高中英语第二册unit15情态动词课件.ppt

Duty report,Principles of Class 7,Grammar,Modal Verbs,must have to ought to,can could may might must,had better should have got to,must cant,can,may might,Guess,could,can positive,guess,dialogue,?,Guess in which box the princess is . (workbook exercise),Thank you,Practice makes perfect !,A: Someone is coming. Who can it be? Can it be Mr. Li? B: It cant be him. He has gone to the States.,“Can”表示猜测用在疑问句中,在否定句中可以用 could not,may not or might not .,-Is John coming by train? -He should ,but he may not . He likes driving his car. (NMET2002),Playing football can be exciting.,Anyone who wants to try can be successful.,只要肯尝试，每个人都可能会成功。,Can也可用于肯定句，指理论或逻辑上的 可能性（可能是，也许会，会）,must/may/might + do /be 表示对现在情况推测 ( 肯定，可能，也许 ),must/may/might + doing 表一种动作的进行性(肯定，可能，也许正在),must/may/might + have done 表示对过去情况推测 (肯定，可能，也许已经),Theres a lot of noise from next door.They must be having a party.,Mr Yun must be in the domitory,Theres no light in her room. She might have gone out.,The ground is so wet, it must have rained last night.,fi,6. My English-Chinese dictionary has disappeared. Who _ have taken it? a. should b. must c. could d. would 7. My sister met him at the Grand Theater yesterday afternoon, so he _ lecture. a. couldnt have attended b. neednt have attended c. mustnt have attended d. shouldnt have attended 8. - Could I borrow your dictionary? - Yes, of course you _. (NMET1992) a. might b. will c. can d. should,fi,The children must have watered the tomatoes yesterday, _they,The minister must have arrived in Shanghai, _he,didnt,hasnt,You cant be serious, _you?,are,You may have noticed something before I came,_you?,hadnt,拓展,A: Who are the two persons over there? B: They might be tourists A: Tourists? They cant be, Im afraid. Tourists usually take cameras, and caps with them. B: Youre right. They could be actors. You see, they look beautiful. A: Im afraid I cant agree with you.They must be writers or photographers, I think. B: They may be writers; but can they be Photographers? Dont photographers take cameras with them? A: Right, they cant be photographers.,A: Who are the two persons over there? B: They might be tourists A: Tourists? They cant be, Im afraid. Tourists usually take cameras, and caps with them. B: Youre right. They could be actors. You see, they look beautiful. A: Im afraid I cant agree with you.They must be writers or photographers, I think. B: They may be writers; but can they be Photographers? Dont photographers take cameras with them? A: Right, they cant be photographers.,The more we Practice , the happier we are !,Entertainment,entertainment,Cant be/do Cant be doing sth. 不可能正在做 Cant have done sth. 不可能已经做 Could have done可能已经 本来能够