初中情态动词表推测的用法及练习(经典)
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初中英语语法之表推测情态动词用法和练习英语中有不少情态动词都可以表示推测,其语气有强有弱,表示的可能性有大有小,现将它们的用法归纳如下:1. 接近100%的可能这当然只有must才具有这么高的可能性,它的意思是“一定”“肯定”,所作出的推测几乎接近事实。
如:That hat must be Tom’s. 那帽子一定是汤姆的。
He must be coming by bus. 他一定是乘公共汽车来。
2. 很有可能表示可能性较大的情态动词主要有may, should, ought to,它们大致相当于汉语的“可能”“应该”“按理会”。
如:She should [ought to] be here soon. 她应该很快就到。
We may be buying a new house. 我们可能要买一座新房子。
3. 一般性的可能在所有表示推测的情态动词中,might和could所表示的可能性最小,由于它们的语气较委婉,较不确定,所以往往相当于汉语的“可能”“也许”“说不定”等。
如:He might be waiting for you. 他可能在等你。
She might not like the idea. 她或许会不赞成这个想法。
We could all be millionaires one day. 我们有一天可能都成为百万富翁。
4. 理论上的可能性表示理论上的可能通常是用can,且可以用于肯定句中。
如:Food poisoning can cause death. 食物中毒可导致死亡。
This kind of thing can happen every now and then. 这种事情是随时可能发生的。
New England can be very hot in September. 新英格兰有时9月份很热。
所谓理论上的可能性,就是指仅从理论上去考虑其可能性,至于实际情况如何,则不作考虑,比如说“食物中毒可导致死亡”,这只是理论上的一种推断,至于某人某次食物中毒了,他是否会死亡,则不在考虑之列,所以说,这种推测是非常“宏观”的!5. 表示对过去情况作推测如果表示对已经发生的情况作推测,不能用“情态动词+动词原形”,也不能用“情态动词的过去式+动词原形”,而是要使用“情态动词+动词完成式”。
中考英语情态动词推测基础练习题40题(带答案)1.There is a loud noise coming from the next room. It must be Tom. He is the only one there.A.must beB.can't beC.could beD.might be答案解析:A。
“must be”表示肯定的推测,根据题干中“There is a loud noise coming from the next room. He is the only one there.”可知,有很大的噪音从隔壁房间传来,并且他是那里唯一的一个人,所以可以肯定是汤姆。
“can't be”表示否定的推测,不符合题意;“could be”和“might be”表示可能性较小的推测,也不符合题意。
2.The book on the table isn't mine. It can't be mine.A.must beB.can't beC.could beD.might be答案解析:B。
“can't be”表示否定的推测,根据题干“The book on the table isn't mine.”可知,桌子上的书不是我的,所以用“can't be”。
“must be”表示肯定的推测,不符合题意;“could be”和“might be”表示可能性较小的推测,也不符合题意。
3.Look at that girl. She is singing so beautifully. She could be aprofessional singer.A.must beB.can't beC.could beD.might be答案解析:C。
“could be”表示可能性较大的推测,根据题干“Look at that girl. She is singing so beautifully.”可知,那个女孩唱歌很好听,有可能是专业歌手。
情态动词表推测用法总结及专项练习第一篇:情态动词表推测用法总结及专项练习情态动词表推测用法总结及专项练习1.can / could用于表推测的用法(1)从使用句型上看,can 通常只用于否定句或疑问句,一般不用于肯定句,而could 可用于肯定句、否定句和疑问句。
两者没有时间上的差别,只是could 比 can 更委婉,更不确定。
如:It can’t [couldn’t] be true.那不可能是真的。
What can [could] they be doing? 他们会在干什么呢? We could go there this summer.今年夏天我们可能要去那儿。
注:can 有时也用于肯定句中表示推测,主要用于表示理论上的可能性(即从理论上看是可能的,但实际未必会发生),或表示“有时”之意。
如:Even experienced teachers can make mistakes.即使是有经验的教师也可能出错。
She can be very unpleasant.她有时很令人讨厌。
(2)从时间关系看,对现在或将来情况作推测,后接动词原形;对正在进行的情况作推测,后接 be doing 结构;对过去情况作推测,后接动词完成式。
如:He could have gone home.他可能已经回家了。
He can’t [couldn’t] have understood.他不可能理解了。
Why does he know this? Can [Could] someone have told him about it? 他怎么知道? 会是哪个人告诉他了吗?(3)“could+完成式”除表示对过去的推测外,还有以下重要用法:① 表示过去没有实现的可能性,常译为“本来可以”。
如: I could have lent you the money.Why didn’t you ask me? 我本来可以借这笔钱给你的。
初一英语情态动词推测用法练习题40题含答案解析1.There must be a lot of students in the library. It's very quiet.must becan't bemight becould be答案解析:must be。
“must be”表示肯定的推测,意思是“一定是”。
图书馆很安静,通常情况下安静的地方可能有很多学生在学习,所以用“must be”比较合理。
“can't be”表示否定的推测,不符合题意。
“might be”和“could be”表示可能性较小的推测,没有“must be”肯定。
2.The boy in the classroom must be Tom. He is the only one who wears a blue shirt today.must becan't bemight becould be答案解析:must be。
题干中明确指出男孩是唯一穿蓝色衬衫的人,所以肯定是Tom,用“must be”。
“can't be”否定推测不符合。
“might be”和“could be”可能性小,不如“must be”确定。
3.There must be some books on the desk. I saw the teacher put them there.must becan't bemight becould be答案解析:must be。
看到老师把书放在桌子上了,所以肯定有书在桌子上,用“must be”。
“can't be”不对。
“might be”和“could be”表示不确定,这里已经确定看到老师放书了。
4.The girl who is singing must be Lily. She has a beautiful voice.must becan't bemight becould be答案解析:must be。
初一英语情态动词推测用法练习题30题(带答案)1. The door is open. Someone ____ be in the room.A.mustB.canC.mayD.could答案解析:C。
“must”表示肯定的推测,语气非常强;“can”表示理论上的可能性;“may”表示有可能,语气较弱;“could”表示过去的可能性或委婉语气。
在这个场景中,门开着只能说明可能有人在房间,所以选择“may”。
2. There is a lot of noise coming from the classroom. The students ____ be having a discussion.A.mustB.canC.mayD.could答案解析:A。
“must”在这里表示比较肯定的推测,因为有很多噪音从教室传来,很有可能是学生们在进行讨论。
“can”和“could”表示可能性较小,“may”语气较弱。
3. Tom is not in the classroom. He ____ be in the library.A.mustB.canD.could答案解析:C。
“may”表示有可能,因为汤姆不在教室,只是有可能在图书馆,不能确定,所以选择“may”。
“must”语气太强,“can”和“could”也不太符合这个场景。
4. The light in the office is on. Someone ____ be working there.A.mustB.canC.mayD.could答案解析:C。
灯亮着只能说明有可能有人在办公室工作,“may”语气较弱,符合这个场景。
“must”太肯定,“can”和“could”也不太恰当。
5. There are some footprints on the ground. Someone ____ have walked here.A.mustB.canC.mayD.could答案解析:C。
(一)情态动词表推测的1.在肯定句中一般用 must (一定),may (可能),might (也许,或许)。
( 1 ) The photo must be Lu ’s, those must be their parents.( 2 ) The policeman may know the way to that school.( 3 ) The notebook may belong to Jim, it ’s on his desk.( 4 ) If you have any idea where it might be, please call me.2.否定句中用 can’t / couldn’t(不可能 ), may not/might not( 可能不)。
( 1 )It can’t/couldn’t be the headmaster. He has gone to America.这不可能是校长,他去美国了。
(2 ) The doctor may not/might not be in the hospital now,It’s nearly six o’clock.3.疑问句中用 can/could (能……?)。
( 1 ) Could he have finished the task?他可能把任务完成了吗?( 2 ) Can he be at home now?他现在能在家吗?注:以上三种句式中情态动词的语气按程度都是依次递减的。
might, could 并非 may, can 的过去式,而表示语气较为委婉或可能性较小。
(二)情态动词表推测的1.对现在正在进行的动作推测时,用“情态动词 + be +doing”。
例: He must / may / might / could be listening to the radio now. 他一定/可能/ 也许正在听收音机。
九年级英语表推测语气的讲解与练习表推测时,英语中只使用must,may,might,may not和can't。
这五个表达的语气依次递减:情态动词must, can, could, may, might表推测的用法情态动词中的must, can, could, may, might都表推测。
其中must的可能性最大,can / could次之,may / might最小。
具体用法如下:1.must的用法(1)表示推测“可能性”时,意思是“一定、准是”,语气较肯定,较有把握。
He must be American. = It is certain that he is American. 他准是个美国人。
(2)must表推测只能用于肯定句。
如果要表示“一定不、肯定不”的意思时,应用can’t,如询问某种可能时,应用can。
He must know my address. 他肯定知道我的地址。
(一定)He can’t know my address. 他肯定不知道我的地址。
(一定不)Can he know my address? 他知道我的地址吗?(询问可能性)(3)must表示推测时,可以推测现在/正在发生的动作/过去发生的动作。
He must have a car now. (现在)他一定有辆小汽车。
He must be doing his exercises in the classroom.(正在进行)他一定在教室里做练习。
He must have finished the work.(过去发生)他一定已完成了工作。
注:must表示推测时很少用于将来的情况。
一般不用He must come tomorrow.可用It`s certain / I’m sure that he will come tomorrow.(4)在反意疑问句中,当附属部分含有表示推测意义的must时,疑问部分的助动词应与must 后面的动词在非推测情况下的用法保持一致。
情表推的用法(一)情表推的三种句式(can 不肯 , may不must肯定不否)1.在肯定句中一般用must (一定 ), may(可能), might (也,或)。
(1) The photo must be Lu ’s, those must be their parents.(2) The policeman may know the way to that school.(3) The notebook may belong to Jim, it ’s on his desk.(4) If you have any idea where it might be, please call me.2.否定句中用can ’ t / couldn 不可’能t(), may not/might not( 可能不 )。
(1) It can ’t/couldn’t be the headmaster. He has gone to America.不可能是校,他去美国了。
(2) The doctor may not/might not be in the hospital now, It’s nearly six o’clock.3.疑句中用can/could ( 能⋯⋯ ?)。
(1) Could he have finished the task?他可能把任完成了?(2) Can he be at home now?他在能在家?注:以上三种句式中情的气按程度都是依次减的。
might, could并非may, can的去式,而表示气委婉或可能性小。
(二)情表推的三种1.在正在行的作推,用“情+ be +doing ”。
/可能 /也正在听收音例: He must / may / might / could be listening to the radio now.他一定机。
2.一般情况的推,“情+ 原形”。
表推测的情态动词及其用法以下是 7 条关于表推测的情态动词及其用法:1. “might”,它就像一个小小的猜测小精灵。
比如说,“It might rain later.”(等会儿可能会下雨。
),就像你觉得天上有点阴阴的,感觉可能会下雨,但又不是特别肯定。
2. “could”呀,可神奇了呢!就像“ He could be at the park.” (他可能在公园呢。
),你觉得他有在公园的可能性,但又不是百分之一百确定。
3. “may”呢,是个不太确定的小天使哟!“She may come to the party.”(她也许会来参加聚会。
),是不是感觉你抱有希望她会来,但又不敢打包票呀?4. “must”这个家伙很肯定哦!“He must be very tired.”(他一定很累。
),就好像从一些迹象能明显感觉到他就是很累,没有别的可能啦。
5. “should”有时候就像是一个合理的推测!比如“ They should behere by now.” (他们现在应该到这儿了。
),是那种根据正常情况推测的感觉呀。
6. “would”就像一种假设的可能性。
像“ I would go if I had the time.” (要是我有时间我就会去。
),你懂那种如果怎样就会怎样的感觉吧?7. “ought to”也很有用呢。
“We ought to have more food for the party.”(我们应该为聚会准备更多食物。
),是不是感觉根据常理应该这么做呀?我觉得啊,这些情态动词让我们的表达更丰富、更灵活,能更好地传达我们心中那种不确定或者推测的感觉,真是太奇妙啦!。
情态动词表推测的用法
(一)情态动词表推测的三种句式(can不肯, may 不问must 肯定不否问)
1.在肯定句中一般用must (一定),may(可能),might (也许,或许)。
(1)The photo must be Lu’s, those must be their parents.
(2)The policeman may know the way to that school.
(3)The notebook may belong to Jim, it’s on his desk.
(4)If you have any idea where it might be, please call me.
2.否定句中用can’t / couldn’t(不可能), may not/might not(可能不)。
(1)It can’t/couldn’t be the headmaster. He has gone to America.
这不可能是校长,他去美国了。
(2)The doctor may not/might not be in the hospital now, It’s nearly six o’clock.
3.疑问句中用can/could (能……?)。
(1)Could he have finished the task?
他可能把任务完成了吗?
(2)Can he be at home now?
他现在能在家吗?
注:以上三种句式中情态动词的语气按程度都是依次递减的。
might, could并非may, can的过去式,而表示语气较为委婉或可能性较小。
(二)情态动词表推测的三种时态
1.对现在正在进行的动作推测时,用“情态动词+ be +doing”。
例:He must / may / might / could be listening to the radio now. 他一定/可能/也许正在听收音机。
2.对一般情况的推测,“情态动词+ 动词原形”。
(1)He can’t ( couldn’t ) / may ( might ) not be at home at this time.
这个时候他不可能/可能不在家。
(2)Mr. Bush is on time for everything,he can’t (could n’t) be late for the meeting布什先生一向准时,这次会议他不可能迟到。
3.对过去情况的推测,用“情态动词+ have +过去分词”。
(1)It must / may / might / could have rained last night .The ground is wet.
地湿了,昨晚肯定/可能/也许下雨了。
(2)The door was locked. He can ( could ) not / may ( might ) not have been at home .
门锁着,他不可能/可能不在家。
(3)Can / Could he have gotten the book?
难道他找到书了吗?
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 gone
2. We had a wonderful time yesterday. You ———— .Why didn't you come?
A. had to come
B.should have come
C.might have come
D.must have come
3. ─There were already five people in the car but they managed to take me as well.
─ It______ a comfortable journey.
A. can't be
B. shouldn't be
C. mustn't have been
D. couldn't have been
4. My sister met him at the Grand Theatre yesterday afternoon, so he ___ your lecture.
A. couldn't have attended
B. needn't have attended
C. mustn't have attended
D. shouldn't have attended
5. I was really anxious about you. You _____ home without a word.
A. mustn't leave
B. Shouldn't have left
C. Couldn't have left
D. needn't leave
6. Oh, I’m not feeling well in the stomach,I_____ so much fried chicken just now.
A. s houldn’t cut
B. mustn’t have eaten
C. shouldn’t have eaten
D. mustn’t eat
7. Mr.White _____ at 8:30 for the meeting, but he didn’t’ show up.
A. should have arrived
B. should arrive
C. should have had arrived
D. should be arriving
8. You ______ be tired - you've only been working for an hour.
A. must not
B. won' t
C. can' t
D. may not
9. - Isn' t that Ann's husband over there?
- No, it _______ be him -I'm sure he doesn't wear glasses.
A. can't
B. must not
C. won't
D. may not
10. There ____ be any difficulty about passing the road test since you have practised a lot in the driving school.
A . mustn’t B. shan’t C. shouldn’t D.needn’t
11. 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 doing
C. could have done
D. would have done
12. He _____ have completed his work; otherwi se, he wouldn’t be enjoying himself by the seaside.
A. should
B. must
C. wouldn’t
D. can’t
13. ---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties!
A. may go through
B. might go through
C. ought to have gone through
D. must have gone through
14. This cake is very sweet. You __________ a lot of sugar in it.
A.should put B.could have put C.might put D.must have put
15. —Catherine, I have cleaned the room for you.
—Thanks. You it. I could manage it myself.
A.needn’t do B.needn’t have done C.mustn’t do D.shouldn’t have done 16.—Tom is never late for work. Why is he absent today?
—Something ________ to him.
A.must happen B.should have happened
C.could have happened D.must have happened。