高考英语复习：情态动词（二）

　　对过去事实的推测

　　对过去已发生事情的肯定推测常用 “must/may/might +have + v-ed”，“must+ have + v-ed”意思为“想必、准是、一定是”，语气非常肯定且只能用于肯定句，“may/might+ have + v-ed” 意思为“也许、或许”表示推测的把握不大，只能用于肯定或否定句，不用于疑问句;对过去的否定推测常用 “can/could /may’might not + have + v-ed”，意思为“不可能/可能没做过……”;对过去的疑问推测只用“can/could + have + v-ed”，意思为“可能已经……”。

　　例16：He _______ have completed his work; otherwise, he wouldn’t be enjoying himself by seaside. (2005北京)

　　A. should B. must C. wouldn’t D. can’t

　　分析：根据后一分句判断，前一分句应该表示肯定完成了工作，故用“must+ have + v-ed”意思为“想必、准是、一定是”，语气非常肯定且只能用于肯定句。答案为B。

　　例17：My sister met him at the Grand Theatre yesterday afternoon, so he _____ your lecture.(2000上海)

　　A. couldn’t have attended B. needn’t have attended

　　C. mustn’t have attended D. shouldn’t have attended

　　分析：must表推测时，不用于否定，needn’t have +v-ed 表示“本来没有必要”，shouldn’t have +v-ed表示“本来不应该”，“can/could not + have + v-ed” 意思为“不可能做过……”。故答案为A。

　　例18：--Do you know where David is? I couldn’t find him anywhere.

　　-- Well. He ______ have gone far----his coat’s still here.(2005湖北)

　　A. shouldn’t B. mustn’t C. can’t D. wouldn’t

　　分析：can’t have gone far 在此表示现在对过去所发生事情的否定推测，意思为“现在不可能走远了”;答案为C。

　　三、考查情态动词的虚拟用法

　　例19：—I’ll tell Mary about her new job tomorrow.

　　--You________ her last week. (2004福建)

　　A. ought to tell B. would have told C. must tell D. should have told

　　分析：对过去发生事情的责备或遗憾应用“情态动词+have + v-ed”，据此可排除答案A、C，而would+have +v-ed常用于过去的虚拟语气中，should(ought to)+ have + v-ed”表示本应该做某事而实际上没有做，含有责备的含义。其否定式表示某种行为不该发生但却发生了。故答案为D。

　　例20：He paid for a seat, when he ______ have entered free. (2005山东)

　　A. could B. would C. must D. need

　　分析：“could+ have + v-ed” 用于肯定句中，表示本来能够做成某事的但结果没能做成，含有遗憾的意味，侧重有能力而没能做成。该句意思为：“他花钱买了座位，而他本来可以免费进去的”。答案为A。

　　例21：You should not have swum in that river. You ____ have been eaten by fish.

　　A. must B. may C. will D. might

　　分析：前一分句的should not have swum表示责备，后一分句则表明有被鱼吃掉的可能性。“might+ have + v-ed” 用于肯定句中，表示本来有可能做成某事但结果没能做成，含有遗憾的意味，侧重有某种可能性但没能做成。

　　例22：—Catherine, I have cleaned the room for you.

　　—Thanks. You ______ it. I could manage it myself. (2005福建)

　　A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done

　　分析：“needn’t+ have + v-ed” 表示本来不必做某事而实际上做了某事，无批评责备之意，只是惋惜而已。如You needn’t have watered the flowers, for it is going to rain.你本不需要浇花的，因为天就要下雨了。答案为B。

　　准备建议

　　掌握情态动词的基本词义及其用法是把握情态动词 的关键，同时要认真比较每个情态动词的用法，注意其细微差别，如shall, can, must, should, will的用法差异;熟悉每个情态动词的适用场合，根据语境及说话人的语气选择恰当的情态动词，如用于推测时，must只用于肯定句中，can一般不能用 于肯定句中。may/might不能用于疑问句中;牢记情态动词表示推测的用法，尤其是对过去发生情况的推测;积累虚拟语气的用法，尤其是一些句势和特殊 情况。

　　06年展望

　　随着高考命题改革的深入，命题的角度和思路都在翻新，但不管怎样变化，还是脱离不了词的基本词义、词与词在使用上的细微差别和基本的语法框架。通过对近几年高考情态动词考点的分析、探究，可以看出高考对情态动词的考查非常稳定，即情态动词的基本用法和推测用法。高考考点的 “稳定性”告诉我们：高考英语命题是有规律的，不仅有规律，而且有很强的规律性。在复习迎考过程中，不仅要认真准备书本上成百上千的知识点(这是基础)，但更重要的还要去研究历届高诊断题中的重要考点(这是捷径)，提高复习效率。

　　情态动词考点透视

　　练兵场

　　1. Has it been warned that all the children in this area ____ stay at their homes until the Bird Flu has been controlled?

　　A. can B. willl C. may D. shall

　　2. I told Sally how to get here, but perhaps I ____ for her.

　　A. had to write it out B. must have written it out

　　C. should have written it out D. ought to write it out

　　3. Jack _____ yet, otherwise he would have telephoned me.

　　A. mustn’t have arrived B. shouldn’t have arrived

　　C. can’t have arrived D. needn’t have arrived

　　4. Sir, you ______be sitting in this waiting room. It is for women and children only.

　　A. mustn’t B. can’t C. won’t D. needn’t

　　5. The driver has drunk too much wine and dangerous things _____ happen at any time.

　　A. should B. can C. must D. need

　　6. — Is John coming by train?

　　— He should, but he _____ not. He likes driving his car.

　　A. must B. can C. need D. may

　　7. It has been announced that candidates _______ remain in their seats until all the papers have

　　been collected.

　　A. can B. will C. may D. shall

　　8. Why did you throw the bottle out of the window? You ____ somebody.

　　A. might hurt B. could have hurt C. would hurt D. must have hurt

　　9. —Don’t forget to come to my birthday party tomorrow.

　　—_______.

　　A. I don’t B. I won’t C. I can’t D. I haven’t

　　10. I didn’t see her in the meeting-room this morning. She ______ at the meeting.

　　A. mustn’t have spoken B. shouldn’t have spoken

　　C. needn’t have spoken D. couldn’t have spoken

　　11.—Summer Holiday is drawing near. Are you going home for the holiday?

　　—I haven’t decided yet. I ______ go home, but it depends on the weather.

　　A. must B. need C. may D. will

　　12. This couple had been separated twenty years, you _____imagine how happy they were when they met again.

　　A. might B. will C. can D. must

　　13. We ______last night, but we went to the concert instead.

　　A. must have studied B. might study

　　C. should have studied D. would study

　　14. She _____ listen to records, alone in her room for hours. We just won’t interrupt her, for we know this is her usual way to stay in peace.

　　A. might B. must C. will D. should

　　15. -–Well done, Tom!

　　-- Thanks, but given me more time, I ___ it much better.

　　A. shouldn’t have done B. should have done

　　C. might not do D. could have done

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