1高考情态动词复习(学生版)情态动词的基本用法特点1） 情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。2） 情态动词 除 ought 和 have 外，后面只能接不带 to 的不定式。3） 情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。4） 情态动词没有非谓语形式，即没有不定式，分词，等形式。 1. 表示能力、许可的情态动词的用法。表示能力: can, could, be able to*be able to 能用于各种时态。can / could 只能表示现在或过去的能力。*was / were able to : “设法做成某事”相当于: managed to do sth. 或 succeeded in doing sth.。1. A computer _ think for itself; it must be told what to do.A. cant B. couldnt C. may not D. might not2. The fire spread through the hotel very quickly but everyone _ get out.A. had to B. would C. could D. was able to3. They will _ run this machine on their own in three months.A. can B. could C. may D. be able to表示许可: may / might, can / could * might, could 比较委婉, 一般多用于疑问句.* can, may 表达的语言比较随便.* 在以 could, might 表示征询对方意见或表示请求时，回答应相应使用 can, may.5. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should6. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. can 2. 表示否定的情态动词的用法:mustnt 不准, 禁止 neednt 没必要 ( = dont have to )cant 不能; 不可能may not 不可以; 可能不shouldnt 不应该 ( = ought not to )wont/ wouldnt 不愿意darent 不敢 can/may/must/need 问句的回答方式疑问句式 肯定句式 否定句式Can/Could you do sth. Yes, I/we/can/could No, I we cant/ couldntMay I do sth.? Yes , you may. No ,you mustnt/may not.Must I /we do sth.? Yes, you must No you neednt/dont have to.Need I do sth.? Yes ,you must No, you neednt/dont have to.7. You _ return the book now. You can keep it till next week if you like.A. cant B. mustnt C. neednt D. may not8. Johnny, you _ play with the knife, you _ hurt yourself.A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldnt29. -Will you stay for lunch?-Sorry, _. My brother is coming to see me.A. I mustnt B. I cant C. I neednt D. I wont10. -May I pick a flower in the garden?- _.A. No, you neednt B. Not, please. C. No, you mustnt D. No, you wont表示推测情态动词的重要用法.情态动词 对将来 对现在 对过去肯定的推测Must, should + V.常见 must be+ V. + be doing + have done+ V. + V. + be doing+ have done可能的推测may, might, could可以用 not 表示“可能不”否定的推测cant, couldnt+ V. + V.+ be doing+ have done疑问的推测can, could+ V. + V.+ be doing+ have doneEg.1. You must be Mr Smith-I was told to expect you here.2. He must have known what we wanted.3. We may have read the same report.4. He cant have slept through all that noise.5. Theres someone outside-who can it be?6. What can they be doing?7. These pills might help to cure your disease.8. You could be right, I suppose.1. I dont know where she is, she _ be in Wuhan.2. At this moment, our teacher _ our exam papers.这时，我们老师想必在批改试卷。3. The road is wet. It _ last night. (rain)4. Your mother _ for you.你妈妈一定一直在找你。5. Philip _ seriously in the car accident. 菲利普可能在车祸中受了重伤.6. -Linda has gone to work, but her bicycle is still here.-She _ (go) by bus.7. Mike _ his car, for he came to work by bus this morning.迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。 情态动词+完成式：1. must have done2. may/might have done3. cant couldnt jave done4. should /ought to have done5. shoulnt/oughtnt to have done6. could have done7. neednt have done8. would rather have done31. The ground is rather wet, so it _ have rained last night, didnt it?2. Tom _ have gone to Shanghai, but Im still not sure about it.3. The ground is very dry, so it _ have rained last night.4. Someone must have broken into our bedroom. Who _ have done it?5. I really regretted wasting the hours when I _ have studied hard, but it was too late.6.Your home is not far from your school, so you _ have left in such a hurry then.7. I _ have come to help you with your English, but I was too busy at that time.8. -I paid a visit to New York last month and we stayed at a nice hotel.-Oh,you _have stayed with Barbara.She is always willing to do you a favour.shall 和 will 的比较比较内容 肯定句 疑问句shall 表示“ 威胁 ”、 “警告”、 “允诺”的语气 与第一、三人称连用，表示征询对方的意见Will/would 1）表示“习惯”2）表示“愿意/望 ”3）表示“必然性”与第二人称连用，表示征询对方的意见9. If you _follow my advice, I _ offer you some help.10. _ you meet him right now or _ he wait outside, sir?11. He _ be punished if he disobeys. 如果他不服从, 就要受到惩罚.12. We are not going to quarrel at all if you _ only let me speak.只要你让我说话, 我们根本就不会吵架.13. -Sir, _ he go or stay?-Let him go. A. will B. shall C. might D. could14. The door _ open. 这门经常打不开.15. Ronald _ stay in his small garden for a long time every day in the past.A. could B. might C. should D. would16. You _ have the book after I read it. 我看完以后一定把这本书给你.would 和 used to 的比较 1、would 主要表示过去一段时间内的某种习惯，常与表示过去的时间状语连用，意为“总要，总是” used to 主要表示过去存在但是现在已不再存在的习惯