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1、情态动词 Modal Verbs请回忆一下你所学过的情态动词有哪些？_下面来具体学习各情态动词的用法。一、 may & might 1.表示请求多用于第一人称，might比may语气委婉。肯定回答用may或can,否定回答用cant, mustnt. May/might I borrow some money?Yes, you may/ you can. No, you cant/ you mustnt2.表示许可，允许。might为may的过去式You may drive the car. You may not take the book home.He said he might len
2、d us some money. He asked if he might use the phone.3.表示对现在或将来的推测、可能，用于肯定句或否定句。may的可能性大于might。He may be very busy now. They may/might be waiting at the station.The problems may be solved in a number of different ways.He might tell his wife.She might not believe your story.4.may/might have done 表示对过去
3、的推测。用于肯定句或否定句。may的可能性大于might。He may have gone abroad.Jack may/might have been hurt seriously in the car accident.He may/might not have finished the work.Eva might not have seen him yesterday.5.might have done还可以表示虚拟，意为本来能够做某事却没有做。表示轻微的责备、埋怨。You might have told me. 你本来可以告诉我的。I might have helped her b
4、ut I was too busy._You might have given her more help._6.用于祈使句中，表祝愿。May you succeed! 练习一1. He_you more help, even though he was very busy. A. might have given B. might give C. may have given D. may give2. Sorry Im late. I _ have turned off the alarm clock and gone back to sleep again.A. mightB. shou
5、ldC. can D. will3. - Are you coming to Jeffs party?- Im not sure. I _go to the concert instead.Amust Bwould Cshould Dmight4. Helen _ go on the trip with us, but she isnt quite sure yet.A. shall B. must C. may D. can5.I left my handbag on the train, but luckily someone gave it to a railway official.H
6、ow unbelievable to get it back! I mean, someone _ it.A. will have stolen B. might have stolen C. should have stolen D. must have stolen二、can & could1.提出请求，could比can语气婉转。Can I go now? Can you help me? Could you show me the way?Could you pass me the books?Yes, I can. No, Im afraid not.2.表示许可、允许和may差不多
7、，口语中can更常见。You can (may) park here.You can (may) take the book home.You cant smoke here.3.表示能力，can指现在，could指过去，be able to do多指通过努力而做成某事。She can run very fast Who can answer the question?When I was young, I could climb any tree in the forest.I could drive before I left school.There was a big fire in
8、the hotel but everyone was able to escape.4.表示对现在的猜测、怀疑、不相信的态度。用于否定句、疑问句或感叹句中。can比could的可能性大。It cant be the postman at the door. Its only 6.That cant be Mary. She is in the hospital now.There s someone outside. Who can it be?Could this be true? How could you do that? How can you be so careless?5.can
9、/could have done表示对过去事情的推测，用否定句或疑问句中。can比could的可能性大。He cant have been to that town._I couldnt have left it on the bus._Can he have got that message? 他收到那条消息了吗？My sister met him at the Grand Theater yesterday afternoon, so he couldnt have attended your lecture._6.could have done 还可以表示本来可以做某事却没有做成。表达一
10、种遗憾。He paid for a seat when he could have entered free._You could have received my letter._7.表示理论上或习惯上的可能性，意为“有时可能会”It can be very cold here at night.It can be quite windy on the hills.山上有时风很大。He can be very careless sometimes.练习二1.-Could I borrow your dictionary? -Yes, of course you_ A. mightB. wil
11、l C. canD. should2.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 been3.The fire spread through the hotel very quickly but everyone _ get out.A. had toB. wouldC. couldD. was able to
12、4.-I stayed at a hotel while in New York.-Oh, did you? You_ _with Barbara.A. could have stayed B. could stayC. would stay D. must have stayed5.Will you stay for lunch? Sorry, ,My brother is coming to see me.A. I mustnt B.I cant C. I neednt D.I wont6. 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 attendedD. shouldnt have attended7. Mr. Bush is on time for everything. How _ it be that he was late for the opening ceremony? Acan Bshould Cmay D. must8. - Isn t that Anns husband over there? - No, it
