(00 上海)
My sister met him at the Grand A Theatre yesterday, so he ______ your lecture. A. couldn’t have attended
B. needn’t have attended C. mustn’t have attended D. shouldn’t have attended
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Could 表可能性,语气较弱; 表请求,较委婉。 —Could you lend me some money? —Yes , I can. (98 上海) “ Could I call you by your first name?” C “ Yes, you _____. A. will B. could C. may D. might
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情态动词可用来表示推测,语气从强到弱的顺序是: must,should,can,could, may ,might。
一.情态动词表示推测的用法
1.must所表示的可能性最大,最有把握,意为“一
定”。
2.can和could主要用于否定句和疑问句中 ,can’t
或couldn’t 表示“不可能”
3.may 和 might表示现在或将来可能发生的动作
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(NMET 05)
B He ______ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside. B. must A. should C. wouldn’t D. can’t
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3. ● He may not have finished the exercises, I’m afraid. may/might have done(过去) 或许/可能做 …(用于肯定或否定句中) 4. You could have done better, but you didn’t try your best. could have done (过去) 本能够做 (用于肯定或否定句中,带有责备、劝告之意)