情态动词配套PPT-高考英语-语法课件.pptxVIP

• 第一章 can和must • 一、 can—— 下面是can的几种基本用法，请根 据例句和分类模仿写出至少两个例句。 • 1.表能力 • A computer can’t think for itself. • 2.表请求和允许 • Could/Can I come to see you tomorrow? • Yes, you can. (不能用could回答) 1 . 3.表客观可能性(用在肯定句中) . Sometimes the dog can be dangerous. . 如： Harvest and Thanksgiving festivals can be very happy events. . 再如： Little Jimmy can be very naughty sometimes. . 4.表示猜测(用于否定、疑问和感叹句中) . The phone is ringing. But who can it be? . It can’t be Jenny. She has gone home already. 2 • Think: how to translate “can not...too...” • 例1: We cannot be too careful of health. • 我们无论如何注意健康也不为过。 • 例2:你开车时再小心也不过分。 • You cannot be too careful when you drive a car. • 例3:我们必须尽力忠于职守。 We can not be too faithful to our duties. • can not/never...too..., cannot/never----over” • 再……也不过分,应尽量，越---越好 • 环保的重要性无论如何强调也不过分。 • The importance of environmental protection can not be over emphasized. 3 3 . 二、 must—— 下面是must的几种基本用法，请 根据例句和分类模仿写出至少两个例句。 . 1、肯定表示必须，否定表示禁止 . You must come in time. . Your mother is asleep, so you mustn’t make any noise. . --Must/Need we finish all the work in class? . --Yes, you must/have to. . --No, you needn’t/ don’t have to. . 翻译这个句子：只要你努力，你一定成功！(注 意母语对翻译的影响) . You will succeed as long as you work hard. . will --- 一定会 must ---一定要 4 . 2、表示推测(只用于肯定句，用于此含义时， 它的否定形式为can’t) . This must be your pen. . 否定句为： This can’t be your pen. . 3、用于must not always be doing sth，表示“ 不要老是……” . If you really want yourself to be in good health, you mustn’t always be smoking so much. 5 . 4、用于疑问句或if条件句，表示“非得”；“偏要” . Must you go now? Can’t you stay for a little while? . 如： Must you talk so loudly? Can’t you just quiet down? . 又如： If you must know, I can tell you. 6 • Key to the exercise. • Key: 1-5 CCBCB; 6-10 CBDBA; 11-15 BCBDA; 16-20 BCBDD; 21 C 7 • 第二章 will和shall, should • 下面我们来看一下will和shall的其他一些用法。 • Will • 1.will的过去式would可表示过去反复发生的动 作、习惯或倾向。有时可以跟usedto互换。 • When I was young, I