Section A-2_33826.ppt

* 本资料来自于资源最齐全的２１世纪教育网 Mr. Reed looks pale. He may be ill. (事实上的可能). Mr. Read is in poor health. He can be ill at any time. (逻辑、理论上的可能) This news may be true. (=might/could) (事实上的可能) Wang Wei can be really stubborn. (有时或偶然可能会)(=could) 否定句 This news may not be true. (也许不, =might not ) This news can’t be true. (不可能, =couldn’t) 疑问句 Can this news be true?(=Could) ≠May this news be true? (4) can 还可表示“能力”、“能够” —You can swim, can’t you? —No, I can’t. I can’t promise anything, but I’ll do what I can. Tickets can be bought from the Tourist Information Center. 2. might/could 分别为may和can的一般过去时，分别表示过去的“许可”、“可能”和“能力” 、“能够”等。 　The children asked whether they could/might go for a swim.(过去许可) I was afraid it might rain that afternoon. (过去可能) He asked if the news could be true. (过去可能)(Can the news be true?) She said he could speak several languages. (过去能力) I couldn’t find her telephone number. (过去能够) (2) 都可表示现在或将来的“可能性”。语气没有may肯定。 ①—There’s someone at the door. —It could/might(=may) be George. (肯定句) /It couldn’t (=can’t) be George.(否定句) /Could(=Can) it be George?(疑问句) ② According to the radio it could/might/ may rain tomorrow. ③ Lightning could (=can) be dangerous. (3) Might/Could I/we …? Could you …? 表示更委婉、更客气的请求。 ① —Might/Could I ask you one more question? —Yes, of course you may/might/can/ could. ② —Could you help me with these boxes? —Of course I can./With pleasure. 有时在陈述句中也表示更委婉、更客气的请求或邀请： —I wonder if I could/might leave now. —I don’t suppose you could/might. 3. can/be able to　 can= am/is/are able to = shall/will be able to ① No one can do it. =No one is able to do it. ② Can you come tonight? =Will you be able to come tonight? (2) could 表示过去的技能、本能; was/ were able to 表示过去某一具体场合经过努力而做成某事。 ① I could swim when I was six. ② He started late, but he was able to catch the eight o’clock train. =…but he m