Modal Verbs• can & could• Man cannot live without air. ---- 能力• SARS can be very dangerous. ---- 可能性• You can have the book when I have finished it. ---- 许可 Can: 本能 be able to: 经过努力学习才能够• The fire spread through the hotel very quickly, but everyone ______ get out. A. had to B. would C. could D. was able to • 当我们要表示”某件事情已经成功完成”时 , 应用 was/were able to = manage to do /succeeded in doing, 不用 could• He was able to go to the party yesterday. • can (can / could)• be able to (is/ are/ was/ were / have been/ had been /will be able to)D• may & might•用于祈使句表祝愿•May you both be very happy!•May you succeed!1. “_____I stop here, sir?” “ No. Go on to the next paragraph, please.” A. Will B. May C. Would D. OughtB2.--Is John coming by train? --He should, but he ____ not. He likes driving his car. A. must B. can C. need D. may --Can it be true? --Yes, it must be.( 肯定 ) --it may be( 可能 )/might( 可能性更小 ) --No, it can’t be true.( 绝对否定 ) --No, it mayn’t be true.( 可能 )D• must & have to1.mustn’t 表示不准 , 禁止 You mustn’t walk on grass. You mustn’t pick the flowers in the park.2.Must 引导的问句 --Must we hand in our homework today? --Yes, you must. --No, you needn’t./No, you don’t have to. Need? Need I go now?3.Must 表示 “一定” , “ 必定”等推测意义时 , 只用在肯定句中 . 否定句疑问句用 “ can”• It must be true.• It can’t be true. Can it be true?• Must have done 对已经发生事情的肯定猜测• Must be/V 原形 对一般事实的肯定猜测• Must be doing 对正在进行事件的肯定猜测(6)They must have passed the exam,• They must have passed the exam yesterday,• 昨天夜里一定下过雨了 .• It must have rained last night.(7)You must b...
