Modal verbs 表示说话人的语气 没有人称和数的变化 basic modal verbs 基本情态动词 Unit 1 can could may might must shall should will would Unit 2 ought to need dare

Can ability permission Can _____you speak English ? Learn Modal Verbal 学一学 Can _____you speak English ? Man _________live without air. cannot ability Can 指有能力做某事,意为”能够” permission 表示请求,允许 Can I smoke here ? Perhaps we can go out for a walk.

can / could 与 be able to 的区别 表示请求更加委婉 He could swim when he was 5. Could you lend me some money ? 考点 can / could 与 be able to 的区别 be able to 表示”某事已做成功” The fire spread fast, but everyone in the hotel was able to get out.

cannot help + 动名词 忍不住做某事 cannot too “无论怎么样..也不为过,越…越好 On hearing the story , I cannot help laughing . You cannot be too careful with them. cannot help + 动名词 忍不住做某事 cannot too “无论怎么样..也不为过,越…越好

It is usually warm in my hometown in March but it __ be rather cold sometimes. （2008福建） A. must B. can C. should D. would 2. You ___ be hungry already---you had lunch only two hours ago! （2008浙江） A. wouldn’t B. can’t C. mustn’t D. needn’t 3. My MP4 player isn’t in my bag. Where ____ I have put it? (2007福建） A. can B. must C. should D. would Have a try

may 和 might May I smoke here? Can I smoke here ? May 表示可能性,用于推测,暗指不确定 用may I …征询对方许可,在文体上比较正式. 但在日常口语中,特别在现代口语中,用can I ..征询对方意见更为常见. May I smoke here? Can I smoke here ? May 表示可能性,用于推测,暗指不确定 He may know Tom’s address. He may be waiting for you at the station. They may have got lost.

考点 当句中出现” I am afraid, I am not sure” 等表示不确定 含义的时候,常选用may 和might . I may go, but I am not quite sure. I am afraid he might not come to attend the meeting today. 从语气上判断,may 所表示的可能性比might 大一点, 而might 表示较多的怀疑. He may be very busy now. (可能性较大）． He might be very busy now. (可能性教小）．

Test yourself 测一测 Are you coming to Jeff’s Party ? I’m not sure. I ____go to the concert instead. A. must B. would C. should D. might I thought you __like something to read, so I have brought you some books. A. may B. might C. would D. must

Will 和would will would 表示意愿，愿望，决心 I will never do that again. I will do all I can to help you. 表示过去反复发生的动作， 或表示谦恭的请求． would During the vacation, he would visit me every week. Would you please tell me the way to Wenzhou Overseas Chinese Hotel ?

“Write to me when you get there. “ _____”. Do exercises. 练一练 “Write to me when you get there. “ _____”. I must B. I should C. I will D. I can When he was there, he ____go to that coffee shop after work. would B. should C. had better D. might

Shall 和should Shall I dance with you ? Shall he start at once? You shall fail if you don’t work hard. (警告）　 He shall be punished. (威胁） 用于法律，条约，规章，等文件中，无论主语人称如何 一律用shall Each student shall arrive at classroom before 7:05 in the morning.

考点 should 表示劝告，建议，起同义词是ought to 表示义务，指应该做，且有道义上的责任． 　　　　表示期待，用于表达合理的推断或明显的结果 You should go to class right away. It is 3 o’clock, the football game should begin soon. I should help him because he is in trouble. 考点 Should 表示惊讶，忧虑，惋惜，　意思“竟然，竟会”常用在 I’m surprised, it’s a pity, you cannot imagine 等结构中． It is a pity you should be so careless. I am surprised she should have done such a thing.

must表示推测 Must 和 have to 考点 We mustn’t ____________________in class. I must study hard, because _________________. I have to study hard, because _______________. We mustn’t ____________________in class. We mustn’t ____________________in dormitory. 考点 must表示推测

________________________ must用在肯定句中表示较有把握的推测，意为“一定”。 2) must表对现在的状态或现在正发生的事情的推测时， 　 must 后面通常接系动词be 的原形或行为动词的进行式。 他现在肯定呆在那里。 ________________________ He must be staying there. 3) must 表示对已发生的事情的推测时，must 要接完成式。 I didn't hear the phone. I _______________________ (我刚才没有听到电话，我想必是睡着了。) must have been asleep

Test yourself 测一测 I mustn’t B. I can’t C. I needn’t D. I won’t Coco, you _____play with the knife, you ____hurt yourself. won’t; can’t B. mustn’t ; may C. shouldn’t ; must D. can’t ; shouldn’t ---Will you stay for lunch ? ---Sorry , _____. My brother is coming to see me . I mustn’t B. I can’t C. I needn’t D. I won’t

A. might B. will C. must D. can --Excuse me. Is this the right way to Wenzhou Middle School? --Sorry. I am not sure. But it _____be. A. might B. will C. must D. can Look, it _____be Coco. No, it _____be him. He has gone abroad. may, mustn’t B. must, may not C. must, can’t D. can, may not