情態(tài)動(dòng)詞表推測(cè)專項(xiàng)練習(xí)題[共3頁]

1、1. Look! The light is out in her room. She to bed already.A. must go B. had to go C.must have gone D.has gone2. There were already five people in the car but they managed to take me as well. It_ a comfortable journey.A. cant be B. shouldnt be C. mustnt have been D. couldnt have been3. My sister met

2、him at the Grand Theatre yesterday afternoon, so he _ your lecture.A. couldnt have attended B. neednt have attendedC. mustnt have attended D. shouldnt have attended4. You _ be tired - youve only been working for an hour.A. must not B. won t C. can t D. may not5. - Isn t that Anns husband over there?

3、- No, it _ be him -Im sure he doesnt wear glasses.A. cant B. must not C. wont D. may not6. I was on the highway when this car went past followed by a police car. They_ at lease 150 km an hour.A. should have been doing B. must have been doingC. could have done D. would have done7. He _ have completed

4、 his work; otherwise, he wouldn t be enjoying himself bythe seaside.A. should B. must C. wouldn t D. can t8. This cake is very sweet. You _ a lot of sugar in it.Ashould put Bcould have put Cmight put Dmust have put9. Tom is never late for work. Why is he absent today? Something _ to him.Amust happen

5、 Bshould have happenedCcould have happened Dmust have happened情態(tài)動(dòng)詞 must, can, could, may, might 表推測(cè)的用法情態(tài)動(dòng)詞中的 must, can, could, may, might 都表推測(cè)。其中 must 的可能性最大，can / could 次之，may / might 最小。具體用法如下：1. must 的用法（1）表示推測(cè)“可能性”時(shí)，意思是“一定、準(zhǔn)是”，語氣較肯定，較有把握He must be American. = It is certain that he is American. 他

6、準(zhǔn)是個(gè)美國(guó)人。（2）must 表推測(cè)只能用于肯定句。如果要表示“一定不、肯定不”的意思時(shí)，應(yīng)用 cant, 如詢問某種可能時(shí)，應(yīng)用 can。He must know my address. 他肯定知道我的地址。（一定）He cant know my address. 他肯定不知道我的地址。（一定不）Can he know my address? 他知道我的地址嗎？（詢問可能性）（3）must 表示推測(cè)時(shí)，可以推測(cè)現(xiàn)在 / 正在發(fā)生的動(dòng)作 / 過去發(fā)生的動(dòng)作。He must have a car now. （現(xiàn)在）他一定有輛小汽車。He must be doing his exercises i

7、n the classroom. （正在進(jìn)行）他一定在教室里做練習(xí)。He must have finished the work. （過去發(fā)生）他一定已完成了工作。注：must 表示推測(cè)時(shí)很少用于將來的情況。一般不用 He must come tomorrow.可用 Its certain / Im sure that he will come tomorrow.（4）在反意疑問句中，當(dāng)附屬部分含有表示推測(cè)意義的 must 時(shí)，疑問部分的助動(dòng)詞應(yīng)與 must 后面的動(dòng)詞在非推測(cè)情況下的用法保持一致。He must be a worker, isnt he? （現(xiàn)在）他準(zhǔn)時(shí)個(gè)工人，是嗎？It m

8、ust have rained last night, didnt it? （過去）昨晚一定下雨了，是不是？You must have learned English for many years, havent you? （完成時(shí)）你一定學(xué)了好多年英語，是嗎？2. can / could 的用法（1）can 表示推測(cè)“可能性”時(shí)，往往用于否定句或疑問句。 Cant“一定不”，語氣很肯定。 can 在疑問句中意思是“會(huì)、可能”。He cant be at home. = It is impossible that he is at home. 他一定不在家。（2）can /cant 后可接進(jìn)行

9、時(shí) / 完成時(shí)，表示對(duì)現(xiàn)在發(fā)生的動(dòng)作或過去發(fā)生的動(dòng)作進(jìn)行推測(cè)。They cant be reading in the library. 他們一定不在圖書館讀書。He cant have gone to Shanghai for I saw him a minute ago.他不可能去了上海，我剛才還看見他。Its so late. Where can she have gone? 天晚了，她可能去哪兒了呢？（3）在反意疑問句中，當(dāng)陳述部分含有表示推測(cè)意義的 cant 時(shí)，疑問部分的助動(dòng)詞應(yīng)與 cant 后面的動(dòng)詞在非推測(cè)情況下的用法保持一致 .He cant be a teacher, is

10、he? 他不是教師，是嗎？She cant have finished her homework, has she?她一定沒有完成家庭作業(yè)，是不是？（4）could 可用于表示某事有可能發(fā)生或可能是事實(shí)。Dont eat it. It could be poisonous. 不要吃它，可能有毒。The plane could be delayed by fog. 飛機(jī)可能會(huì)因?yàn)殪F晚點(diǎn)。（5）could 還可以用于表示客氣、委婉、禮貌的請(qǐng)求語氣。 Excuse me, could you tell me the way to the bus station?Could you help me?（

11、6）couldnt 表示否定推測(cè)，表示某事不可能真實(shí)，或由于特定事實(shí)或環(huán)境某事肯定不會(huì)發(fā)生。It couldnt possibly be poison. 這不可能是毒藥。注：有時(shí)與形容詞的比較級(jí)連用強(qiáng)調(diào)某人或某物不可能再更多地具有某種屬性You couldnt be more wrong. 你真是大錯(cuò)特錯(cuò)。I couldnt be happier. 我簡(jiǎn)直是幸福極了。3.may 和 might 的用法（1） may, might 表示推測(cè)“可能性”時(shí)，意思是“可能”、“也許”，語氣沒有 must 肯定。He may / might be American. = It is possible t

12、hat he is American.他可能是個(gè)美國(guó)人。注：might 不表示過去時(shí)態(tài)，只是語氣上比 may更委婉，表示的可能性更小。（2）may, might 表推測(cè)時(shí)，可以用于否定句，意思是“可能不、也許不”，但不用于疑問句。He may / might not be at home. 他也許不在家。（3）may, might 可以推測(cè)現(xiàn)在正在發(fā)生的動(dòng)作或過去發(fā)生的動(dòng)作。He may / might be sleeping now. （現(xiàn)在）他可能正在睡覺。The boy may / might not be watching TV at home. （現(xiàn)在）這個(gè)男孩可能沒在家看電視These students may / mi