高中英语句型之情态动词

　　一、高中英语句型must+have+ED分词：用于肯定句，表示对过去情况的一种肯定揣测，表示“肯定，一定”

　　1) It around nine o’clock when I drove back home because it was already dark.

　　［A］ had to be

　　［B］ must have been CopyRight .com

　　［C］ was to be

　　［D］ must be CopyRight .com

　　2) John’s score on the test is the highest in the class;

　　［A］ he should study last night 内容来自

　　［B］ he should have studied last night CopyRight .com

　　［C］ he must have studied last night

　　［D］ he must had to study last night CopyRight .com

　　3) After searching ［A］ for evidence in the house,the police concluded ［B］ that the thief must have come in ［C］ through the window and stole ［D］ the silver while the family was asleep. CopyRight .com

　　二、高中英语句型may (might)+have+ED分词：用于肯定句和否定句，表示对已发生事件的不肯定的揣摩，相当于“可能，大略，”其中might较may 语气更弱，控制更小

　　She might have gone to see her doctor last week, but I am not sure.上星期或者她去看医生了，但我不敢肯定。 内容来自

　　Don’t worry， your husband may not have been hurt seriously. 别急，你丈夫兴许伤得不厉害。

　　三、高中英语句型should(ought to)+have+ED分词：肯定句表示过去本应发生的事却没有发生；否定句表示已发生了本不该发生的事。前者可译为“本应，”后者为“本不该”

　　You should have apologized to her for not soon replying to the letter. 你本应向她道歉，说明为什么没能及时回信。(可你没这么做)

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　　4) You yesterday if you were really serious about your work. 内容来自

　　［A］ ought to come 内容来自

　　［B］ ought to be coming

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　　［C］ ought to have come CopyRight .com

　　［D］ ought have come

　　四、高中英语句型can(not) +have+ED分词

　　He is an hour late —— He can have been delayed by fog. Of course,that’s a possibility.他迟到了1小时，可能因为大雾而延误了。当然这只是可能性问题。

　　The poem can not have been written by her since she was only five years old then.这诗不可能是她写的，因为她那时才5岁。

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　　五、高中英语句型“could+have+ED分词”有时用于表示过去的时间，说明某事可能或不可能已产生；有时可表示过去本来可以做某事，但却未做

　　I simply can’t understand how he could have made such a mistake. 我简直不明白他怎么会犯那样的错误。

　　He walked there,but he could have taken a taxi. 他走着去了，可当时完整可以坐出租。

　　“couldn’t+have+ED分词”还表示无论如何也不可能或不做到

　　I couldn’t have called you. I wasn’t near a telephone. 反正我也不可能给你打电话，我附近不电话。 CopyRight .com

　　5) “We didn’t see him at the lecture yesterday.”“He it.” 内容来自

　　［A］ mustn’t attended

　　［B］ couldn't have attended CopyRight .com

　　［C］ would have not attended

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　　［D］ needn’t have attended

　　六、高中英语句型needn’t+have+ED分词：表示对过去不必做的事件却做了，可译为“实在不用”

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　　6) You all these parcels yourself.The shop would have delivered them if you had asked a shop assistant. 

　　［A］ didn’t need to carry

　　［B］ needn’t have carried CopyRight .com

　　［C］ needn’t carry CopyRight .com

　　［D］ didn’t need carry

　　七、高中英语句型used to 表示过去的习惯动作或状态，现在已不存在，在否定陈述句中，畸形用didn't use to，也可用used not to；在疑难句中用“Did…use to”。used to还可与never,often,always等连用。留心used to与be used to的不同，后者表示be accustomed to “习惯于某种状况”，而且跟接名词或ING形式，而used to后接动词原形，试比拟 CopyRight .com

　　He used to drink. 表示“他过去时常喝酒”而现在不喝了。

　　He is used to wine (He is used to drinking wine) at each meal. 表示“他现在已养成习惯，每顿饭喝点葡萄酒。”

　　八、高中英语句型had better表现“最好……”，后接动词原形，其否认式为had better not＋动词本相

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　　You had better not follow his behavior. 你最好不要学他。 CopyRight .com

　　九、高中英语句型would rather 意思是“情愿”，表示决定。它有两种用法，

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　　一是在断定句中后边直接跟动词原形，其否定句是在would rather 后加not,即 would rather not＋动词原形；

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　　二是它后边可以跟接从句，该从句的谓语动词用个别过去式表示虚拟语气。因为would rather表示取舍，它后边可跟接than CopyRight .com

　　She would rather sleep than talk rubbish. 她宁愿睡不愿闲聊。 内容来自

　　7) “Did you criticize him for his mistakes?”——“Yes,but it.”

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　　［A］ I’d rather not do

　　［B］ I’d rather not doing

　　［C］ I’d rather not have done

　　［D］ I’d rather not did

　　［注］ would rather和had rather都表示“宁愿”，在用法上也没有差异。但如果说would rather与had rather完全一样(Longman Dictionary of Comtemporary English 如是说)，这一说法有争议。切实had rather在古代尺度英语中几乎已经不必了。这对咱们考试来说是比较重要的，因为个别考题作为标准英语是不必had rather的。 内容来自

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