情态动词表推测的讲解及练习2题.doc

情态动词must, can, could, may, might表推测的用法 、肯定推测mustcan / couldmay / might 肯定、可能否定推测can t couldnt 不可能、对三种情况的推测 、对现在状况或动作的推测: must/can / could/may / might/cant/couldnt+v原 、对正在进行的动作的推测：must/can / could/may / might/cant/couldnt be doing 、对过去发生的动作的推测：must/can / could/may / might/cant/couldnt have done、情态动词must, can, could, may, might表推测时的反意疑问句:根据情态动词后的词而定，有last night/yesterday/ago 时，视为过去式、He must be a worker, isnt he? （现在）他准是个工人，是吗？、It must have rained last night, didnt it? （过去）昨晚一定下雨了，是不是？、You must have learned English for many years, havent you? （完成时）你一定学了好多年英语，是吗？、He cant be a teacher, is he? 他不是教师，是吗？、She cant have finished her homework, has she? 她一定没有完成家庭作业，是不是？、用法、 He must be American. = It is certain that he is American. 他准是个美国人。 、He must know my address. 他肯定知道我的地址。（一定） 、He cant know my address. 他肯定不知道我的地址。（一定不） 、，可以推测现在/正在发生的动作/过去发生的动作。He must have a car now. （现在）他一定有辆小汽车。He must be doing his exercises in the classroom.（正在进行）他一定在教室里做练习。He must have finished the work.（过去发生）他一定已完成了工作。He cant be at home. = It is impossible that he is at home. 他一定不在家。ts so late. Where can she have gone? 天晚了，她可能去哪儿了呢？Dont eat it. It could be poisonous. 不要吃它，可能有毒。The plane could be delayed by fog. 飞机可能会因为雾晚点。He was not at home last night . He could/ might have gone to movies. I didnt see her at the meeting yesterday; she couldnt have spoken at the meeting. He may / might be sleeping now. （现在）他可能正在睡觉。The boy may / might not be watching TV at home. （现在）这个男孩可能没在家看电视These students may / might have seen the film before.（过去）、could还可以用于表示客气、委婉、礼貌的请求语气。Excuse me, could you tell me the way to the bus station?Could you help me?、may, might还可以推测将来的情况。I think we should take raincoat with us, it may rain. 我想我们应该带上雨衣，可能要下雨了。She might not come this afternoon. 她今天下午可能不来一、单项选择1 John_ come to see us tonight, but he isnt very sure yet. A. may B. need C. cant D. must 2 John isnt in the classroom. He play soccer on the playground with Bob. A. can B. must C. should D. cant3 That _not be her husband . She is still single. A. may B.can C. could D. might 4 You_ go and see a doctor at once because you got a fever. A. can B. must C. dare D. would5 -Can you speak Japanese? -No, I_. A. mustnt B. cant C. neednt D. may not 6 -He_ be in the classroom, I think. -No, he _ be in the classroom. I saw him go home a minute ago. can; may not B. must; may not C. may; cant D. may; mustnt 7 -Is Lena swimming in the pool? -No, she swim. She is terrified of water.A. may not B. must not C. cant D. neednt8 He isnt at school. I think he _ be ill.A. can B. shall C. must D. might9 -What do you think “upset” means? - Im not sure. It mean “sad”.may B. must C. can D. should 10 The children_ play football on the road. cant B. can C. mustnt D. must 11.The road is wet . It _last night.A must rain B must have rained C could have rained D