情态动词-T.docx

情态动词基础篇Presentation1---常用的情态动词一can\could表示能力1、can\could用语表示具有某种能力Can you ride a horse?我会唱许多英语歌曲。___________________________________________ I can sing many English songs. 注：be able to与can\could同义，但是：can只是单纯的表示某种“能力”，时态只有一般现在和一般过去时，无人称变化be able to叙述过去经过一番努力才能完成的事情或前面有特殊说明，并且有时态、人称的变化Ex: True or False.【正】Can you speak any foreign languages?????? 【正】Are you able to speak any foreign languages?????? 【误】The fire spread the building quickly but everybody could escape. 【正】The fire spread the building quickly but everybody was able to escape.【正】The fire spread the building quickly but everybody managed to escape.2、can还可以表示推测，意为“可能”，多用于否定句和疑问句，意为“不可能”或“……可能吗”He can’t be in the classroom now. I saw him in the library just now.Mike can’t have missed the way. He got the map.Ex: 1. ---_____ you play baseball?--- No, I _______.A. Can, may B. Can’t, can’t C. May, can’t D. can, can’t2. They _________ do well in the exam.A. can be able toB. be able to C. can able to D. are able to 3. ---Can you speak Japanese?---No, I _________.A. mustn’t B. can’t C. needn’t D. aren’t able to 4. A computer _____ think for itself, it must be told what to do.A. can’t B. couldn’t C. may not D. might not5. My mother asked me not to watch TV unless I finished my homework, but I _______ watching.A. cannot helpB. couldnt but C. had to helpD. couldnt help6. Black holes ______ not be seen directly, so determining the number of them is a tough task.A. can?????????????????B. should??? ?????C. must??? ????????D. need 7. ---I saw Jack having a meeting in the office yesterday afternoon.---It _____ be him, for he has gone to Tokyo on business.A. can’t B. may not C. mustn’t D. needn’t8. --- Could I borrow your dictionary?--- Yes, of course you ______.A. might B. will C. can D. should9. ---Who is the boy over there? Is it John?---No, it ________ be him. John is much taller.A. mustn’tB. may not?????????C. can’tD. needn’t10. Michael __________ be a policeman