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外研版英语八年级上册Module12 情态动词can和could的用法区别

外研版英语八年级上册Module12 情态动词can和could的用法区别
外研版英语八年级上册Module12 情态动词can和could的用法区别

情态动词can和could的用法区别

一、情态动词can的用法

1. 表示能力,意思是:能,会。如:

I can't swim. 我不会游泳。

Can you drive?你会开车吗?

2. 表示客观可能性,意思是:可以,可能。如:

That big cinema can seat 2,000 people.

那家大电影院能坐2000人。

He can be very friendly at times.

有时他会很友好。

3. 表示允许(和may意思相近),意思是:可以,能够。如:

You can have the book when I have finished it. 书我看完了可以给你。Can I use your pen?我可以用你的钢笔吗?

4. 表示惊异、不相信等(用于疑问句、否定句或感叹句中),意思是:会,可能。如:

This can't be true. 这不可能是真的。

Can it be true?这可能是真的吗?

二、情态动词could的用法

1. 表示“能力”或“可能性”,作为can的过去形式。如:

Could you speak English then?那时你能讲英语吗?

He said he couldn't follow me.他说他跟不上我。

2. 表示惊异、怀疑、不相信等情绪。如:

Who could have taken them?谁会把它们拿走了呢?

She couldn't have left so soon. 她不可能这么快就走了。

在这种情况下,could和can是可以换用的,用could时口气较缓和,用can时不相信的程度更强一些,两者在时间上没有差别。

3. 比较委婉客气地提出问题或陈述看法。如:

—Could you let me have your passport?

—Yes, here it is.

—看看你的护照好吗?

—行,这就是。

I could come earlier, if necessary. 如果必要我可以早点来。

这时could和can没有时间上的差别。

4. 在虚拟条件句中构成谓语。如:

I would certainly do it for you if I could. 要是我能做得到,我一定会为你们做这事儿。

How I wish I could go with you! 我多么希望和你们一道去!

三、can, could 和be able to的区别与联系。

情态动词can的用法及一般疑问句whatquestions

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英语中情态动词can和could的用法及例句I.情态动词can可以用来: 1.表示“能够”: Two eyes can see more than one. 两只眼睛比一只眼睛看得清楚。(谚) Can you say this in English? 你能用英文表达这个意思吗? I’m sorry I can’t help you. 戏不起我没有能力帮助你。 2.表示“可能”,“可以”: You can sit here. 你可以坐这里。 We can come over to fetch you. 我们可以过来接你。 Can I come in?

我可以进来吗? 3.(用在疑问及否定句中)表示惊异不可能等(后面有时可跟完成及进行形式): She can’t be serious. 她不可能是当真的。 How call you be so silly? 你怎么这样傻? Where can he have gone? 他能到哪里去了呢? What can she be doing now? 她现在能在干什么呢? II.情态动词could可以用来表示: 1)能够: Nobody conld answer that question.

没人能回答那个问题。 It was so dark,we couldn’t see anything. 天那样黑我们什么也看不见。 2)可能,可以: He said he couldn’t come. 他说他不能来。 I said we could go by boat. 我说我们可以坐船去。 2.可以用来代替can,比较委婉地提出请求用法等(a)或是表示惊异不相信等(b): a.Could you do me a favor? 你能帮我一个忙吗? We could send the parcel by air mail. 这包裹可以航空寄去。

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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。你为什么不向我提出? ②用来委婉地责备某人过去应该做某事而没有去做,常译为“本来应该”。如: You could have helped him. 你本来应该帮助他的。 ③表示“差点儿就要”。如: I could have died laughing. 我差点儿笑死了。 2. may / might用于表推测的用法 表示推测,两者都可用,只是might 比may 语气更不确定,表示的可能性更小。 (1) 在句型使用方面:两者均可用于肯定句和否定句,但用于疑问句时,may通常不用于句首,但可用于疑问句的句中(如特殊疑问句等),而might尽管可以用于疑问句的句首,但不算普通,通常会改用其他句式(如用could等)。如: He may [might] know the answer. 他可能知道答案。

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c a n与c o u l d的用法详解及情态动词有关习题 Company Document number:WTUT-WT88Y-W8BBGB-BWYTT-19998

can与could的用法详解 一、表示能力 (1)表示现在的能力,用can: My sister can drive. 我妹妹会开车。 Everyone here can speak English. 这儿人人会说英语。 (2)表示将来的能力,通常不用can或could,而用be able to的将来时态: I’ll be able to speak French in another few months. 再过几个月我就会讲法语了。 One day people will be able to go to the moon on holiday. 总有一天人们可以到月球上去度假。 但是,若表示现在决定将来是否有能力做某事,则可用 can: Can you come to the party tomorrow 你明天能来参加我们的聚会吗 (3)表示过去的能力,有时可用could,有时不能用could,具体应注意以下几点: ①若表示过去一般的能力(即想做某事就随时可做某事的能力),可用could: Could you speak English then 那时候你会说英语吗 ②若表示过去的特定能力(即在过去特定场合做某事的能力),则不能用could,而用w as (were) able to do sth,或用 managed to do sth,或用 succeeded in doing sth 等。 He studied hard and was able to pass the exam. 他学习很努力,所以考试能及格。 At last he succeeded in solving the problem. 他终于把那个问题解决了。 【注】could 不用来表示过去特定能力通常只限于肯定句,否定句或疑问句中,它则可以表示过去特定的能力: I managed to find the street, but I couldn’t find her house. 我想法找到了那条街,但没找到她的房子。(前句为肯定句用managed to,不用could,后句为否定句,可用could)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。 还有在中,could也可表示: He said he could see me next week. 他说他下周能见我。 二、表示许可 (1)对于现在或将来的“许可”,要区分以下两种情况: ①表示(即请求别人允许自己做某事),两者均可用,但用could 语气更委婉: Can [Could] I come in 我可以进来吗

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情态动词can 的用法: 一.定义: 情态动词是一种本身有一定的词义,他不能独立做句子的谓语,一般要和动词原形一起使用,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。 注意:情态动词无人称和数的变化,情态动词后面跟的动词需用原形。 二.具体用法: 1. “能,会”(表示能力、功能),即有某种能力。 Eg, I can play volleyball. 我会打排球。 He can speak English. 我会说英语。 I can be good with children. 我会和孩子们相处得好。 2. “可以”(表示允许、许可、请求),常在口语中。 Eg,Can I have a hamburger? 可以吃一个汉堡吗? Alice can watch TV on the weekend. 在周末Alice可以看电视。 3.表示提出邀请,或者是表示说话时的礼貌,客气,委婉。 Eg,Can I help you? / What can I do for you? 我能为你效劳吗? Can you come to my birthday party? 你能来我的生日聚会吗? (这样的句子在回答时肯定通常用:Y es/ Sure/ nice /great/…等回答。否定时通常用:No/ sorry, I can’t/ No, thanks…等回答。) 4.另外还可以表示推测,某种可能性,意为“可能”,常用于否定句和疑问句中,此时can’t 译为“不可能”。 5. can 的过去式是could, could 用在过去时态中。 三.Can的句型结构: 1.含有情态动词can的肯定句:can 后用动词原形do / be… “主语+ 情态动词+动词原形+其他” Eg,(1)I can play sports. 我会体育运动。 (2)She can speak Chinese. 她会说汉语。 (3)They can have lunch at school. 他们可以再学校吃午饭。 2. 含有情态动词can的否定句:在情态动词can后面加"not"。否定式为can not= can’t “主语+ 情态动词+not +动词原形+其他” Eg,(1)I can not play sports. 我不会体育运动。 (2)She can’t speak Chinese. 她不会说汉语。 (3)They can’t have lunch at school. 他们不可以在学校吃午饭。 3. 含有情态动词can的一般疑问句:把can 提到句首,句首大写C,句末问号别忘记。一般情况下,用can提问,用can回答。肯定回答用Y es,…否定回答用No,…

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情态动词(Modal [‘modl:] verbs) 不能独立作谓语,只能和行为动词一起构成谓语。情态动词用在行为动词前,表示说话人对这一动作或状态的看法或主观设想。 情态动词主要有下列:can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not. 情态动词的特点: 情态动词无人称和数的变化,情态动词后面跟的动词须用原形,否定式构成是在情态动词后面加"not"。 个别情态动词有现在式和过去式两种形式,过去式用来表达更加客气,委婉的语气,时态性不强,可用于过去,现在或将来。 情态动词属非及物动词,故没有被动语态。

一般疑问句General ['d?enr?l] Questions 1.基本结构: ①谓语动词是助动词(do, have和be)、情态动词时,只要直接把这些词置于句首,句末改成问号。★be + 主语+ 其它部分 ★情态动词+ 主语+ 动词原形+ 其它部分 ★肯定回答用“Yes,主语+be\情态动词.”,否定回答用“No,主语+be\情态动词+not.”。

②谓语动词是行为动词时,必须在句首加上助动词Do、Does、Did,句子中谓语动词必须用原形。 ★助动词+ 主语+ 动词原形+ 其它 Do your parents like English Yes,they do. / No,they don’t ③注意:在把肯定句改成否定句或一般疑问句的时候, already要改成yet,some、something、somebody等分别改成any、anything、anybody等。在改成否定句的时候注意把too改成either, both改成neither, all改成none等.把第一人称I、we改成第二人称you。 Are you from Japan﹖Yes, I am./ No, I'm not. Is her sister doing her homework now﹖Yes, she is./ No, she isn't. Does he work in a bank﹖Yes, he does./ No, he doesn't. 2.将陈述句变为一般疑问句 ①含be动词或情态动词的句子(秘诀:一调二改三问号) 一调:即把句中的be或情态动词调到主语前; 二改:改换主语称谓,即将句中的主语I\my \mines\we\our\ours等第一人称分别改为相应的第二人称you\your\ yours等; 三问号:句末的句号改为问号。如: I am an English teacher. →Are you an English teacher We can speak English fluently. →Can you speak English fluently ②含行为动词(或称为实义动词)的句子(秘诀:一加二改三问号) 一加:即在句首加助动词Do或Does; 二改:①把谓语动词改为原形;②、改换主语称谓(同第一组); 三问号:句末的句号改为问号。 We read English every morning. → Do you read English every morning Tom’s father listens to English on the radio every evening. → Does Tom’s father listen to English on the radio every evening 特殊疑问句The special interrogative sentence 以疑问词开头,对句中某一成分提问的句子叫特殊疑问句。 疑问代词:what(什么)who(谁,作主语) which(哪个,在一定范围内选择) whose(谁的,指附属关系)whom(谁,作宾语) ②疑问副词:when(何时,询问时间)where(何地,询问地点) why(为什么,询问原因) how(如何,询问手段,方式,工具以及程度) 2.语序:

情态动词can的基本用法

情态动词can的基本用法: 情态动词can有一定的词义,但不能独立存在,它必须与动词原形一起构成谓语。情态动词can没有人称和数的变化。其具体用法如下: 1. 表示"能、会",指脑力或体力方面的"能力"。例如: I can speak En glish. 我会讲英语。 Jim can swim but I can't. 吉姆会游泳,但我不会。 2. 表示"可能",常用于否定句或疑问句中,指某种可能性,此时can 't译为“不可能”。例如: Han Mei ca n't be in the classroom. 韩梅不可能在教室里。 Can he come here today, please? 请问他今天能到这里来吗? 3. 表示"可以",常用于口语中,指许可或请求做某事,可以代替 may。例如: Can I have a cup of tea, please? 请问我可以喝一杯茶吗? You can go out. 你可以出去了。 补充:can的过去式could,意为“能、会”,表示过去的能力 女口: He could write poems when he was 10. 他十岁时就会写诗。 could在疑问句中,表示委婉的语气,此时could没有过去式的意思。 如:Could you do me a favour? 你能帮我个忙吗?一 Could I use your pen?我能用一下你的钢笔吗?一Yes, you can.可以。(注意回答) 情态动词can的基本句型:

1. 肯定句型为:主语+can+动词原形+其它。例如: They can play basketball. 他们能打篮球。 She can dance.她会跳舞。 You can go to watch TV. 你可以去看电视了。 2. ........................... 否定句型为:主语+can not(can't/cannot)+ 动词原形+其它。表示"某人不能(不会。不可能)做其中can't是can not的缩略式,英国多写成cannot。例如: You cann ot pass the ball like this. 你不能像这样传球。 I ca n't ride a motorbike. 我不会骑摩托车。 3. 疑问句句型分为:一般疑问句句型和特殊疑问句句型两种类型。 ⑴一般疑问句句型为:Can+主语+动词原形+其它。表示"某人会(能。可以)做吗?",用于口语时,常表示请求或许可。其肯定答语用""Yes,主语+can."作答; 否定答语用"No,主语+can't."作答。注意答语中做主语的人称代词,应根据问句中的主语作相应的变化。其变化规则为:第一人称问,则第二人称答;第二人称问,则第一人称答;第三人称问,第三人称答。例如: ①-Can you sing an En glish song for us? 你可以为我们大家唱一首英语歌吗?

初中英语语法教学微课教案(情态动词can和could)

初中英语语法教学微课教案(情态动词can和could) 教学思路: 本节课我教的是情态动词can和could作“能力”解时的区别。这节课我打算通过复习以前学过的情态动词can的用法,以及通过做游戏,让学生在轻松愉快的氛围中掌握can的用法,以及了解can和could 的区别。 一、Teaching Content: Topic:Unit5Can you play the guitar? Grammar:Using “can”/ “could” to talk about ability 二、Teaching Aims: https://www.wendangku.net/doc/a34388619.html,e can talk about the ability at present. https://www.wendangku.net/doc/a34388619.html,e could talk about ability in the past. 三、Teaching Key and Difficult Points: How to use “can” and “could” to express ability in the present and past. 四、Teaching Methods: Task-Based Language Teaching Method 五、Teaching Procedures: Step 1:Warming up Task 1: Revision T: What can you do now? S1: I can sing. S2: I can draw S3: I can dance. T: Can you ride a bike / swim / fly a kite / play football / play chess? Ss:Yes , I can. / No, I can’t. Task 2: Playing a game

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情态动词can和could用法详解

情态动词can 和could 用法详解 can 和could 用法详解 1. 表示能力,could 是can 的过去。如: Can you speak English? 你会说英语吗? Could you speak English then? 那时候你会说英语吗? 2. 表示许可,注意以下用法: (1)对于现在或将来的“许可” ,要区分以下两种情况: a. 表示请求允许(即请求别人允许自己做某事),可用can(=may)或could(=might)(注意:这 里的could 并不表示过去,而是表示现在,只是语气较委婉)。如: Can [May, Could, Might] I come in? 我可以进来吗? b. 表示给予允许(即自己允许别人做某事),一般只用can(=may), 而不能用could或might。如: A: Could [Can] I use your pen? 我可以借用你的钢笔吗? B: Yes, of course you can. 当然可以。(注意: 此处不用Yes, you could) (2)对于过去的“许可” ,也要区分以下两种情况: a. 表示过去一般性允许(即表示某人随时都可以做某事),用can的过去式(即could)。如:When I lived at home, I could watch TV whenever I wanted to. 我住在家里时,想什么时候看电影就可以什么时候看(一般性允许)。 b. 表示过去特定的允许(即表示在过去某一特定情况下允许进行某一活动),则不用could, 而需换成其它表达(如:had permission 或was [were] allowed to)。如: I was allowed to see the film yesterday evening. 昨天晚上允许我去看了电影(特定的允许,所以不能用could)。 3. 表示推测: (1)对现在或将来的推测,can 通常只用于否定句或疑问句中,一般不用于肯定句: It can't be true. 那不可能是真的。 What can they be doing? 他们会在干什么呢? Can it be Jim? 那会是吉姆吗? 但could(可以表示现在)则可用于肯定句中: We could [may, might] go to Guilin this summer. 今年夏天我们可能要去桂林。(将来可能性)You could [may, might] be right, but I don 't think you are. 你可能是对的,但我并不认为你是

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人教版英语八年级上英语情态动词复习总结含解析百度文库 一、初中英语情态动词 1.—He be in the classroom,I think. —No, he be in the classroom. I saw him go home a minute ago. A. can; may not B. must; may not C. may; mustn't D. may; can't 【答案】 D 【解析】【分析】句意:——我认为他可能在教室里。——不,他肯定没有在教室里,我刚才看到他回家了。must,can(could),may(might)可以表示猜测,must表示肯定猜测,用于肯定句,肯定……一定……;can't表示否定猜测,肯定不……,另外can(could),may (might),表示可能性猜测,可能……根据I think,可知把握较小,根据I saw him go home a minute ago.可知第二句把握大,故选D。 2.—Where is Monica? I can't find her anywhere. —She be in the library. She loves reading books when she is free. A. must B. need C. can't 【答案】 A 【解析】【分析】句意:——莫妮卡在哪?我到处都找不到她。——她肯定在图书馆,她喜欢空闲时看书。A肯定,肯定句中表示推测,B需要,C不可能,否定句中表示推测,根据 She loves reading books when she is free ,可知是肯定句表示推测,故选A。 【点评】考查情态动词,注意情态动词表推测的用法。 3.—That must be Mr. John. —No, it be him. I saw him off at the airport half an hour ago. A. may not B. mustn't C. can't D. needn't 【答案】 C 【解析】【分析】句意:——那一定是约翰先生。——不,不可能是他。我看见他在半小时前到达机场。nay not可能不是;mustn't一定不是;can't不可能是;needn't不必,英语中,肯定的推测用must;否定的推测用can't。依据 I saw him off at the airport half an hour ago. 可知不可能是他,所以应该是否定的推测,故选C。 【点评】此题考查情态动词。弄清每个情态动词的使用规则。根据语境和上下文的联系确定所使用的情态动词。 4.—I missed last night's Everlasting Classics(《经典咏流传》)! —You care. You can watch it online later. A. mustn't B. can't C. may not D. needn't

情态动词的特殊用法

情态动词的特殊用法 1. _____ fired, your health care and other benefits will not be immediately cut off. A. Would you be B. Should you be C. Could you be D. Might you be 2. —What’s the name? —Khulaifi. _____ I spell that for you? A. Shall B. Would C. Can D. Might 3. John, look at the time. _____ you play the piano at such a late hour? A. Must B. Can C. May D. Need 4. —Must I turn off the gas after cooking? —Of course. You can never be _____ careful with that. A. enough B. too C. so D. very 5. Some aspects of a pilot’s job _____ be boring, and pilots often _____ work at inconvenient hours. A. can;have to B. may;can C. have to;may D. ought to;must 6. —When can I come for the photos? I need them tomorrow afternoon. —They _____ be ready by 12:00. A. can B. should C. might D. need 7. When he was there, he ___ go to that coffee shop at the corner after work every day.A. would B. should C. had better D. might 8. —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 B. might not C. needn’t D. shouldn’t 9. You can’t imagine that a well-behaved gentleman _____ be so rude to a lady. A. might B. need C. should D. would 10. Many people agree that _____ knowledge of English is a must in _____ international trade today. A. a;不填 B. the;an C. the;the D.不填;the 11. How _____ you say that you really understand the whole story if you have covered only part of the article? A. can B. must C. need D. may 12. The fire spread through the hotel quickly but everyone _____ get out. A. had to B. would C. was able to D. could 13. There’s no light on — they ____ be at home. A. can’t B. mustn’t C. needn’t D. shouldn’t 14. Tom, you _____ leave all your clothes on the floor like this! A. wouldn’t B. mustn’t C. needn’t D. may not 15. _____ we never forget each other. A. May B. Can C. Must D. Should 练习: 1. Mr. Bush is on time for everything. How ____ it be that he was late for opening ceremony?A. can B. should C. may D. must 2. Naturally, after I told her what to do, my daughter _____ go and do the opposite! A. may B. can C. must D. should 3. It has been announced that candidates _______ remain in their seats until all the papers have been collected. A. can B. will C. may D. shall 4. “The interest ___________ be divided into five parts, according to the agreement made by both sides,” declared the judge. A. may B. should C. must D. shall 5. You can’t imagine that a top student ______ have failed in the college entrance examination. A. might B. need C. should D. would 6. Football, as is known to the world, _______ be exciting and inviting. A. should B. might C. can D. will 7. —_____ he open the door? —Yes, please. A. Shall B. Will C. Can D. Would 8. The World Wide Web is sometimes jokingly called the World Wide Wait because it _____ be very slow. A. should B. must C. will D. can 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. It’s nearly seven o’clock. Jack _____ be here at any moment. A. must B. need C. should D. can 11. What should we do if it _____ tomorrow? A. should snow B. would snow C. snow D. will snow 12. You _____ use my bike on condition that you give it to me before I leave here. A. should B. must C. ought to D. shall 常见的通常只能用主动语态的场合 1. 当谓语动词是不及物动词,又不能构成动词短语接宾语时。 2. 当宾语是反身代词时。如I hurt myself. 3. 当宾语是相互代词时。如We should learn from each other. 4. 当宾语是不定式、动名词时。如I want to watch TV. / They enjoy playing basketball. 5. 当谓语动词是拥有、容纳类动词(have, hold)时。如I have a big family. / The room can hold 40 people. 6. 当谓语动词是开始、结束类动词(start, begin, stop, end, finish)时。如The first class will start at 8:00. / The film ended when I got there. 7. 当谓语动词是开张、关门类动词(open, close)时。如The shop usually opens before 8:30. 8. 当谓语动词是花费类动词(take, cost)时。如The new dress cost her 90 dollars. 9. 当谓语动词是发生类动词(happen, take place)时。如Something strange happened an hour ago. 10. 当谓语动词是保持类动词(keep)时。如The hall keeps quiet now. 11. 当谓语动词是运动、变化类动词(leave, move, change)时。如The train is leaving. / Things have changed a lot. / The car didn’t move. 12. 当谓语动词是变得、成为类动词(become, get, turn)时。如The teacher became angry. / The weather is getting warmer and warmer. 13. 当谓语动词是…起来类动词时。具体细分如下: ○1半系动词(look, sound, feel, smell, taste)。如The building looks very tall. / That piece of music sounds nice. / The dish smells delicious. ○2其它类动词(eat, drink, cook, drive, work, read, write, sell, show, play, clean, wear, wash, burn等)。如This kind of fruit eats crisp (脆). / Orange drinks sweet. / The car drives smoothly. / This text reads easily. / The pen writes well. / The clothes wash hard. 14. 当宾语前有与主语一致的物主代词,且宾语名词为身体的一部分时。如He cut his finger. 15. 当谓语动词是由have / take构成的词组(have a cold, have/take a rest, have/take a walk)时。如I had a cold yesterday. 16. 当谓语动词是need, 且主语是物,后接动名词时。如My bike needs repairing. 17. 当不定式作定语时。如I have a lot of housework to do. / He wants a house to live in. 18. 当不定式作表语形容词的状语时。这里所说的表语形容词即作表语的形容词;所说的状语即修饰该形容词的程度状语。

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