情态动词teacher can， could 观察与思考： 1. The child can speak English well. （ ） I could swim when I was only six. （ ） 2. You can have the book when I have finished it. （ ） Can I borrow your book? （ ） - Yes, you can. / -No, you cant. （ ） 3. Could you show me how to pronounce the word? （ ） - Yes, you can. / -No, you cant. （ ） 4. There is someone knocking at the door. Who can it be? ( ) The streets are all dry. It cant have rained during the night. ( ) 5I could have studied hard, but I didnt . 归纳与总结： 1. _ 2. _ 3. _ 4. _ 5_ can，be able to的区别 （1）can表示主观能力，be able to表示客观能力。 I _swim, but I _ to swim now because there is not any river here. 我会游泳，但由于这里没有河，我不能游泳。 （2）can只有现在式和过去式，而 be able to可用于各种时态。 （3）be able to可用于动词不定式和动名词结构中，can不能。 I would like to be able to learn, but Im too old. The patient regrets not being able to take the doctors advice. （4）be able to可和情态动词连用，can不能。 When one learns a foreign language, one muat be able to use the foreign language, forgetting all about his own. may，might 观察与思考： 1. People may not pick flowers in this park. （ ） She said that he might take her dictionary. （ ） May I come in? -Yes, you may. / -No, you mustnt. （ ） 2. She may be waiging for you in the entrace hall. （ ） You may go and ask him, but he may not answer you. Ive got a lot of books that might interest you. 3. You may have read some account of the matter. （ ） 归纳与总结： _ 2. _ 3. _ . must 观察与思考： 1Everybody must obey the rules. ( ) -Must the book be finished by the end of this month? -Yes, it must./ No, it neednt be.(No, it doesnt have to be) （ ） 2. Judging from his clothes, he must have a rich father.（ ） 3. The ground is wet, it must have rained last night. （ ） 归纳与总结: 1. _ _ 2. _ 3_ Shall, should 观察与思考： 1You shall fail if you dont work harder. ( ) He shall have the book when I finish reading it. ( ) 2Where shall I wait for you? （ ） Shall he come in and sit down? 3You shouldnt judge a stranger always by the clothes he wears. 4You should have been here ten minutes ago. 5You shouldnt have got up so late. 6I suggested that we (should ) go out for a walk. 归纳与总结： 1 _ 2 _ 3 _ 4 _ 5 _ 6 _ will，would 观察与思考： 1I will have nothing to do with this matter. （ ） A man who wont work is no good. I promised that I would do my best. 2Will you please pass me the salt? Would you please let me keep my hands in my pockets? 3Every morning he would go for a long walk. She used to live in the countryside. But now she didnt. 归纳与总结： 1_ 2._ 3. _ ought to （l）ought to+动词原形=should+动词原 形，表“义务”，“劝告”，“推测”。但比“should+ 动词原形”语气强。如： You ought to follow your fathers advice. 你应该听你爸爸的建议。 （2）“ought to+ have+过去分词”表过去本应该做而未做的情况；否定表示过去本不应该做而又做过的动作。 You oughtnt to have spoken to her in that way. 你不该那样对她讲话。 She ought to have had more consideration for you. 她应该多为你考虑。 dare，need 观察与思考； 1. How dare you say Im unfair? They said he dared not come. You need not have gone there yesterday. 2. Need they have done it yesterday? Yes, they must.(No,they neednt.) 3. You didnt need to come so early You neednt have come so early. 归纳与总结： 1. _ _ 2. _ 3. _ 比较neednt, m