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1、情态动词,情态动词,表示推测,不表示推测,can could may might shall should must will would ought to,have to dare (darent) need (neednt) used to,情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语 只作情态动词的 can/could, may/might, ought to， must 可情态可实义的 need, dare/dared 可情态可助动词的 shall/should, will/would 相当于情态动词的 have to, used to,I can/
2、 am able to swim. I could/ was able to climb a tree when I was a child. I will be able to swim next week. The fire spread through the hotel very quickly but everyone was able to get out.,can 表示现在的能力,could表示过去的能力,be able to 表能力，可用于多种时态,be able to 强调成功地做了某事,情态动词表能力,shall 用于第一、三人称, 征求对方意见。 e.g. Shall w
3、e begin our class? Shall he go now? 2. 用于提出命令、允诺，或用于法律、规定 e.g. You shall get my book on Sunday. He shall leave the house at once. The sign reads: No person shall smoke here!,shall will、would,情态动词表请求、允许,will would 1. 用于向第二人称，征求对方意见。 e.g. Would /Will you please open the door? 2. 表示个人主观意愿; 临时的决定。 e.g.
4、I will help you anytime. -The light is on. -I will go and turn it off. 3. would 表示“过去常常”； used to do“过去常常，强调现在不了”,1. When he was there, he _ go to that coffee shop at the corner every day. A. would B. should C. had better D. might 2. Whats the name of the book? Khulaifi. _ I spell it for you? A. Sha
5、ll B. Would C. Can D. Might,must 表“必须” dont have to neednt do dont need to 2. must还可表示“偏偏、偏要” e.g. Must you make so much noise?,1. 不必须,mustnt 禁止,must need,情态动词表必要性,You _ buy a gift, but you can if you want to. must B. mustnt C. have to D. dont have to 2. When I was young, I was told that I _ play wi
6、th fire. A. wouldnt B. neednt C. mustnt D. darent 3. - May I smoke here ? - If you _, choose a seat in the smoking area. A. should B. could C. may D. must,should / ought to表示推测 根据经验的推测，“应当、应该” e.g. You photos should be ready by 12:00. 2. should 表示“竟然”，带有感情色彩。 e.g. It is strange that you should like
7、him.,情态动词表推测,can /could 表示推测 1. 常用于否定句或疑问句。 e.g. You cant be hungry already you had lunch only two hours ago! 2. can用于肯定句中表示理论上的可能性，或客观可能性 e.g. You can hurt yourself if you play in the street. The World Wide Web is jokingly called the World Wait Web because it sometimes can be very slow.,may/ might表
8、示推测 1. can not 不可能 may not 也许不，可能不 2. may/ might as well “不妨” e.g. You may as well stay for dinner.,1. That be Anns husband, for I am sure that he doesnt wear glasses. A. cant B. may not C. mustnt D. neednt 2. - Good morning. I got an appointment with Miss Smith yesterday. - Ah, you _ be Mr. Peter.
9、A. might B. must C. would D. can,3. What do you mean, there are only ten tickets? There _ be twelve. A. should B. would C. will D. shall 4. It is usually warm in my hometown in March, but it _ be rather cold sometimes. A. must B. can C. should D. would,5. Although this _ sound like a simple task, gr
10、eat care is needed. A. must B. may C. shall D. should,must have done cant have done 3. might/may have done,情态动词+have done： 1. 表示对过去发生的事进行推测,一定做了,不可能做了,本可以做,本该做，而没做,本不必做，而做了,可能做了,could have done should have done neednt have done,2. 表示对过去所做的事情的虚拟,1. - She looks very happy. She _ have passed the exam.
11、- I guess so. Its not difficult after all. A. should B. could C. must D. might 2. She _ have left school, for her bike is still here. A. cant B. wouldnt C. shouldnt D. neednt,3. - Im sorry. I _ at you the other day. - Forget it. I was a bit out of control myself. A. shouldnt shout B. shouldnt have s
12、houted C. mustnt shout D. mustnt have shouted,4. You _ the exam, but you spent all your time playing. A. can pass B. could have passed C. could pass D. can have passed,高考题,- Excuse me, but I want to use your computer to type a report. - You _ have my computer if you dont take care of it. A. shant B.
13、 might not C. neednt D. shouldnt Lucy doesnt mind lending you her dictionary She_. Ive already borrowed one. A.cant B. mustnt C. neednt D.shouldnt Some aspects of a pilots job _ be boring, and pilots often _ work at inconvenient hours. A. can; have to B. may; can C. have to; may D.ought to; must,A,C
14、,A,A. shant B. cant C. neednt D. mustnt You dont have to know the name of the author to find a book. You _ find the book by the title. must B. need C. can D. would Its the office! So you _ know eating is not allowed here. Oh, sorry. A. must B. will C. may D. need,A,B,C,The biggest problem for most plants, which _ just get up and run away when threatened, is that animals like to eat them.,You _ buy a gift, but you can if you want to. must B. mustnt C. have to D. dont have to - No one _ be compared with Yao Ming in playing basketball. -
