高中情态动词讲解

合集下载

高中英语语法情态动词与虚拟语气讲解

高中英语语法情态动词与虚拟语气讲解

高中英语语法情态动词与虚拟语气讲解情态动词的基本用法情态动词具有一定的词义,没有人称和数的变化,必须和其他动词一起构成谓语,用来表示愿望、态度或推测等。

1.表示能力(2)表示将来的能力:will be able to(3)表示过去的能力I can't promise anything, but I'll do what I can.我不能许诺什么,但我会尽力而为。

(表示现在的能力)The fire spread through the hotel very quickly but everyone was able to get out.尽管这场大火迅速蔓延到了这个宾馆,但是每个人都逃了出去。

(表示过去有能力做并且成功地做了)I could have worked out the problem, but I was too nervous.我本来可以解出这道题,但我太紧张了。

(表示本来有能力做但未做)2.表示推测(可能性)可能性可分为客观的可能性和具体事情实际发生的可能性两种。

(1)客观的可能性并不表示具体某事是否会发生,而用来说明人或事物的特征。

情态动词can可用于肯定句中表示客观的(或理论的)可能性,而表示具体事情实际发生的可能性时, can 一般不用于肯定句。

Accidents can happen on such rainy days.在这样的多雨天气里可能会发生事故。

(表示客观的可能性)We may go to the cinema tonight, but we are not sure yet.今晚我们可能去看电影,但还没确定。

(表示实际可能性,不用can)(2)表示具体事情实际发生的可能性表示具体事情实际发生的可能性的层次(由强及弱)比较:①在肯定句中表示推测(must/have to, should/ought to, may, might, could)a.当说话者表达怀疑或犹豫之意时,需用may, might或could, 其中might, could比may所表达的怀疑或犹豫之意更强。

高中英语 情态动词用法归纳全.ppt

高中英语  情态动词用法归纳全.ppt
情态动词用法归纳
情态动词无人称和数的变化;不能单独 使用,必须与其后的动词原形构成谓语
一、 can, could
1) 表示能力(体力、知识、技能)。 Can you lift this heavy box?(体力) Mary can speak three languages.(知识) Can you skate?(技能) 此时可用be able to代替。 Can只有一般现在时和一般过去式;而be able to则有
2. He doesn’t dare (to) answer.
3. He needs to finish his homework today.
五、 shall, should
1) shall 用于第一人称,征求对方的意见。
What shall we do this evening?
2) shall 用于第二、三人称,表示说话人给对方的命令、警告、 允诺或威胁。
七、should, ought to
1) should, ought to表示“应该”,ought to表示义务或责任, 比should语气重。
1. I should help her because she is in trouble.
2. You ought to take care of the baby.
1. You shall fail if you don’t work hard.(警告) 2. He shall have the book when I finish it.(允诺) 3. He shall be punished.(威胁)
六、 will, would
1) 表示请求、建议等,would更委婉。 Will / Would you pass me the ball, please? 2) 表示意志、愿望和决心。 1. I will never do that again. 2. They asked him if he would go abroad.

高中英语语法讲义-情态动词

高中英语语法讲义-情态动词
② 后接动词进行式,表示动作正在进行或将要发生:
He may [might] be writing a letter. 他可能在写信。
They may [might] be going abroad next month. 他们可能在下个月出国。
③ 后接动词完成式,表示对过去可能发生的事进行推测:
另外,could还可与表示感知的动词(如see, hear, smell, taste, feel, understand等)连用表示的特定能力:
Looking down from the plane, we could see lights on the runway. 从飞机上向下看,我们可以看见机场跑道上的点点灯火。
2) 表示委婉的批评或责备:
You might have made greater progress. 你的进步本来可更大一些的。
You might at least have answered my letter. 你至少可以回我一封信嘛。
③ 表示“差点儿就要”:
I could have died laughing. 我差点儿笑死了。
二、may与might的用法
1. 表示允许
注意以下两种情况:
(1) 表示请求允许(即请求别人允许自己做某事),两者都可用,只是 might 表示的语气较委婉(但并不表示过去):
May [Might] I sit here? 我可以坐在这里吗?
1) 表示过去某事可能发生而实际上却并没发生:
A lot of men died who might have been saved.很多人本来可以获救的却死了。
It was really very dangerous. I might have killed myself. 那真的是太危险了,我差点没命了。

高一英语英语必修Unit语法情态动词课件

高一英语英语必修Unit语法情态动词课件
No, you needn’t./you don’t have to. ★mustn‘t 表禁止,不准,一定不要。 You mustn't play with fire. You mustn't take drugs.
The guest may arrive this afternoon. ---Can he attend the meeting?
---Yes, he_m__a_y. I am not sure.
3. 表示祝愿,位于句首 eg. May you succeed! May you have a good journey!
5.must的主要用法
1. 必须。must表主观“必须” have to 表客观“不得不”
I must go home this Saturday. I’ve got a cold, so I have to see a doctor. ---Must I stay here? ---Yes, you must./
• 情态动词的特点: 1.情态动词自身都有一定的意义, 但不能表示正在发生或已经发生的 事情,只表示期待或估计某事发生。 2.情态动词除ought和have外,后 面必须接不带to的不定式。 3.情态动词没有人称和数的变化, 也没有非谓语形式。
1. can和could
1. can的主要用法是: A. 表能力
eg. The girl can dance very well. be able to 通过努力做成某事 He was able to reach Mount Qomolangma in 2000. B. 表示说话者的推测﹑事物的可能性:(否、疑) eg. Can the news be true? C. 在口语中, can可以表示请求或允许:

高中英语语法讲解: 情态动词

高中英语语法讲解: 情态动词

高中英语语法讲解:情态动词概述1.共有10个情态动词:can/could, may/might, will/would, shall, should, ought to, must;2个半情态动词need, dare2.特点:(1)情态动词后加动词原形(即不带to的不定式)一起构成谓语;(2)没有人称和数的变化;(3)多数情态动词有过去式,但其过去式有时并不表示时态,而只起“委婉或不确定语气”的作用。

Would you do me a favour? She may/might be watering the flowers now.3.情态动词在句子中可发挥不同作用,如表能力,表责任与义务,表推测,表征求允许,表请求,表建议,表语气态度等等He can/could run 100 meters in 11 seconds.You should/ought to/must work hard to win a gold medal.Can/Could/May/Might I watch the Olympics tonight?Will/Can/Could/Would you help me with my training?He might/may/could/should/ought to/will/must watch the football match tonight.I suggest that you should watch the opening ceremony.Can this be true?4.情态动词+do 表对一般现在或将来情况的推测情态动词+ be doing 表对正在发生的事情的推测情态动词+have done 表对过去已经发生的事情的推测一、can/could 的用法1.表能力(1) can do现在一般的能力(2) could do过去一般的能力(3) could have done过去有能力做但没做具体某事(4)was/were able to do = managed to do/ succeeded in doing 过去有能力做且做了具体某事。

情态动词高中知识点高三

情态动词高中知识点高三

情态动词高中知识点高三情态动词是一类具有特殊意义和用法的动词,它们在句子中一般与实义动词连用,表示说话人的推测、命令、请求、建议等情态。

在高中英语学习中,掌握情态动词的正确用法至关重要。

本文将介绍情态动词的相关知识点,帮助高三学生更好地运用这一语法现象。

一、情态动词的定义情态动词,又称情态助动词,是用来表示说话人对某种动作或状态的态度、推测、可能性、能力、意愿、义务等情态的一类特殊动词。

常见的情态动词包括can、could、may、might、must、shall、should、will、would等。

二、情态动词的用法1. 表示能力情态动词can表示某人具有能力或可能做某事,could用于过去说法。

例如:- She can speak three languages fluently.(她能说流利的三种语言)- He could lift the heavy boxes when he was younger.(他年轻时能搬起这些沉重的箱子)2. 表示推测和可能性情态动词may、might、could用于表示推测和可能性。

may用于表示较为肯定的推测,might和could表示推测的可能性较小。

例如:- The weather is cloudy, it may rain later.(天气多云,可能会下雨)- He might be late for the meeting.(他可能会迟到会议)3. 表示义务和建议情态动词must表示说话人对某种行为具有强烈的责任感或坚决要求,should表示建议。

例如:- We must obey the laws of the country.(我们必须遵守国家的法律)- You should apologize to your friend for your mistake.(你应该为你的错误向朋友道歉)4. 表示许可和请求情态动词can、may、could用于表示允许和请求。

高中必修一情态动词用法总结

高中必修一情态动词用法总结

3.may/might have done 表示对过去发生过的事情的推测, 意为“可能已经做过某事”
Eg: I can’t find my sunglasses. I may/might have left them in your office.
4. may/ might as well + 动词原形 “…还是…的好” “不妨干某事” Eg: You may as well go and have a look.
5. shall
1. Shall用于第一、三人称的疑问句中,表示说话人征 求对方的意见或请求。 Eg: 1) Shall we begin our discussion? 2) Shall I change the clothes for the child? 3) Shall Tom go there with me tomorrow? 4) Henry is waiting outside. Shall he come in?
can/be able to
can表示“能够”时与短语be able to同义,
但can只用于一般现在时或过去时,而后
者可用于各种时态。另外,can表示个人

有某种能力,而be able to表示某人通过努
力、克服困难做成某事,相当于succeed in
doing sth.;
B be a policeman, for he’s much too short. 1. Michael ____ A. needn’t B. can’t C. should D. may A it be 2. Mr. Bush is on time for everything. How ____ that he was late for the opening ceremony? A. can B. should C. may D. must 3. ---- I stayed at a hotel while in New York. ---- Oh, did you? You ____ A with Barbara. A. could have stayed B. could stay C. would stay D. must have stayed 4. My sister met him at the Grand Theater yesterday A your lecture. afternoon, so he ____ A. couldn’t have attended B. needn’t have attended C. mustn’t have attended D. shouldn’t have attended

情态动词知识点总结高中

情态动词知识点总结高中

情态动词知识点总结高中情态动词是英语中一个重要的语法现象,它们能够表达说话者的情感、态度、意愿等,以及表达说话者对事件的推测、猜测、可能性等。

了解情态动词的用法,能够帮助我们更准确地表达自己的意思,也有助于我们理解他人的意图。

本文将对情态动词的概念、用法、以及常见的情态动词进行总结和归纳,以便于读者更深入地理解情态动词的使用。

一、情态动词的概念情态动词(Modal Verb)是一类特殊的助动词,用来表示说话者的情感、态度、意愿等,以及表达说话者对事件的推测、猜测、可能性等。

情态动词通常用于句子的前面,后面跟动词原形,用来构成不同的语法结构和表达不同的含义。

英语中常见的情态动词有can、could、may、might、must、shall、should、will、would、ought to等。

这些情态动词具有一些共同的特点,比如不能独立完成谓语,后面必须跟动词原形;在疑问句和否定句中,情态动词的位置要发生变化等。

二、情态动词的用法1. 表示能力和可能性can与could表示说话者的能力或者对某种事情的可能性,其中can用于现在时,could用于过去时。

比如:I can speak Spanish.(我会说西班牙语。

)She could swim when she was five.(她五岁的时候就会游泳。

)may与might也表示可能性,may 用于现在时,might 用于过去时。

比如:It may rain tomorrow.(明天可能会下雨。

)I thought she might come.(我以为她可能会来。

)2. 表示请求和建议will与would可以表示请求,will用于肯定句,would用于否定句和疑问句。

比如:Will you please help me?(你能帮帮我吗?)I would like to go with you.(我想和你一起去。

)shall与should也可以表示请求或者建议,should更多地表示建议。

高考英语情态动词讲解

高考英语情态动词讲解

高考英语情态动词讲解公司内部编号:(GOOD-TMMT-MMUT-UUPTY-UUYY-DTTI-(一)情态动词常考点(一)表能力如:I am starving to death。

I can eat two bowls of rice now。

(现在的能力)我快饿死了,现在我能吃两碗米饭。

If you have a good sleep,you will be able to work out this problem。

(将来的能力)如果你好好睡一觉,你将能够解出这道题。

The fire spread through the hotel very quickly but everyone was able to get out。

(过去有能力做并且成功的做了某事)尽管这场大火迅速蔓延到了整个宾馆,但是每个人都能够逃出去。

I could have worked out the problem,but I didn’t。

(过去有能力做但未做)我本来可以解决这个问题,但没有解决。

(二)表推测(可能性)1.可能性可分为客观的可能性和具体事情实际发生的可能性两种。

所谓客观的(理论的)可能性即并不涉及具体某事是否会发生,此种用法常常可以说明人或事物的特征。

情态动词can可用于肯定句中表示客观的(理论的)可能性,而表示具体事情实际发生的可能性时,can一般不用于肯定句。

如:Accident can happen on such rainy days。

这样的多雨天气有可能会发生事故。

(客观的可能性)Peter may come with us tonight,but he isn’t sure yet。

彼得今晚可能和我们来,但他还没确定。

(实际可能性,不用can)2.表示具体事情实际发生的可能性:这可能是他做的吗?Mr. Bush is on time for everything。

How can it be that he was late for the opening ceremony?(表示疑惑、惊讶)布什先生做每件事都很按时。

高中英语情态动词详解(强推)

高中英语情态动词详解(强推)

can ,could 用在肯定句中表示理论上的可能性, “经验之谈”
As a human being, anyone can make a mistake. can ,could用在疑问句中表推测,表示可能性
Can she be in the classroom?
can ,could用在否定句中表推测,翻译成“不 可能 ”
大家好
1
Modal verbs
情态动词
2
常用的情态动词
can (could) may(might) shall(should) will (would)
must dare (dared) need
have to ought to be able to used to
3
The features(特点) of the modal verbs:
A. can B. will C. may D. shall
2. —Excuse me, but I want to use your
computer to type a report.
—You ___ have my computer if you don’t take
care of it.
A. shan’t
1. 情态动词本身有词义, 但词义不完全. 2. 不能单独作谓语,只能和动词原形一起构成谓语. 3. 情态动词没有人称和数的变化( 除“have to”).
4H.e没ca有n不/co定ul式d/、mVus-itn/mga、y/Vm-eigdh形t/s式ha.ll/ should/need/dare/dared/will/would/ought to/ used to + work in that factory.

高中英语知识点归纳情态动词的可能性和可能

高中英语知识点归纳情态动词的可能性和可能

高中英语知识点归纳情态动词的可能性和可能高中英语知识点归纳:情态动词的可能性和可能情态动词(Modal Verbs)是英语中的一类特殊动词,在句子中具有特殊的语法和语义功能。

情态动词可以用来表示说话人对行为发生的态度、目的、意愿、建议等。

本文将对情态动词中的“可能性”和“可能”进行归纳总结。

一、表示“可能性”的情态动词1. can“can”是最常见的情态动词,表示某事有可能发生,或某人有能力做某事。

例如:- You can join us if you want.(如果你愿意,你可以加入我们。

) - It can be difficult to learn a new language.(学一门新语言可能会很难。

)2. may“may”表示某件事情有可能发生,但还不确定。

例如:- She may be right.(她可能是对的。

)- It may rain tomorrow.(明天可能会下雨。

)3. might“might”用法与“may”的类似,表示某事有可能发生,但程度更低。

例如:- We might go to the beach this weekend.(我们可能会在这个周末去海滩。

)- He might not be able to attend the meeting.(他可能不能参加会议。

)4. could“could”表示过去或将来某个时间能够发生的可能性。

例如:- I could swim when I was five.(我五岁的时候会游泳。

)- We could have a picnic if the weather is good.(如果天气好的话,我们可以去野餐。

)二、表示“可能”的情态动词1. must“must”表示某事几乎肯定会发生,或某种可能性非常高。

例如:- He must be tired after running a marathon.(跑完马拉松后他一定很累。

(完整版)高考情态动词讲解

(完整版)高考情态动词讲解

语法专题(三)情态动词考点归纳考点一:情态动词表示能力1.表现在的或一般的能力:表示现在的或一般的能力用can或be able to,can 比be able to 使用得更普遍。

can 侧重指有能力做某事;而be able to更强调通过努力、克服困难做成某事。

A computer can't think for itself ;it must be told what to do.He is a native speaker of English,so he can of course speak English quite well.2.表示将来的能力:表示将来能力用will be able to。

If you have a good sleep,you will be able to work out this problem.如果你睡个好觉,你就能做出这道题。

3.表示过去的能力:could 表示过去一般的能力,即不表示做或未做某事;而was (were) able to do则表示过去有能力并且成功地做了某事,相当于managed to do something/succeeded in doing somethin。

g考点二:情态动词表示推测(可能性)可能性可分为客观的(理论的)可能性和具体事情实际发生的可能性。

1.客观的(理论的)可能性指并不涉及具体某事是否会发生,此种用法常常可以说明人或事物的特征。

can 用于肯定句中表示客观的(理论的)可能性,can用于疑问及否定句中则表示实际发生的可能性。

The World Wide Web is sometimes jokingly called the World Wide Wait because it can be very slow.A left- luggage office is a place where bags can be left for a short time,especially in a railway station.2.表示具体事情实际发生的可能性:表示具体事情实际发生的可能性的这些词后接动词原形是对现在事情的推测,后接完成式则表示对过去事情的推测;其中can,may/might,should,ought to,must 有时还可接进行时表示对现在正在进行的事情的推测。

高中英语情态动词详细讲解及例句

高中英语情态动词详细讲解及例句

一、情态动词无人称和数的变化,不能单独做谓语,只能和行为动词或状态动词构成谓语二、情态动词分为:情态助动词:can(could)、may(might)、must、have to (had to )、ought to 、shall(should)、will(would) 12个半情态助动词:dare、need、used to、had better、would better(5个)三、情态助动词1.can and could1)ability:be able to do /manage to do/succeed in doing sth.eg.The army can defeat their enemy.eg.The army is able to defeat their enemy.eg.The army succeed in defeating their enemy.2)permission:eg.Can I smoke here?eg.You can’t smoke here.3)possibility:用在否定句、疑问句、感叹句中-eg.This can’t be done by him.当被用在肯定句中时,表达的是理论上的可能性,不涉及是否真的会发生eg.even expert drives can make mistakes.要表达现在或者将来的可能性,用may /might或could.eg.I may leave for Beijing next month.但在特殊疑问句中,或与副词hardly、only等连用的陈述句中表达可能性只用can/couldEg.where can the noise be coming from?eg.It can hardly be the postman,he comes only in the morning.4)有时会:the road can be blocked.5)could 表示轻微的怀疑或委婉的看法I’m sorry I couldn’t lend you the book now.His story could be true,but I hardly think it is.6)could 表示委婉的请求,主要用于疑问句,不用于肯定句Could you lend me some money?Yes,I can /No,I am afraid not.7)could 的常用结构:could+动词+比较级“非常,再.....不过了”It couldn’t be better.Couldn’t +过去分词+比较级“非常,再.....不过了”They couldn’t have tried harder to make me eel welcome.Can’t..too..=can never too“无论怎样...也不为过,越...越好”I can’t thank you too much.I owe my progress to you.Can’t (help/choose) but do/can but +动词原形“不得不,只好”We can but agree with him.Can’t help doing 忍不住,不得不I can’t help laughingCan’t be (it) 控制不住,没有办法It can’t be helpedCan’t....without 没有...就不能One can’t succeed without perseverance.2.may and might1)permission:May I use your pen?Yes,you may./No,you may not.2)Possibility:用于推测,表示不确定,不用于疑问句中She may know Tom’s address.出现I’m afraid.I’m not sure等表示不确定时,常用may/might.I’m afraid he might not come to attend the meeting today.从语气上判断,may表示的可能性比might 大,might更多的表示怀疑He may be very busy now.He might be very busy now.3)用于让步状语从句中However hard you may study,you cannot master English in a month.4)用于祈使句,表示祝愿May you succeed!5)might 常用于表示轻微的责备和委婉的请求You might post the letter for me if you are going near a post box.You might have let me know before!6)习惯用法:may as well do”理所当然,有足够的理由”She may be proud of her sonMay /might (just) as well do=had better do(最好)You might as well stay at home tonight.May/might as well+do A+as+do+B”与其做B不如做A”You might as well throw the money away as lend it to him.One may as well not know a thing at all as know it but imperfectly3.must and have to1)表示义务,一定要,必须You must arrive in good time.The meeting is very important.2)表示肯定性或难以避免,必然会,肯定会All men must die.3)must 表示有把握的推测,一定是,准时Must do/must be doing/must have doneThe tall fellow must be a basketball player.Let’s have something.You must be starving.He must have received mu letter which has mailed last week.4)must 表示非要,偏要,常以第二人称为主语,意指不耐或令人不愉快的事情,用于其他人称,表示主语固执,意为偏偏Why must you buy that car?Jane was never a pleasant young girl.After you gave her your advice,she must goand do the opposite.5)must 的三种否定形式表示不可能must be --can’t be must have done--can’t have doneYou must have met him before.You can’t have met him before.表示不必must do--need not to/don’t have toWe must get up at six tomorrow morning.We don’t have to get up at six tomorrow morning.表示决不能,严禁must--mustn’tYou mustn’t park your car here.6)回答以must提问的句子Must we clean all the rooms?Yes ,you must/No ,you don’t have to/No ,you needn’t7)must 可做名词,表示必须有的东西,必须做的事Warm clothes are a must in the mountains.8)must和have to 表示必须时,有一下差别Must 表示的是说话人主观的看法,而have to则往往强调客观需要The play is not interesting ,I really must go now.I have to work when I was your age.Must 一般只表现在,have to 则有更多的时态。

高中英语语法:情态动词的详解大总结

高中英语语法:情态动词的详解大总结

高中英语语法:情态动词的详解大总结一、can和could1、can的用法(1)表示体力和脑力方面的能力。

(2)表示对现在的动作或状态进行主观的猜测,主要用在否定句和疑问句中。

(3)表示可能性,理论上的可能性,意为“有时候可能会”,可用于肯定句。

(4)表示允许,意思与may接近。

(5)表示说话人的推测、怀疑、惊异、猜测或不肯定等,主要用于否定句、疑问句或感叹句中。

(6)can的特殊句型cannot…too / enough表示“无论怎么...也不过分”“越...越好”cannot but+ do sth.表示“不得不,只好”2、could的用法(1)表示能力,指的是过去时间。

(2)表示允许,指的是过去时间。

(3)表示可能,可以指过去时间,也可以指现在时间,表示语气缓和。

(4)委婉客气地提出问题或陈述看法,指的是现在时间。

主要用于疑问句,回答时用can。

3、can与could的区别can表推测时只用于否定句和疑问句(could无此限制)。

couldn’t的可能性比can’t小。

4、can与be able to的区别(1)现在时:无区别,但后者不常用。

(2)完成时;can没有完成时,此时要用have (has,had)been able to。

(3)将来时:can没有将来时,要用will be able to。

(4)过去时:could表示一般能力,was/were able to 表示在具体场合通过努力成功做成某事的能力。

二、may 和might1、may的用法(1)表示询问或说明一件事可不可以做。

(2)表示一件事或许会发生或某种情况可能会存在,通常用在肯定句和否定句中。

注意:表示可能性时,can’t语气强,表示“不可能”,may not语气弱,表示“可能不”。

2、might的用法(1)表示询问或允许,指的是过去时间。

(2)表示可能发生的事,可以指过去时间,也可以指现在时间,语气更加不肯定,可能性比may小一些。

高中英语语法之情态动词

高中英语语法之情态动词

高中英语语法之情态动词一、概念情态动词是表示能力,义务,必须,猜测等说话人的语气或情态的动词。

二、相关知识点精讲1.can1)表能力can 表能力时意味着凭体力或脑力或技术等可以无甚阻力地去做某事。

I can climb this pole.我能爬这根杆子。

He is only four , but he can read.他只有4岁,但已认得字了。

Fir e can’t destroy gold.火烧不毁金子。

因为 can 不能和其他助动词连用,所以表示将来式时用will be able to。

You will be able to skate after you have practiced it two or three times.你练习两三次后就会溜冰了。

2)表可能性多用于否定与疑问结构中,但也可用在肯定句中。

Can the news be true?这消息可能是真的吗?It can’t be true.它不可能是真的。

What can he possibly mean?他可能是什么意思?can 用在肯定句中表示理论上的可能性(一时的可能)。

Attending the ball can be very exciting.The road can be blocked.这条路可能会不通的。

may 在肯定句中表示现实的可能性。

The road may be blocked.这条路可能不通了。

3)表示允许(和 may 意思相近)常见于口语。

Can (May) I come in ?我能进来吗?Can I smoke here ?我可以在这里抽烟吗?2.could 的用法1)表过去的可能和许可,(多用于间接引语中)At that time we thought the story could not be true.那时我们认为所说的事不可能是真的。

Father said I could swim in the river.爸爸说我可以在河里游泳。

高中情态动词用法讲解

高中情态动词用法讲解

Modal Verbs情态动词的推测性用法和非推测性用法情态动词一般有两种用法:推测性用法(epistemic use) 和非推测性用法(non-epistemic use) 。

推测性用法是指做出推测,预测事物发生的可能性; 非推测性用法则指情态动词本身的基本含义,如can表示能力,may表示许可,must和should表示必须和义务,need 表示需要等。

例如:I can swim. (非推测性用法)This can be true. (推测性用法)You may go now. (非推测性用法)He may be ill now. (推测性用法)You must finish it before lunch time. (非推测性用法) He must be at home for he never goes out at dinner time. (推测性用法)我们把英语中的9大情态动词按其推测性和非推测性用法列表如下:情态动词非推测性用法的说明I. can和could1. 表示能力Whales cannot live on land.We can skate.◆区别can, could, be able to表能力的区别。

1) can表示现在或将来的能力,could作为can的过去式,表示过去的能力;2) be able to有多种时态和人称的变化,表示具有完成某事能力的同时,完成了某事。

Luckily, they were able to escape from the big fire. (有能力逃脱,且成功逃脱)They could escape from the big fire. (有能力逃脱,但是否成功逃脱不清楚)2) 表示请求(疑问句),允许(陈述句)Can I smoke here?You can use my dictionary now.The policeman says we can't park our car here.◆表请求和允许时,can和could的区别:1. could是can的过去式形式。

高中英语情态动词各种用法课件(共47张PPT)

高中英语情态动词各种用法课件(共47张PPT)

一 、表能力 :表现在的或一般的能力:表示 现在的或一般的能力用can 或 be able to. 一 般的能力是指你无论什么时候做什么事情就 能做到的能力。表示现在的能力或一般的能 力时,can比be able to 更普遍。
A computer can’t think for itself; it must be told what to do. (表示一般的能力)
This can’t / couldn’t be done by him. (表示不 相信)
He could be on his way home now. (could 不 如 may / might常用)
Can this be done by him? (表示一种疑惑、 惊讶)
(3)would, could, should, might 并不一定 与过去的时间有关,而是表示可能性弱于他 们相应的现在形式。如:
do something / succeeded in doing sth.
The fire spread through the hotel very
quickly but everyone was able to get out. (过去有能力并成功地做了某事)
(3) could have + 过去分词,表示过去有 能力做但未做。
表示对过去已经发生的行为进行推测,意为 “想必 / 准是/ 一定做了某事
It must have rained last night, for the road was quite muddy.
The lights were out. They must have been asleep.
2. can have done

高中英语2025届高考语法复习情态动词与虚拟语气知识讲解

高中英语2025届高考语法复习情态动词与虚拟语气知识讲解

高考英语语法复习情态动词与虚拟语气知识讲解一、情态动词(1)表示能力时,can只用于一般现在时,could仅用于一般过去时;而be able to则有更多的时态,如将来时、完成时等。

I haven’t been able to read that report yet.He will be able to skate as well as you.(2)Was/were able to表示能力时,侧重经过努力而成功做到某事;而could仅表示具备能力,不说明是否实施了能力。

He studied hard and was able to pass the exam.(3)用在其他动词,如might,may,would,want,hope等之后表示能力只能用be able to。

He might be able to fix your car.(1)must还可以表示质问或感情色彩,意为“偏要,偏偏”。

Why must it snow on Saturday?(2)should还可以表示惊奇、愤怒、失望等特殊情感,尤其用在以why,who,how等开头的疑问句中或某些感叹句中。

why should you be so late today?(1)must作“必须”讲的一般疑问句,其肯定回答用must,否定回答用needn’t或don’t have to。

-Must I pay now?-Yes, you must./No, you needn’t.(2)need还可以作实义动词,有人称和数的变化,后跟带to的不定式作宾语。

She needed to go out for a walk.(1)两者在表示过去的习惯动作或行为时常可通用。

When we were children, we would/used to go skating every winter.(2)Used to与would都不能与表示具体频率、次数的词及特定的时间状语或具体的一段时间连用。

高中英语情态动词详解(强推)

高中英语情态动词详解(强推)
第二十二页,共67页。
1. should= ought to 表示劝告,建议,意为“ 应该〞, ought to 语气更强些,强调“有责任,有义务 做〞
A: I’ll start the work tomorrow. B: I think you should start today.
C: No, you ought to start at once. (语气更强〕
A. can B. will C. may D. shall
2. —Excuse me, but I want to use your computer to type
a report.
—You ___ have my computer if you don’t take care of
it.
A. shan’t
A. need B. must C. may D. will
第十五页,共67页。
2. must表示肯定的推测。 The light is still on, so he must be at home.
Look at his new car. He ______ have a lot of money.
B. might not
C. needn’t
D. shouldn’t
第二十一页,共67页。
3). shall用于条约,规定,规章等文件中,
表示一种义务,多用于第三人称中。
“The interest 〔利益〕 ___ be divided into five parts, according to the agreement made by both sides.〞 declared the judge. A. may B. should C. must D. shall
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

情态动词专项讲解1. China is developing its high-speed train technology fast, so it _____be good enough to catch up with the best.A. mayB. mightC. mustD. should2. Then some other interesting reasons appear, such as “It's so smoggy that I ______find my way to office."A. mustn’tB. won’tC. can’tD. shouldn’t3. "The world is big, and I want to see it," wrote a teacher in her resignation letter. _____ you quit your job to travel the world?A. MustB. MightC. ShouldD. Would【答案揭晓】CCD一、情态动词的定义情态动词是一种本身有一定的词义,但要与动词原形或其被动语态一起使用,给谓语动词增添情态色彩,表示说话人对有关行为或事物的态度和看法,认为其可能.应该或必要等。

情态动词后面加动词原形。

1. No driving electric motorbikes in some areas is a rule that we shall obey in Fuzhou.必须.一定(法律.法规等)动词原形2. Women who are exposed to second-hand smoke during their pregnancy can be at risk of abortion.能,会,可以(表示有能力或机会) 动词原形二、常考情态动词的关键用法(一) can1. -Jim,it is time you went to bed.You need to get up early tomorrow.-It’s not fair,Mary can stay up till ten hut I have to go to bed at eight.可以(表示允许)2.If it were not for the fact that she can't sing,I would invite her to the party.能,会,可以(表示有能力)3. Luckily, iron can be reworked and mistakes don't have to be thrown away能够,可以(表示某事物的特点)4.Peter can be really difficult to get along with at times even though he’s a nice person in general.有可能;有时会5. I cannot choose but to go.不能,无法(用于否定句,表示情况不允许)6.I cannot thank you enough,it has been a wonderful day.再.....也不为过( 也可以用can never/hardly.....too much)7.—Is Jack on duty today?—It can't be him.It’s his turn tomorrow.不可能(can可用于否定句/疑问句中表猜测,此句表对现在的猜测)8.—Can he have been chosen as captain of the football team? —Yes, he must have.可能(can可用于否定句/疑问句中表猜测,can have done表示对过去的猜测猜测)9. This old lady was struggling out of the train and I said, 'Oh, can I help you?'能(通常用于疑问句,表示建议或提议帮忙)10. Can you just lift the table for a second?(用于疑问句时,can 表示礼貌的请求,而can't 表示强烈请求)(二) could1.For my return journey, I felt I could afford the extra and travel first class能;会(表示发生在过去的能力)2.–I feel bored with nothing interesting to do.--You could watch TV. There will be a very good Hollywood film on this evening.可以(表示提议或建议)3. –Could I have a look? --Of course you can.表许可(委婉的语气用could,回答时用can)4. An improvement in living standards could be years away.可能(表示某事可能属实或可能发生,对将来或者现在发生事情的肯定猜测)5.When the ship sailed out from Thailand, the 16 sailors on board couldn't have thought_ that only half of可能(could have done,只用于否定句和疑问句中,表示对过去发生事情的猜测)them would return again. 高.考.资.源.网6. He did not regret saying what he did but felt that he could have expressed it differently.(could have done用于肯定句中,表虚拟语气,表示过去本有可能发生的事情但却并未发生,不能使用can’t have done的形式)(三)be able to1.Even if standardized tests like the SAT could show a stude nt’s academic proficiency(学业水平),they will never be able to test things like confidence, efforts and willpower, and are unable to give us the full picture of a student’s potentialities(潜力)【解析】be able to 解释为“能够”,有各种时态的形式。

注:can 和be able to 都可以表示能力.can泛指一般的能力,而且只有两种形式,即:can, could.be able to 则主要指具体做到了某件事的能力,其形式主要是靠be 发生变化,所以形式比can 多.可以说:I can swim. I am able to swim.但是不能说:All the people could escape from the big fire in time.只能说:All the people were able to escape from the fire in time.(四) may1.Every one of us may plant a tree in the school, or organize a thorough cleaning on the campus.可以(表许可)2. (1)Some people who don’t like to talk much are not necessarily shy;they may just be quiet people.有可能,也许(may表猜测,用于肯定或否定句中,此例表示对现在某种情况的猜测)(2)You might just as well tell the manufacturer that male customers may not like the design of the furniture.也许,可能(may表猜测,用于肯定或否定句中,may not 为“可能不”的意思)(3)I can’t find my purse anywhere.—You may have lost it while shopping.(may表猜测,may have done表示对过去或者现现在已经完成的动作的肯定猜测)3.May God bless you!祝;但愿(五) might1.I was wondering if I might ask you a favor?可不可以,能否(用于礼貌地打断别人.提出问题.做出请求或引出接下来要说的话)2.—Excuse me.Is this the right way to the Summer Palace? —Sorry,I am not sure.But it might be.可能(表不是很有把握的猜测,语气比may 弱)3.—Where is my dictionary? I remember I put it here yesterday.—You might have put it in the wrong place.(might表猜测,might have done则表示对过去或者现已完成的动作的肯定猜测=may have done)4. I told your friend how to get to the hotel,but perhaps I might have driven her there.(此处,might have done表虚拟语气,意为“过去原本可能/可以做到的事而未做”)5.This holiday isn’t much fun; we might\may as well be back home.只好(做);(做…)也无妨(六) will1.The low test score, they think, will make it impossible for them to get into a good college.将(表示将来)2.You will carry out these instructions and report back into this afternoon.(表示将来的正式安排)3.He will become her senior adviser--- her deputy, if you will.愿意4.-----Anyone, answer the phone? ------ I will.临时的决定5. Mary will sit for hours reading.The window will not open, however hard he tries.表现在经常反复的动作或者趋向6. Man will die without air.表必然性(七) would1.John promised his doctor he would not smoke,and he has never smoked ever since.(will 的过去式,用于转述)将2.Hurry up! It would be a shame to miss the beginning of the play.She’d be a fool to accept it.将,将会(表示判断或看法)3.She wouldn’t change it even though she knew it was wrong.不愿(表示意愿)4.When he had a problem to solve,he would work at it until he found an answer.常常(表示过去的习惯)She would be always the first to offer to help.The car wouldn’t start this morning.老是,总是(表趋向)(八) shall1.We/I shall call you back this afternoon.(表将来用于No.1人称)2.--- Has Mr. Tom White arrived? --- Yes, already. Shall he wait outside or just come in?(shall用在疑问句中,且主语为No.1/No.3人称,表示征求对方意见)3.(1)—What does the sign over there read?—“No person shall smoke or carry a lighted cigarette,cigar or pipe in this area.”(2)“The interest s hall be divided into five parts,according to the agreement made by both sides,”declared thejudge.(3)You shall get the answer tomorrow.(4)They shall not be allowed in after 11 p.m.(shall用在陈述句中,且主语为No.2/No.3人称时,表示允诺、命令、警告、决心或规定)(九) should/ought to1.—I think I’ll give Bob a ring.—You should. You haven’t been in touch with him for ages.应该;应当2. (1) —Margaret should not stay at home all day long in front of the TV.应该,必须(表示给出指示或公布官方命令)(2) —That' s right.She ought to go to the fitness center with us.应该,必须3.There should not be any difficulty about passing the road test since you have practised a lot.应该,可能(表示预期或可能性)4.If you should be fired, your health and pension benefits will not be automatically cut off将要,假定要(用在虚拟条件从句中表示事件发生的可能性)5.I insisted that we should have a look at every car应该(用在某些动词、名词之后that引导的虚拟语气从句中)6. It’s surprising/strange that he should be a thief.竟然(用在某些adj./n. 之后that 引导的虚拟语气中)7.—I’ll tell Mary about her new job tomorrow.—You should have told her last week.(should have done=ought to have done,表示本应该做的事而未做)8.You oughtn’t to have been late for yesterday’S class meeting,as it was so important.(ought not to have done=should not have done,表示过去本不该做的事却做了)注:ought to与should的用法区别如下1. 一般说来,两者可替换,只是ought to语气稍重。

相关文档
最新文档