高中英语 语法 情态动词表推测的用法共36张

1、情态动词表推测,情态动词,must, can, could,may, might,表推测的用法,情态动词中的,must, can, could, may,might,都表推测。其中,must,的可能性最大,can / could,次之,may / might,最小。具体,用法如下,1,must,的用法,1,表推测时，意思是“一定、准是,语气较肯定，较有把握,He must be American,It is certain that he is American,他准是个美国人,2,must,表推测只用于肯定句,如要表示“一定不、肯定不,时，应用,cant,如询问某种可能时，应用,can,He

2、 must know my address,他肯定知道我,的地址。（一定,He cant know my address,他肯定不知道,我的地址。（一定不,Can he know my address,他知道我的地,址吗？（询问可能性,3,must,表示推测时，可以推测现在,正在发,生的动作,过去发生的动作,He must have a car now,现在）他一定,有辆小汽车,He must have finished the work,过去发,生）他一定已完成了工作,There are so much noise in their,room.They must be quarrelling

3、.,正在进行,注,must,表示推测时很少用于将来的情况,一般不用,He must come tomorrow,可用,Its,certain / Im sure that he will come,tomorrow,4,在反意疑问句中，当附属部分含有表,示推测意义的,must,时，疑问部分的助动词应,与,must,后面的动词在非推测情况下的用法保,持一致,He must be a worker, isnt he,现在,他准是个工人，是吗,It must have rained last night, didnt it,过去）昨晚一定下雨了，是不是,You must have learned E

4、nglish for many,years, havent you,完成时）你一定学,了好多年英语，是吗,2. can / could,的用法,1,can,表示推测“可能性”时，往往用于,否定句或疑问句,Cant,一定不”，语气很,肯定,can,在疑问句中意思是“会、可能,He cant be at home. = It is impossible,that he is at home,他一定不在家,2,can /cant,后可接进行时,完成时，表示,对现在发生的动作或过去发生的动作进行推,测,They cant be reading in the library,他们,一定不在图书馆读书,3

5、,在反意疑问句中，当陈述部分含有表,示推测意义的,cant,时，疑问部分的助动词应,与,cant,后面的动词在非推测情况下的用法保,持一致,He cant be a teacher, is he,他不是教师,是吗,She cant have finished her homework, h,as she,她一定没有完成家庭作业，是不是,4,could,可用于表示某事有可能发生或可,能是事实,Dont eat it. It could be poisonous,不要,吃它，可能有毒,5,could,还可以用于表示客气、委婉、礼貌,的请求语气,Could you help me,6,couldnt

6、,表示否定推测，表示某事不可,能真实，或由于特定事实或环境某事肯定不,会发生,It couldnt possibly be poison,这不可能,是毒药,注：有时与形容词的比较级连用强调某人或,某物不可能再更多地具有某种属性,I couldnt be happier,我简直是幸福极了,3. may,和,might,的用法,1,may, might,表示推测“可能性”时,意思是“可能”、“也许”，语气没有,must,肯定,He may / might be American,注,might,不表示过去时态，只是语气上比,may,更委婉，表示的可能性更小,2,may, might,表推测时，可以

7、用于否定,句，意思是“可能不、也许不”，但不用于,疑问句,He may / might not be at home,他也许不,3,may, might,可以推测现在正在发生的,动作或过去发生的动作,He may / might be sleeping now,现在,他可能正在睡觉,These students may / might have seen,the film before,过去,这些学生以前可能看过这部电影,4,may, might,还可以推测将来的情况,She might not come this afternoon,她今,天下午可能不来了,4,情态动词,dare, need

8、,通常只用于,否定或,疑问,e.g., Who dare do it,You neednt go now,试看下列的填空,Well try to finish the work in time, but,we need_ some more workers,A. ask for B. to ask for,选项,A,为不加,to,的不定式，那么此时的,need,为情态动词，此句为肯定句显然不适，答案,为,B need to do,中的,need,为行为动词,5. dare, need,还可用作行为动词，后面可,跟加,to,的不定式,试比较,A.who dare do it,B.He dares

9、 to do it,A.He neednt do it,B.he needs to do it,上述句子中,A,句为含情态动词的句子,B,句中,dare. need,均为行为动词,注意动词,dare,的某些特殊用法,1,在下列句子中只可用情态动词,dare,不,可用行为动词,dare,How dare you say I am unfair,I dare say,*I dare to say, X,e.g., Dont worry, sir. I dare say, nobody,will come again,2,行为动词,dare,后面跟不定式时，在下述三,种情况之一时可省去不定式符号,t

10、o,与助动词连用时（即用于否定，疑问句,e.g., He doesnt dare (to) go to the forest,done at night,与,never,连用时,e.g., The man never dares (to) do,anything without his owners permission,当,dare,出现在,WH,连接代词,引导的名词从句,中时,e.g., They wonder why the little boy dares,to) live in such a dangerous place,1,I thought you_ like somethin

11、g to,read. So I have brought you some,books,A. ought B. might,C. could D. must,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,5,I saw Mary in the library yesterday,You_ her. She is still abroad,A. mustnt see B. cant have seen,C.

12、 mustnt have seen D. couldnt see,6. David, you _play with the valuable,bottle, you_ break it,A. wont; cant B. mustnt; may,C. shouldnt; must D. cant; shouldnt,7. Susan refuses to marry Jack now. She,_her mind,A. must change,B. should have changed,C. must have changed,D. would have changed,8. Sue_ com

13、e together with us,tonight, but she isnt very sure yet,A. must B. may C. need D. will,9. Aunt Margaret_ the train,otherwise she would have arrived here,by now,A. must have missed,B. should have missed,C. had missed,D. might miss,10. Peter _come with us tonight, but,he isnt very sure,A. must B. may C

14、. can D. will,11. Oh, Im not feeling well in,the stomach, I _ so much,fried chicken just now,A. shouldnt eat,B. mustnt have eaten,C. shouldnt have eaten,D. mustnt eat,C,12. You cant imagine that a well,behaved gentlemen _ be so rude,to a lady,A. might B. need,C. should D. would,13,Write to me when y

15、ou get home,_,A. I must B. I should,C. I will D. I can,C,C,14. My sister met him at the Grand,Theatre yesterday afternoon, so,he _ your lecture,A. couldnt have attended,B. neednt have attended,C. mustnt have attended,D. shouldnt have attended,A,15. There was a lot of fun at,yesterdays party. You _ c

16、ome,but why didnt you,A. must have,B. should,C. need have,D. ought to have,D,16,When can I come for the,photos? I need them tomorrow,afternoon,They _ be ready by 12:00,A. can B. should,C. might D. need,B,17,I stayed at a hotel while in New,York,Oh, did you? You _with,Barbara,A. could have stayed,B.

17、could stay,C. would stay,D. must have stayed,A,18. Jack _ yet, otherwise he,would have telephoned me,A. mustnt have arrived,B. shouldnt have arrived,C. cant have arrived,D. neednt have arrived,C,19.When he was there, he _ go,to that coffee shop at the,corner after work everyday,A. would B. should,C.

18、 had better D. might,A,20. Sir, you _ be sitting in this,waiting room. It is for woman,and children only,A. oughtnt to B. cant,C. wont D. neednt,A,21. Its nearly seven oclock. Jack,_ be here at any moment,A. must B. need,C. should D. can,22. I wonder how he _ that to the,teacher,A. dare to say B. dare saying,C. not dare say D. dared say,C,D,23. I told Sally how to ge