初中情态动词表推测的用法及练习(经典).doc

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1、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

2、 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

3、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

4、 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 ( cou

5、ld ) 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？1. Look! The light is out in her room. She to bed already. A. must go B. had to go C.must have gone D.has gone 2. We had a wonderful time yesterday. You .Why didnt you come? A. had to co

6、me B.should have come C.might have come D.must have come 3. There were already five people in the car but they managed to take me as well. It_ a comfortable journey.A. cant be B. shouldnt be C. mustnt have been D. couldnt have been4. My sister met him at the Grand Theatre yesterday afternoon, so he

7、_ your lecture.A. couldnt have attended B. neednt have attendedC. mustnt have attended D. shouldnt have attended5. I was really anxious about you. You _ home without a word.A. mustnt leave B. Shouldnt have left C. Couldnt have left D. neednt leave6. Oh, Im not feeling well in the stomach,I_ so much

8、fried chicken just now.A. shouldnt cut B. mustnt have eaten C. shouldnt have eaten D. mustnt eat7. Mr.White _ at 8:30 for the meeting, but he didnt show up.A. should have arrived B. should arrive C. should have had arrived D. should be arriving8. You _ be tired - youve only been working for an hour.

9、A. must not B. won t C. can t D. may not9. - Isn t that Anns husband over there?- No, it _ be him -Im sure he doesnt wear glasses.A. cant B. must not C. wont D. may not10. There _ be any difficulty about passing the road test since you have practised a lot in the driving school.A . mustnt B. shant C

10、. shouldnt D.neednt11. I was on the highway when this car went past followed by a police car. They _ at lease 150 km an hour.A. should have been doing B. must have been doingC. could have done D. would have done12. He _ have completed his work; otherwise, he wouldnt be enjoying himself by the seasid

11、e.A. should B. must C. wouldnt D. cant13. - The woman biologist stayed in Africa studying wild animals for 13 years before she returned.- Oh, dear! She _ a lot of difficulties!A. may go through B. might go throughC. ought to have gone through D. must have gone through14. This cake is very sweet. You

12、 _ a lot of sugar in it.Ashould put Bcould have put Cmight put Dmust have put15. Catherine, I have cleaned the room for you.Thanks. You it. I could manage it myself.Aneednt do Bneednt have done Cmustnt do Dshouldnt have done16.Tom is never late for work. Why is he absent today?Something _ to him.Amust happen Bshould have happened Ccould have happened Dmust have happened