情态动词的运用研究.ppt

1. ---- Will you go skating with me this winter vacation? ---- It ___ . ( 2002上海) all depended B. all depends C. is all depended D. is all depending 2. I failed in the final examination last term and only then _____ the importance of studies.( 2004重庆 )A. I realized B. I had realizedC. had I realized D. did I realize 解析：答案为D. 句首为“only + 副词”时，句子要用部分倒装语序；根据语境应为一般过去时态。 3. ---- I would never come to this restaurant again. The food is terrible! ---- _______ . ( 2004全国 ) A. Nor am I B. Neither would I C. Same with me D. So do I 答案B。第一个句子使用了would, 用neither表示附和的意义时，助动词应与上文一致。 * modal verb Grammar ( 32ms ) 情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语． 只作情态动词的　　can/could, may/might, 　　　　　　　 　ought to， must 可情态可实义的　　need, dare/dared 可情态可助动词的　shall/should, will/would 相当于情态动词的　have to, used to Must , can/could, may/might 的用法 must 1.Must 表示推测时， 只能用于肯定句。 这个电脑肯定出了问题。 There must be something wrong with the computer. 你努力学了一整天， 一定累了吧 You have worked hard all day. You must be tired. 2.Must +be doing/do 表示对现在的动作进行肯定推测 他现在一定在看小说 He must be reading novels now. 他们买了一辆新车。 他们一定很有钱 They have bought a new car. They must have a lot of money. 3.Must +have done 表示对过去发生的事情作出的肯定判断 他们在玩篮球， 他们一定完成了作业。 They are playing basketball, they must have finished their homework. 路是湿的。昨天晚上一定下雨了。 The road is wet. It must have rained last night. can/could 1. can /could 表示推测时，只能用在否定句或疑问句中。 It’s so late. Can Tom be reading? 这么晚了，汤姆还在看书吗？ 这个人不可能是玛丽， 她生病了。 It can’t be Mary. She has fallen ill. 她不可能在说谎。 She couldn’t be telling lies. 2. can/could have done 对过去发生行为的可能性进行推测: 刚才我还看见他了， 所以他不可能出国的。 I saw him just now so he couldn’t have gone abroad. 门是锁着的， 所以她不可能在家。 The door was locked. She couldn’t have been at home. 3. can/could have done “本可以，本来可能已经”用于肯定句中，表示对过去发生的事情做出的判断， 你本来可以考的更好。 You could have had a better mark. may/might 1.May/might表示推测时，只能用于陈述句，表示对现在或将来要发生的动作把握不大。 她们明天可能会到这里来。 They may come here tomorrow. 他们可能还在等我们呢。 They may be still waiting fo