初中情态动词表推测的用法及练习(经典)(3页).doc

-初中情态动词表推测的用法及练习(经典)-第 3 页情态动词表推测的用法 （一）情态动词表推测的三种句式 (can不肯, may 不问 must 肯定不否问)1.在肯定句中一般用must (一定)，may（可能），might （也许，或许）。 （1）The photo must be Lus, those must be their parents. （2）The policeman may know the way to that school.（3）The notebook may belong to Jim, its on his desk.（4）If you have any idea where it might be, please call me.2.否定句中用cant / couldnt(不可能), may not/might not(可能不)。 （1）It cant/couldnt be the headmaster. He has gone to America. 这不可能是校长，他去美国了。 （2）The doctor may not/might not be in the hospital now, Its nearly six oclock.3.疑问句中用can/could (能?)。 （1）Could he have finished the task? 他可能把任务完成了吗？ （2）Can he be at home now? 他现在能在家吗？ 注：以上三种句式中情态动词的语气按程度都是依次递减的。might, could并非may, can的过去式，而表示语气较为委婉或可能性较小。 （二）情态动词表推测的三种时态 1.对现在正在进行的动作推测时，用“情态动词 + be +doing”。 例：He must / may / might / could be listening to the radio now. 他一定/可能/也许正在听收音机。 2.对一般情况的推测，“情态动词 + 动词原形”。 （1）He cant ( couldnt ) / may ( might ) not be at home at this time. 这个时候他不可能/可能不在家。 （2）Mr. Bush is on time for everything，he cant (couldnt) be late for the meeting布什先生一向准时，这次会议他不可能迟到。 3.对过去情况的推测，用“情态动词 + have +过去分词”。 （1）It must / may / might / could have rained last night .The ground is wet. 地湿了，昨晚肯定/可能/也许下雨了。 （2）The door was locked. He can ( could ) not / may ( might ) not have been at home . 门锁着，他不可能/可能不在家。 （3）Can / Could he have gotten the book？ 难道他找到书了吗？ Exercises: 用“must”or“cant”.填空1. I have tried to call him at the office, but there is no reply. He be at home.2. They have bought a new car. They have a lot of money.3. She is carrying a Japanese newspaper. She be Chinese.5. She always comes top at the university. She be very clever.6. She is acting in a Shakespeare play tomorrow. She be an actress.用must / can / could / may / might 和他们的否定形式填空1. Could I borrow your dictionary?-Yes, of course you .2. She doesnt answer the bell. She be asleep.3. The ground is wet. It have rained last night.4. He is writing with a pencil. He have lost his pen.6. There is much gas here, you smoke here.7. Look! An old man is lying in the middle of the street. He be hurt in an accident.9. Nobody saw her at the meeting yesterday, she have spoken at the meeting 选择（ ）2. That man must be Sarahs husband.-No, he be her husband. She is still single.A. cant B. mustnt C. may not D. ought to（ ）3. Peter come with us tonight, but he isnt very sure.A. must B. may C. can D. will（ ）4. What it be?-It be a mail box, because it is moving. It be a car.A. can; cant; must B. can; can; mustC. can; mustnt; must D. must; mustnt; can（ ）5. Look, someone is coming. Guess .- ? Jack. Hes always on time.A. who can it be B. who he may C. who he can be D. who it can be（ ）. Susan refuses to marry Jack now. She her mind.A. must change B. should have changed C. must have changed D. would have changed（ ）9. Sue come together with us tonight, but she isnt very sure yet.( )1 John_ come to see us tonight, but he isn't very sure yet. A. may B. can C. has to D. must 2. ( )1. He_ be in the classroom, I think No, he _ be in the classroom. I saw him go home a minute ago. A. can; may not B. must; may not C. may; can't D. may; mustn't ( )2 Shall I get one more cake for you, Dad? Thanks, but you_, I've had enough.A. may not B. must not C. can't D. needn't ( )3 Even the top students in our class can't work out this problem, so it be very difficult. A. may B. must C. can D. need( )4 He isn't at school. I think he _ be ill. A. can B. shall C. must D. has to( )1 The children_ play football on the road. A. can't B. can C. mustn't D. must ( )2 You _ be late for school again next time. A. mustn't B. needn't C. don't have to D. don't need to( )3 Must I do my homework at once? No, you_. A. needn't B. mustn't C. can't D. may not ( )1 You_ worry about your son. He will get well soon. A. needn't B. can't C. mustn't D. have to ( )3 Must we do our homework first? No, you_. You may have a rest first.A. mustn't B. needn't C. may not D. can't8. Are you coming to Jeffs party?Im not sure. I _ go to the concert instead.A. must               B. would             C. should             D. might