九年级unit5-情态动词表推测

精选优质文档-倾情为你奉上知识点：情态动词表推测用法总结（一）情态动词表推测的三种句式 能用于表推测的情态动词：must, can, could, will, would, may, might, should, ought to1.在肯定句中一般用must (一定)，may（可能），might / could（也许，或许）。 （1）He must/may/might know my address。他一定/可能/也许知道这个问题的答案。 （2）It is cold in the room. They must have turned off the heating. 屋里很冷，他们肯定把暖气关了。 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）He may not/might not know the scientist. 他也许不认识那位科学家。 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 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.对将来情况的推测，用“情态动词 + 动词原形”。 （1）She must / may / might / could arrive before 5. 5:00前她一定/可能/也许到。 （2）She must/may/might/could walk miles and miles among the hills without meeting anyone. 她一定/可能/也许会在山里一连走好几英里而遇不到一个人。 2.对现在或一般情况的推测，用“情态动词 + be”，“情态动词 +be doing”或“情态动词 + 动词原形”。 （1）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）He cant ( couldnt ) / may ( might ) not be at home at this time. 这个时候他不可能/可能不在家。 （3）Mr. Bush is on time for everything .How can ( could ) he be late for the opening ceremony ? 布什先生一向准时，这次开幕式他怎么可能迟到呢？ 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 ( could ) not / may ( might ) not have been at home . 门锁着，他不可能/可能不在家。补充强调：推测的句型特点（对某一次的推测句型有两部分：语气和时态）（1）语气部分：（以下情态动词语气由强至弱） 肯定句：must、may、might（=could） 否定句：cant（=couldnt）、maynt、mightnt 疑问句：can、could（语气更加委婉不确定）（2）时态部分： be表示对现在的推测 have done表示对过去的推测 be doing表示对正在进行的推测u 语气部分写在前时态部分写在后，组合在一起就是推测课内巩固：( ) 1- Look! The man standing there is Mr Green. - It _ be Mr Green. He has gone to England.AcantBmustntCmayDwould( )2. - Whos still in the classroom? - It _ be John. Hes always the last to leave. A. must B. could C. might D. could( ) 3.-Whose T-shirt is this? -It _ be Johns. Its much too small for him. A. cant B. couldnt C. mustnt D. neednt（ ）4. - Whose volleyball is it? - It _ be Carlas. She doesnt like volleyball. A. cantB. mightC. couldD. must( )5. -Listen ! Is Rose singing in the next room? - No, it _ be Rose. She has gone to Shanghai.A. may not B. cantC. mustnt D. neednt( )6. Whos singing in the next room? Is it Sally? It _ be her . She has gone to New York. A. cant B. must C. shouldnt D. can( )7. - May I take the newspaper out of the reading room? - No, you cant. You _read it here. Its the rule. A. must B. would C. may D. might( )8. Is that Shelly in the bedroom? -No, she _be there. She has gone to school.A. wontB. needntC. cantD. mustnt( ) 9. -May I take the magazine out of the reading room?-No, you cant. You _ read it here. Its the blue. A. must B. would C. may D. could( )10. Look! It be Mr Zhang. No, it be Mr Zhang. He has gone to Paris.A. may, mustnt B. must, may C. must, cant D. can. May not( ) 11. -Whose shirt is this?-It _ be Li Leis. It is too big for him. A. couldB. must C. mightD. cant ( )12. Sorry, I cant join you. I _study for a test.-What a pity! Maybe next time.A. cantB. have toC. mustntD. might( )13.This pair of shoes _ Li Gangs ,Its too big for him . A. cant be B. could be C. might be D. must be( )14.The light is on in Mr. Greens room. He _ be at home. A. must B. can C. mustnt D. cant( )15. The socks must be Lindas. No, they be. Theyre too small for her.A. mustntB. may notC. might notD. cant（ ）16. Where is Xiao Ling? She _in her bedroom,but Im not sure.A.must be B.may be C.maybe D.cant be（ ）17 Look. It must be Jack on the playground. It _ be him. Because I saw him enter the school library just now. A. mustnt B. cant C. may D. couldnt.（ ）18.where is Tony? He _ be on the playground because he likes playing basketball. A. mayB. will C. cantD. mustnt（ ）19. - Will the new iphone cost a lot?- I _ think so. Apples products are usually expensive.A. shouldnt B. neednt C. would D. must( )20Whose sweater is this? It _ be Johns. Its too small for him. A. must B. might C. cant D. mustnt（ ）21. Here is a hair band. The owner_ be a boy. A. must B. can C. cant D. mustnt( ) 22. -Whose shirt is this?-It _ be Li Leis. It is too big for him. A. couldB. must C. mightD. cant ( ) 23. -The winner is a tall and thin boy with glasses. -Oh, it_ be Mike. He is a little bit heavy. A. cant B. might C. mustnt D. will（ ）24. Whos singing in the next room? Is it Sally? It _ be her . She has gone to New York. A. cant B. must C. shouldnt D. can( )25. The girl singing in the next room _ be Linda. Why? Because she is still in Shanghai. A. cant B. couldnt C. may not D. might not( ) 26. - Whos singing in the next room? Is it Lucy? - It be her. She has gone to New York.A. shouldnt B. mustnt C. cant D. wont( ) 27. Wheres Lucy ? She _ in the office. I saw her there just now. A. cant be B. must be C. can be D. should be专心-专注-专业