情態(tài)動詞表推測專項練習(xí)題

1、1. Look! The light is out in her room. Sheto 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 man aged to take me as well.It_ a comfortable journ ey.A. cant beB. shouldnt be C. mustnt have been D. couldnt have been3. My sister met hi

2、m at the Grand Theatre yesterday afternoon, so he _ your lecture.A. couldnt have attendedB. neednt have attendedC. mustnt have attendedD. shouldnt have attended4. You _ be tired - youve only been working for an hour.A. must notB. won tC. can tD. may not5. - Isn t that Anns husband over there?- No, i

3、t _ be him -Im sure he doesnt wear glasses.A. cantB. must notC. wontD. may not6. I was on the highway when this car went past followed by a police car. Theyat lease 150 kman hour.A. should have been doingB. must have been doingC. could have doneD. would have done7. He _ have completed his work; othe

4、rwise, he wouldnt be enjoying himself bythe seaside.A. should B. must C. wouldnt D. cant8. This cake is very sweet. You _ a lot of sugar in it.Ashould putBcould have putCmight put Dmust have put9.Tom is never late for work. Why is he absent today?Something _ to him.Amust happenCcould have happenedBs

5、hould have happenedDmust have happened情態(tài)動詞 must, can, could, may, might 情態(tài)動詞中的 must, can, could, may, might 性最大， can / could次之， may / might 最小。1. must 的用法（1） 表示推測“可能性”時， 意思是“一定、 準(zhǔn)是”， 語氣較肯定， 較有把握 He mustbe American. = It is certain that he is American. 他準(zhǔn)是個美國 人。（2）must 表推測只能用于肯定句。如果要表示“一定不、肯定不”的意思時，

6、應(yīng)用cant,如詢問某種可能時，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 myaddress? 他知道我的地址嗎？（詢問可能性）（3） must 表示推測時，可以推測現(xiàn)在/正在發(fā)生的動作/過去發(fā)生的動作。He must have a car now. （現(xiàn)在）他一定有輛小汽車。He must be doing his exercises in the classroom.（正在進行）他一定在教室里做練習(xí)。He must have fini

7、shed the work. （過去發(fā)生）他一定已完成了工作。注：must 表示推測時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意義的must 時，疑問部分的助動詞應(yīng)與 must 后面的動詞在非推測情況下的用法保持一致。He must be a worker, isnt he?（現(xiàn)在）他準(zhǔn)時個工人，是嗎？It must have rained last night, didnt it?（過去）昨晚一定下雨了，是不是？Y

8、ou must have learned English for many years, havent you?（完成時）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“可能性”時，往往用于否定句或疑問句 語氣很肯定。 can 在疑問句中意思是“會、可能”。He cant be at home. = It is impossible that he is at home.他一定不在家。（2） can /cant 后可接進行時 /完成時，表示對現(xiàn)在發(fā)生的動作或過去發(fā)生的 動作進行推測。They cant be reading in the library.

9、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意義的cant 時，疑問部分的助動詞應(yīng)與 cant 后面的動詞在非推測情況下的用法保持一致 .He cant be a teacher, is 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

10、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。表推測的用法都表推測。 其中 must 的可能 具體用法如下：Cant “一定不”，Dont eat it. It could be poiso nous.不要吃它，可能有毒。The plane could be delayed by fog. 飛機可能會因為霧晚點。（5） could 還可以用于表示客氣、委婉、禮貌的請求語氣。Excuse me, could you tell me the way to the bus station?Could you help me?（6） couldnt 表示否定推測，表示某事不

11、可能真實，或由于特定事實或環(huán)境某 事肯定不會發(fā)生。It couldnt possibly be poison.這不可能是毒藥。注：有時與形容詞的比較級連用強調(diào)某人或某物不可能再更多地具有某種屬性 Youcouldnt be more wrong. 你真是大錯特錯。I couldnt be happier. 我簡直是幸福極了。3.may 和 might 的用法（1）may, might 表示推測“可能性”時，意思是“可能”、“也許”，語氣 沒有must 肯定。He may / might be American. = It is possible that he is American. 他可能

12、是個美國人。注：might 不表示過去時態(tài)，只是語氣上比 may 更委婉，表示的可能性更小。（2） may, might 表推測時，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 可以推測現(xiàn)在正在發(fā)生的動作或過去發(fā)生的動作。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）這個男孩可能沒在家看電視These students may / migh