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1、高考英语语法讲解及练习 1) May Might Can Could I keep the book for a few days? Yes, you can. 否认形式可用may not, can not或must not，不用might not。 2)Visitors may not (或can not/mustnt) touch the button. 1) Cats can are able to climb trees very quickly. 2) A big fire broke out last night, but everyone was able to escape f
2、rom the house. 1) As there was no bus, we had to walk back home. (客观条件) 2) You mustnt shout like that to your parents. (不可以、不允许) 3) You dont have to neednt work if you dont feel well. 1) He looks pale. He be ill. 2) -Who it be? It (not) be Mr. Smith, for he has just left for Paris. -It be Mr. Brown,
3、 for he has something to discuss with me. 3) He said he didnt feel very well. He (not) e to the meeting this evening. (1.must 2. can, cant, must 3. maymight not) 1) He should be back by now. 他现在该回来了。 2) The teacher has explained it several times. There ought to be no problem for them. 4) A dog can be dangerous to you 狗可能给人带来危险。(有这种可能性) This dog is very clever. It may (或might/could) help you find your key. 这条狗非常聪明，他可能会帮助你找到钥匙。指详细的事有可能发生。
