.A.Look out B.Go out C.Walk out 10.Im sorry,Im late._.A.Dont be late next time.B.It doesnt matter. Im also late.C.Never mind.,A,A,A,
