九年级英语上册 Unit 3 Safety单元语法归纳 （新版）冀教版课件

1、单元语法归纳 祈使句主要用来表达请求、命令、建议、叮嘱或祝愿等。祈使句通常省略主语(you),但为了加强语气有时可以加上主语you或增加称呼。1.行为动词开头的祈使句。Sit down.坐下吧!2.Be开头的祈使句,后常加形容词。 Be careful! 当心!3.Let.开头的祈使句。 Let me carry the box for you. 让我替你拿这个箱子吧! Lets+动词原形表建议,让我们 Lets go fishing this Sunday. 让我们这个周日去钓鱼。 Lets=Let us,但不同语境有不同的含义。 Lets“请让我们(咱们)”,包括谈话的对方。 Let us

2、意为“请让我们”,表示希望得到对方允许,不包括对方。4.祈使句的否定式。 行为动词和Be开头的祈使句,在句首加dont。Dont be late for school.上学别迟到。 Lets 的否定式可以有两种:Lets not+动词原形或Dont lets+ 动词原形。 Lets not think about it.我们别想这事了。 Dont lets think about it.5.祈使句的反意疑问句。 以行为动词或系词be或keep开头的祈使句,如果是肯定形式,后加will you或wont you构成。 Listen to me carefully, will you(wont y

3、ou)? 如果祈使句是否定形式,常用will you。 Dont speak so fast, will you?别说那么快,好吗? Lets构成的祈使句,包括谈话双方,用shall we。 Lets go for a walk, shall we? 让我们出去散步,好吗? Let us构成的祈使句,不包括对方,请求对方允许,用will you。 Let us go there now, will you? 让我们去那儿吧,好吗?注: (1)祈使句中常加do或always来加强肯定的语气,用never来加强否定 的语气。Do be quiet a moment.务请安静一会儿。Always r

4、emember all your father has said, and be a good boy.要永远记住你爸爸的话,做一个好孩子。Never trouble trouble till trouble troubles you.麻烦不来找你,千万别去找麻烦。(2)祈使句中常加上please,表示礼貌,更客气。please可以放句首,也可以放句尾。放句末时要用逗号分开。Please open the door.=Open the door, please.一、填词完成反意疑问句1.Let us do the jobs by ourselves, ?2.Do the homework by

5、 yourselves, ?3.Lets enter the hall, ?4.Dont talk too much, ?5.No smoking, ?will youwont you/will youshall wewill youwill you二、单项选择( )6.“ run in the hallways,Mike.”“Sorry,Ms.Clark.”(2014贵阳) A.Dont B.Please C.Lets( )7.Please help me carry it, ? A.will I B.will you C.shall ID.shall we( )8.Dont make so

6、 much noise, ? A.will you B.wont you C.shall we D.do you( )9.Kate, your homework here tomorrow. A.bring B.brings C.to bringD.bringing( )10.Im leaving for Xisai Mountain this afternoon. you have packed everything. (2014黄石) A.To be sureB.Been sure C.Being sure D.Be sureABAAD1.She can write as as her sister. 她能写的和她妹妹一样认真。2.Neither I nor my sister (study)at night. 我姐姐和我晚上都不学习。( )3.This morning I went to work in a hurry that I the bag at home. A.forgot B.left C.missedD.lost【教师备用】 carefullystudiesB易错提醒: 1.as.as中间加形容词或副词的原级,本句是修饰write,因此用carefully,不能用careful。 2.neither.n