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1、Modal Verbs1 can / could1) He can speak French.When he was young, he could sing very well.4) Anyone can make mistakes.2) Could you please?Boys cant wear long hair in our class.3) How can you be so rude? can / be able to Last night, the fire spread through the hotel very quickly but everyone _ get ou
2、t. was able to 2 may / might1) -May I use your pen? - yes, you may. -No, you mustnt.2) It may/ might rain tomorrow.3) May all your dreams come true.5 ) Can this news be true?This cant be * * . She is in the office.4) may (might) as well do= had better do最好最好There is nothing to do ,so I may as well g
3、o to bed.3 must/ have to 1) We must work hard.We have to be here before 7:30.2) must-mustnt - neednt-Must I water the flowers? -yes, you must.-No, you neednt/ dont have to.3) must+ v cant+ v He must be at the library.4 dare 1情态动词情态动词 dare- dared darentDare he do it ? He dare not do it.2) 实义动词实义动词 da
4、re to do She dared to walk at night.3) I dare say 5 need1) You neednt call him.2) Need I come? - Yes, you must. - No, you neednt/dont have to.She didnt dare (to)3) 实义动词实义动词 (sb) need to do (sth) need to be done doing6 will / would1) Would you pass me the book?2) I will never do that again.3) This wi
5、ll be the house we are looking for.4) Fish will die out of water.He would get up early when he lived in the country. would/ used to used to可以表示过去的动作，现在已经不存在。可以表示过去的动作，现在已经不存在。Would常与表示过去的时间连用。常与表示过去的时间连用。 used to可以表示过去的状态可以表示过去的状态I used to get up early.He used to be a quiet boy.7 shall / should/ oug
6、ht to shall 1）What shall we do now？ Shall she come right now?在疑问句中，在疑问句中，shall用于用于1，3 人称，表示人称，表示-2）You shall do as your father says. He shall be punished.(威胁）威胁）He shall have the book when I finish reading.( 允诺）允诺）陈述句中，陈述句中，shall用于用于2，3 人称，表人称，表- should 1) They should arrive at 7:30It is nearly 7 oc
7、lock. He should be here at any moment.2) You wont believe he should be so rude! How should I know?惊讶，惊讶，“竟然会竟然会”) If you should change your mind, please let me know. ought to They should/ought to arrive at 7:30 ought not to/ oughtnt to1.-Excuse me, but I want to use your computer to type a report.-Y
8、ou _ have my computer if you dont take care of it.A. shant B. might not C. neednt D. shouldntA2. -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. needB3. One ought _ for what one hasnt done.A. not to be punished B. to not be
9、punishedC. To not punished D. not be punishedA情态动词情态动词have doneShe might have gone to Shanghai.It must have rained last night.It cant have rained last night.You neednt have waited for me.You should have started earlier.You ought to have helped him. cant /couldnt have done could have done may/might h
10、ave done must have done neednt have done should/ ought to have done1.With so much work on hand, you _to see the game last night. A. mustnt go B. could have goneC. shouldnt go D. shouldnt have goneD2. There was plenty of time. She _.A. mustnt have hurried B. couldnt have hurriedC. must not hurry D. n
11、eednt have hurried3. A computer _ think for itself; it must be told what to do.A. cant B. couldnt C. may not D. might notDA情态动词表示推测的用法1 对现对现在情在情况况的推的推测测肯定肯定 must, may, might be 否定否定 can, could not be2 2 对过去事实的推测对过去事实的推测肯定肯定 must/ may/ might have done否定否定 can, could not have done疑疑问问 can, could be?疑疑问问 can, could have done虚拟虚拟 would/ could / should/ might/ .have done