情態(tài)動(dòng)詞推測(cè)用法精講精練

1、 情態(tài)動(dòng)詞推測(cè)用法情態(tài)動(dòng)詞推測(cè)用法 一、用法一、用法 從高考及平時(shí)各類考試情態(tài)動(dòng)詞的推測(cè)用法來看，主要有must, should, can (could), may(might)幾個(gè)詞，現(xiàn)對(duì)它們的用法按可能性從大到小排列列表如下：一般式：must/ should/ can/ could/ may/ might do sth.進(jìn)行式： must/ should/ can/ could/ may/ might be doing sth.完成式： must/ should/ can/ could/ may/ might have done sth.注：對(duì)現(xiàn)在和過去的狀態(tài)進(jìn)行推測(cè)則分別將注：對(duì)現(xiàn)在和過

2、去的狀態(tài)進(jìn)行推測(cè)則分別將do sth.和和have done sth.改為改為“be +表語(yǔ)表語(yǔ)”和和“have been +表語(yǔ)表語(yǔ)”形式。形式。 二、關(guān)鍵點(diǎn)撥二、關(guān)鍵點(diǎn)撥 1表推測(cè)時(shí)，表推測(cè)時(shí)，might不是不是may的過去式，的過去式，could不是不是can的的過去時(shí)，而是表示過去時(shí)，而是表示might/ could的可能性比的可能性比may/ can還小，還小，所以，上述情態(tài)動(dòng)詞的過去式并不表示對(duì)過去的情況進(jìn)行所以，上述情態(tài)動(dòng)詞的過去式并不表示對(duì)過去的情況進(jìn)行推測(cè)。推測(cè)。 2should表示根據(jù)事物內(nèi)在發(fā)展的規(guī)律、事情發(fā)展的必然表示根據(jù)事物內(nèi)在發(fā)展的規(guī)律、事情發(fā)展的必然性得出的結(jié)論，

3、表示性得出的結(jié)論，表示“某人（某事）按道理應(yīng)該（理某人（某事）按道理應(yīng)該（理應(yīng)）應(yīng)）”。 3can/ could常用于否定句和疑問句中表示推測(cè)，但在表常用于否定句和疑問句中表示推測(cè)，但在表示示“有時(shí)候可能有時(shí)候可能”或或“從理論上講從理論上講”時(shí)，也可用于肯定句時(shí)，也可用于肯定句中。中。 4may/ might not用于否定句中表用于否定句中表“可能不可能不”，而不是，而不是“不可能不可能”。 三、實(shí)例助記三、實(shí)例助記 1現(xiàn)在（正在進(jìn)行）的動(dòng)作或狀態(tài)現(xiàn)在（正在進(jìn)行）的動(dòng)作或狀態(tài) There shouldnt be any difficulty about passing the road t

4、est since you have practiced a lot in the driving school. （2005上海）因?yàn)槟阍隈{校已經(jīng)進(jìn)行了大量的實(shí)上海）因?yàn)槟阍隈{校已經(jīng)進(jìn)行了大量的實(shí)習(xí)，按道理你通過路考是沒有任何問題的。習(xí)，按道理你通過路考是沒有任何問題的。 Helen may go on the trip with us, but she isnt quite sure yet.（2005安徽）海倫可能會(huì)和我們一起去旅行，但安徽）海倫可能會(huì)和我們一起去旅行，但她現(xiàn)在還不確定。她現(xiàn)在還不確定。 The World Wide Web is sometimes jokingly c

5、alled the World Wide Wait because it can be very slow. （2005浙江）由于萬(wàn)維網(wǎng)有時(shí)可能速度很慢，所以人們有時(shí)戲稱浙江）由于萬(wàn)維網(wǎng)有時(shí)可能速度很慢，所以人們有時(shí)戲稱之為之為World Wide Wait。 Someone is knocking at the door. Who can it be? 有人有人在敲門。可能是誰(shuí)呢？在敲門。可能是誰(shuí)呢？ Hurry up! They must be waiting for us at the school gate. 快點(diǎn)！他們一定在校門口等我們呢?？禳c(diǎn)！他們一定在校門口等我們呢。 2過去（正

6、在進(jìn)行）的動(dòng)作或狀態(tài)過去（正在進(jìn)行）的動(dòng)作或狀態(tài) Tom is never late for work. Why is he absent today? 湯姆從不上班不遲到。為何他今天沒來？湯姆從不上班不遲到。為何他今天沒來？ Something must have happened to him.（2005江西）江西）他一定發(fā)生了什么事。他一定發(fā)生了什么事。 I was on the highway when this car went past followed by a police car. They must have been doing at least 150 kilomete

7、rs an hour. （2005重慶）我當(dāng)時(shí)正在公路上行駛，重慶）我當(dāng)時(shí)正在公路上行駛，突然這輛小汽車超過，后面跟著一輛警車。他們當(dāng)時(shí)一定是突然這輛小汽車超過，后面跟著一輛警車。他們當(dāng)時(shí)一定是在以至少每小時(shí)在以至少每小時(shí)150公里的時(shí)速行駛。公里的時(shí)速行駛。 Do you know where David is? I couldnt find him anywhere. 你知道大衛(wèi)在哪里嗎？我到處找不到他。你知道大衛(wèi)在哪里嗎？我到處找不到他。 Well . He cant have gone farhis coats still here.（2005湖北）噢。他不可能走遠(yuǎn)的湖北）噢。他不可能

8、走遠(yuǎn)的他的外套還在這兒。他的外套還在這兒。 I cant find my dictionary. Li Hong may have taken it away. 我找不著字典了。李紅可能拿走了。我找不著字典了。李紅可能拿走了。 1. He _ have completed his work; otherwise, he wouldnt be enjoying himself by the seaside. (2005北京卷) A. shouldB. must C. wouldntD. cant 2. This cake is very sweet. You _ a lot of sugar i

9、n it.（2005遼寧卷）A. should putB. could have putC. might putD. must have put 3. Is John coming by train? He should, but he _ not. He likes driving his car. (NMET2002) A. mustB. canC. needD. may 4. My English-Chinese dictionary has disappeared. Who _ have taken it?（2003上海春季） A. shouldB. mustC. couldD. wo

10、uld 5. When can I come for the photos? I need them tomorrow afternoon. They _ be ready by 12:00.（NMET1998） A. canB. shouldC. mightD. need 6. Isnt that Anns husband over there? No, it _ be himIm sure he doesnt wear glasses.（NMET2004） A. cantB. must notC. wont D. may not 7. Excuse me. Is this the righ

11、t way to the Summer Palace? Sorry, I am not sure. But it _ be.（2004湖北）湖北） A. mightB. willC. mustD. can 8. My sister met him at the Grand Theatre yesterday afternoon, so he _ your lecture.（2000上海）上海） A. couldnt have attended B. neednt have attended C. mustnt have attended D. shouldnt have attended 9. Sorry, Im late. I _ have turned off the alarm clock a