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2022-02-17
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情态动词在虚拟语气中的用法表示推测或判断 情态动词表示推测或判断的用法 下表即是表示推测的情态动词使用的场合： 情态动词 对现在和未来的推测 对过去的推测 使 用 场 合 must + 动词原形 must+ have done 肯定句 may / might + 动词原形 May / might+ have done 肯定句、否定句 can /could +do Can / could+have done 否定句、疑问名（could可用于肯定句） should 用来表示一种估计的情况“按理会/估计会”should do/be should have done 肯定句、否定句、疑问句 例如： It must have rained last night. She may not be at home. = It is possible that she is not at home. She can’t be at home. = It is impossible that she is at home. They should be there right now. 人教版七年级英语单词 高中英语单词录音mp3 人教版高一英语单词表 情态动词在虚拟语气中的用法 情态动词用于虚拟语气中表示责备的感情色彩，用法如下： （1）should have done表示“本来应该做某事而实际上未做”，而shouldn’t have done则表示“本不应该做某事而实际上做了”。如： You should have told me about it earlier. You shouldn’t have said such words to your parents. （2）ought to have done也表示“本应该……”而ought not to have done则意为“本不应该……”。如： You ought to have told me about it earlier. You ought not to have said such words to your parents. （3）needn’t have done表示“本无必要做某事而实际上做了”。如： You needn’t have walked so quickly since time was enough. （4）could have done表示“本来有可能……而事实上未做到”。如： I could have come on time, but my car broke on the way. 精典名题导解 选择填空 1. I was really anxious about you. You________home without a word.(NMET 2001) A.mustn’t have B.shouldn’t have left C.couldn’t have left D.needn’t have 解析：答案为B。本题考查的是情态动词在虚拟语气中的用法。题目给出的条件是“我确实非常担心你”，因此后面可知应是责备you不应该没说一句话就离开了。 2.—Are you coming to Jeff’s party? —I’m not sure. I__________ go to the concert instead.(NMET 2000) A.must B.would C.should D.might 解析：答案为D。本题考查情态动词的基本用法。由题目中“I’m not sure”,表明我可能去Jeff’s party，也可能去音乐会，故用might。 3. —Will you stay for lunch? —Sorry, ____________. My brother is coming to see me.(NMET 99) A.I mustn’t B.I can’t C.I needn’t D.I won’t 解析：答案为B。本题考查表示请求的英语口语，用will来向第二人称提问的疑问结构，是表示一种请求和意愿，是用疑问的形式来表达较为婉转的祈使语气，意思是“请你……，好吗”，对于这种问句的肯定回答是：Suree! Gertainly! Yes, of course. I’d be glad to 等；否定回答通常是：I’m sorry, I can’t. No, I’m afraid I can’t. I’m sorry, but … I’d like to, but …等。注意情态动词表客气的用法及其在一般疑问句中的问与答。 
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