搜档网
当前位置:搜档网 › 高中情态动词总结

高中情态动词总结

高中情态动词总结
高中情态动词总结

语法:情态动词

一、can, may, must

根据意思与习惯用法,我们可以把can, may, must 分成以下两组用法,方便学习与掌握。1.第一组用法见下表(主要在初中的时候我们所掌握的):

词义肯定否定疑问过去式

can 能、会can can’t Can...? could

may 可以may mustn’t/may not May...? might

must 必须must needn’t Must...? must/ha ve to

A) can

a) can 的肯定、否定、疑问及过去式的例句:

eg. Computers can do a lot of things for us.

Money cannot buy everything.

Can you speak French?

I could run very fast when I was young.

b) can 与be able to

can 与be able to 的意思相近,经常可以互换使用。

但在用过去式的时候,could 与was able to 的意思不同。

试比较:

Einstein was able to flee Germany when Hitler came into power.(侧重经过努力而成功做到谋事)

I could pass the examination, but I was too careless.(表示能力)

c) could 在疑问句时用意表示请求,意义同can,是一种比较客气的表达方式。

B) may

a) may 的肯定、否定、疑问及过去式的例句:

eg. You may choose anyone here you like.

—May I leave now? —Yes, of course/Sure. Go ahead.

—No, you mustn’t. (注:口语中也能用cannot。)

I was told that the boss might come to the office before 9.

b)mustn’t 与may not

You mustn’t leave the bike here.(禁止)

The sign on the wall reads, ―Visitors may not feed the animals in the zoo.‖

c) may 可放在句首,表示“祝愿”。May you succeed!

d) might 有时用在疑问句中,只是一种比may 更客气一点,而非过去式。

C) must

a) must 的肯定、否定、疑问及过去式的例句:

eg. Everyone must obey the rules.

—Must I finish the work today? —Yes, you must.

—No, you needn’t/don’t have to.

He told me he must/had to see a doctor tomorrow morning.

b) must 与have to

2.第二组用法见下表:(表示推测)

词义肯定否定疑问过去式进行式

can 可能/一定/ cannot Can...? can’t have done can’t be doing

may 可能may may not / may have done may be doing

must 一定must / / must have done must be doing

a) can, may, must 的第二种用法,是用来表示说话人的一种推测。

现在时举例:

—Can Tom be in the classroom?

—Yes, he must be there.

或—Yes, he may be there, but I’m not quite sure.

或—No, he can’t be there, because he hasn’t come to school today.

过去时举例:(表示对过去的推测用情态动词+完成式)

I must have been asleep. I didn’t hear your footsteps.

David became angry at the meeting. He may have misunderstood what I meant.

James can’t have forgotten the examination yesterday. There must have been something wrong with him, I believe.

b)表示可能性的否定句中有时也可用may,但意思与cannot 有所不同。

eg. – Can he know the secret? – I am not sure. He may not know it yet.

或:– No, he cannot know it.

c) 用might 和could 表示可能性

eg. —Could it be Susan at the door? —Yes, it might be her.(现在口语中也可用could be 回答)*d) could have done 也可以用在肯定句里。

eg. It was dangerous to do so. You could have killed yourself!

二、shall, will, would

1.用在一般疑问句中,表示征求对方的意见。

2.shall 与第二、第三人称连用,用在肯定、否定句中,表示“命令”、“允诺”、“警告”、“威胁”,及说话人的意愿和决心。

If you dare to do that, you shall be punished.

These rules shall be obeyed.

3.will 在陈述句中可用于任何人称,表示“意愿、意志、决心”等。有时也可用在条件句中。

4.will 和would 可以表示习惯性反复发生的动作,或在某一条件下,一定会发生的动作。这时,

will 一般指“现在”,would 一般指“过去”。

三、should/ought to

1.可以表示一种必要性、义务,解为“应当、应该”。可以与任何人称连用,并用在肯定、否

定、疑问句中。但疑问句时用should 更多一些。

2.可以表示一种推测,解为“应该是”。用于任何人称的肯定、否定、疑问句。它还有进行和完成两种形式:should/ought to be doing(对现在正在进行的动作的推测)和should/ought to have done(表示与过去的事实相反,“本来应该”的意思)。

3.should 有时可以表示说话人惊讶的感觉,解为“竟然”。

You can’t imagine that well-behaved gentleman should be so rude to a lady.

四、need 和dare

need 和dare 两词,都既可作为情态动词,又可作为实意动词,所以复习的重点是分清在句子中它们分别是哪种动词。

1.need 解为“需要、必须”。

A) 作为情态动词时,多用于疑问句和否定句。

B) 作为实意动词,可用于各种句型,是及物动词,可以跟名词做宾语。

C) needn’t have done (本来不必做)

You needn’t have mentioned it to him, because he had been told everything before.

你本来不必跟他提这件事的,之前已经有人把一切都讲给他听了。

2.dare 解为“敢”。

A) 作为情态动词时,多用于疑问句和否定句。

但是dare 的固定词组“I dare say...”,用在肯定句中。

注意:dare 作为情态动词时,它的过去式是dared。

B)作为实意动词,dare 可以用在各种句型里。

但是注意在否定句里,有时后面的不定式的to 可以省略。

推测肯定性可能性由强到弱

must / ought to / should / /may / might /can 理论上的可能/ must 用于表示"必定","必会":All mankind must die.(表示必然会发生的事)

ought to / should用于表示"想必会"(语气较must 弱):

They should / ought to be there by now.

may 和might 用于表示"事实上的可能性"或"预测":

It may snow later this afternoon. (表示预测)

You might be right. (表示有可能)

can理论上的可能

Anybody can make mistakes. (只表示理论上的可能性)

情态动词的用法:表示“意图”、“打算”“意愿”“决心‖

(will, would* shall, should*)

二.情态动词+ have+过去分词的用法

对过去或完成的猜测must / may /might / could / can’t / couldn’t have done

虚拟语气could have done 本来可以;有可能

needn’t have done 本没必要做某事

should / ought to have done 本应该做某事

shouldn’t / oughtn’t to have done本不应该做某事

练习

1. 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

2. You don’t ____ to go there if you have no time.

A. need

B. want

C. must

D. ought

3. ―May I stop here?‖ ―No, you ____.‖

A. mustn’t

B. might not

C. needn’t

D. won’t

4. I didn’t see her in the meeting room this morning. She ____ have spoken at the meeting.

A. mustn’t

B. shouldn’t

C. needn’t

D. couldn’t

5. It was so cold outside that the child ____.

A. didn’t dare to go out play

B. dared not to go out to play

C. dare not go out to play

D. dared not go out to play

6. You ____ out without an overcoat. No wonder you caught cold.

A. shouldn’t have gone

B. mustn’t have gone

C. couldn’t have gone

D. oughtn’t to go

7. Tomorrow is your birthday. I promise you that you ____ have a most beautiful present.

A. might

B. will

C. could

D. shall

8. ―Phone me when you get home.‖ ―____.‖

A. I must

B. I should

C. I will C. I can

9. The boss ____ the worker how to do it properly, or the accident couldn’t have happened.

A. can’t have told

B. ought to tell

C. couldn’t tell

D. mustn’t have told

10. ―Has Maria come yet?‖ ―No. She ____ an hour ago, in fact.‖

A. should come

B. must have come

C. ought to have come

D. would come

11. ―You know that you were driving at 100 km an hour, don’t you?‖

―No, officer, it ____. This car can’t do more than 80.‖

A. may not have been

B. couldn’t have been

C. mustn’t have been

D. shouldn’t have been

12. If you don’t like to climb the hill with us this afternoon, you ____ as well stay in the hotel, watching TV.

A. should

B. may

C. can

D. would

13. The careless man received a ticket for speeding. He ____ have driven so fast.

A. can’t

B. wouldn’t

C. mustn’t

D. shouldn’t

14. I’ll call for the police if he ____ again.

A. dares gamble

B. dared gamble

C. dare to gamble

D. dares to gamble

15. You ____ again, but since you are here, I will let you have another try.

A. needn’t come

B. don’t need to come

C. needn’t have come

D. didn’t need to come

高考体验:

1.You can’t imagine that a well-behaved gentleman ____ be so rude to a lady.

A. might

B. need

C. should

D. would

2.Mr. Bush is on time for everything. How ____ it be that he was late for the opening ceremony?

A. can

B. should

C. may

D. must

3.Oh, I’m not feeling well in the stomach. I ____ so much fried chicken just now.

A. shouldn’t eat

B. mustn’t have eaten

C. shouldn’t have eaten

D. mustn’t eat

4.Children under 12 years of age in that country ____ be under adult supervision when in a public library.

A. must

B. may

C. can

D. need

5.According to the local regulations, anyone who intends to get a dri ver’s licence ____ take an eye test.

A. can

B. must

C. would

D. may

6.Black holes ____ not be seen directly, so determining the number of them is a tough task.

A. can

B. should

C. must

D. need

7.You know he is not going to let us leave early if we ____ get the work done.

A. can’t

B. may not

C. shouldn’t

D. mustn’t

8.The boss has given everyone a special holiday, so we ____ go to work tomorrow.

A. can’t

B. mustn’t

C. needn’t

D. shouldn’t

9.When I was young, I was told that I ____ play with matches.

A. wouldn’t

B. needn’t

C. mustn’t

D. daren’t

10.According to the air traffic rules, you ____ switch off your mobile phone before boarding.

A. may

B. can

C. would

D. should

情态动词知识点总结

情态动词知识点总结 一、初中英语情态动词 1.Rock music ______ sound popular with the young, but it's not the favor of the aged people. A. must B. need C. should D. may 【答案】 D 【解析】【分析】句意:摇滚音乐在年轻人中听起来受欢迎,但是它不受上了年龄的人的 赞同。must, 表示猜测时,指把握比较大的肯定猜测,肯定……;need需要;should,应该;may,表示把握比较小的肯定猜测,可能,也许。结合句意,故选D。 【点评】考查情态动词辨析,注意几个常见情态动词的意思和用法。 2.——Shall we meet at the station at 7 am? ——In fact, we _______. The train _______ until 9 a. m. A. mustn't; doesn't leave B. mustn't; leaves C. needn't; won't leave D. needn't; will leave 【答案】 C 【解析】【分析】need,需要,否定式是needn't;must的含义是必须一定,其否定形式mustn't表示禁止的含义。句意:我们上午七点在车站见面好吗?——实际上,我们不必。 火车到上午九点钟才出发。结合语境可知后一空描述的是将要发生的动作,故用一般将来 时态。选C。 【点评】情态动词的考查是初中英语考查的重点,平时学习中一定要熟记这些词的基本词 义及用法上的不同,注意其用法及在句子中表达语气的不同。考试中结合语境选择合适答案。 3.We __________ pay to get into the concert. It's free. A. can't B. mustn't C. might not D. don't have to 【答案】 D 【解析】【分析】句意:我们进入音乐会不必付钱。这是免费的。A.can"t 不可能; B. mustn"t 禁止; C.might not 可能不;D. don"t have to不必。根据It's free.可知音乐会是免费的,因此不必付钱。故选D。 4.—Where is George? —He _______ be here just now. His coffee is still warm. A. need B. can't C. must D. shouldn't 【答案】 C 【解析】【分析】句意:——乔治在哪里?——他刚才一定在这里,他的咖啡还是热的。A.

语法知识—情态动词的知识点总复习附解析

一、选择题 1.It is 11:00 p.m now. Peter hasn't come back yet. His mother ______ be very mad at him. A.may B.can C.must D.need 2.—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true. A.must not B.may not C.needn’t D.will not 3.-Listen! A wolf is crying! -It _______ be a wolf, because a wolf never comes out at this time. A.mustn’t B.needn’t C.can’t D.don’t 4.I’ve bought a nice necklace for Jo’s birthday. She _____like it, but I’m not sure. A.can B.may be C.might D.must 5.---Mum, must I finish my homework today? ---No, you . Tomorrow is Sunday and you may have a rest today. A.shouldn’t B.mustn’t C.can’t D.don’t have to 6.You look quite tired. You'd better ________ a good rest. A.stop to have B.stop having C.to stop to have D.to stop having 7.—Tom, we’re going shopping at eight, right? —Yeah, but I ______ be a little late, so don’t wait for me. A.may B.should C.mustn’t 8.You should________ the teacher________being late for school. A.apology to, about B.apologize to, for C.apologies to, for D.apologize to, on 9.—Can you come to my party on Saturday afternoon? —Sorry, I can’t. I ________ meet my friends. A.can’t B.might have to C.needn’t 10.— I wonder if these are Jim's glasses. —They _____his. He doesn't wear glasses. A.might be B.could be C.can't be 11.—The book report is very important. You ________ write it carefully. —But I ________ hand it in now. A.must; must B.have to; must C.must; have to D.have to; have to 12.Even the top student can't work out this problem, so it________ be too difficult. A.must B.may C.can D.need 13.—________ I borrow the books from the library, Miss Yang? —Sorry, you________. These books are only for members of the English Club. A.Can; couldn’t B.Could; can’t C.Could; could n’t D.Can; needn’t

情态动词表推测用法总结(整理稿)

情态动词表推测用法总结 (一)情态动词表推测 能用于表推测的情态动词: 英语情态动词表推测的时态构成 (1)语气部分:(以下情态动词语气由强至弱) 肯定句:must、may、might(=could) 否定句:can’t(=couldn’t)、mayn’t、mightn’t 疑问句:can、could(语气更加委婉不确定) (2)时态部分: 一般现在或一般将来时间的推测:情态动词+be;情态动词+v. 对过去时间的推测:情态动词+have done 对正在进行的时态的推测:情态动词+be doing (二)表许可、请求 1、 can, could 2、may, might 3、must 4、shall 5、will, would 1. can, could 1) 用在疑问句中,表示一般的请求。两者不同在于:用could 要比用can更加委婉,特别是没有把握得到允许时。 Can I go with you? 我能和你一起去吗?Could I ask you something? 我能问你一个问题吗? 2) 用在陈述句中,表示许可:You can leave when you finish your work. 做完事情后你才可以走。 2. may, might 1) may用在疑问句中,也表示一般的请求。同can相比,may比较正式,常常表示尊敬之意。并且,may在疑问句中常用于第一人称,很少有May you…/they…这样的句型。Might比较少用在疑问句中,它表示请求的时候常用陈述句。 May I make a suggestion? 我可以提个建议? 2) 用在陈述句中,表示许可,此时与can, could相近。 You may have a rest before we set out again. 我们再次出发之前你可以先休息一下。 3. must 1) 表示说话人“不许”和“禁止”某人做某事,有很强的劝告语气。 Cars must not be parked here.此地不准停车。 2) Must的一般疑问句的回答有两种,表示肯定,用Yes, you must. 表示否定,用No, you needn’t. Must I post this letter tomorrow? 我明天必须得寄掉这封信吗? Yes, you must. 是的,你必须明天寄掉。

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。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。

最新英语语法情态动词归纳总结

最新英语语法情态动词归纳总结 一、单项选择情态动词 1.Mr. Smith is almost on time for everything. How ________ it be that he was late for the meeting? A.can B.should C.may D.must 【答案】A 【解析】 【详解】 考查情态动词辨析。句意:史密斯先生几乎任何事情都是准时的。他怎么可能开会迟到了? A. can可能,可能性,表示可能性时,常用于否定句和疑问句中,且有时还带有“惊奇、不相信” 等感情色彩。B. should 应该; C. may也许,表示可能性时常用于肯定句中,不用于疑问句中。D.must常用于肯定句中表推测,“一定……”的意思;本题是强调句型的一个变式:强调其特殊疑问句how的形式。根据前句“斯密斯先生几乎是很准时”可推测出“怎么可能开会迟到呢?”。根据句意可知,用于疑问句中的“可能性”且有不相信的色彩,四个选项只有“can”符合题意。故选A 【点睛】 情态动词就是表示说话者对事情的一种看法,也就是一种语气。情态动词的用法一直是命题者常设置的考点和重点,平时要加强记忆。 2.--- Oh, my God! I just missed the last bus back home. --- That’s really bad. I’m sure you ______ it, but you just didn’t hurry up. A.had caught B.could have caught C.could catch D.can catch 【答案】B 【解析】 【详解】 考查情态动词+have done结构。句意:——哦,我的上帝!我刚好错过了回家的末班车。——这是非常糟糕的。我肯定你能赶上,但你就是不抓紧。could have done“本来能做而没有做”。故选B。 3.-- Did Jim come? -- I don’t know. He _______ while I was out. A.might have come B.might come C.must have come D.should have come 【答案】A 【解析】 【详解】 考查情态动词推测用法。句意:Jim来了吗?--我不知道,在我不在的时候,可能来过。根据前文I don’t kn ow.可知,说话者不知道Jim来没来,因此后文推测来过,但是语气很不确定,故可知选A。对过去情况的推测为情态动词+have done,must have done 一定做了某

(完整版)必修三unit2语法讲解情态动词用法

必修三unit2语法讲解情态动词用法(二) 、ought to的用法 1. ought to应该”与should相比较ought to语气重,偏重责任、义务、 道德、法律”等方面,意为应该” ①We ought to stop polluti ng n ature.我们应该停止污染大自然。 2. ought to表示较大的可能性。 ①Mary ought to be here soon.玛丽应该很快就来了。 [点津]用ought to表示推断时,语气较肯定,通常指的是一种合乎逻辑的 可能性(与should表推断时相似),有时可译为很可能;准是”语气比must要弱)。 3. ought to的否定形式为ought not to或ought n't to,其一般疑问句形式是将ought置于主语前。 ①We ought not to start so late.我们不该这么晚动身。 4. 在反意疑问句中,常省掉to用ought n't或should n't。 ① He ought to take back what he has said, ought n' t/should n't he? 他应该收回他说的话,是吗? 1 —1.写出下面句中黑体部分的意义 ① To keep fit, weought to lear n more about our body. _____ ① Youought not to do such a thing. _______ ① Itought to be a close game. _______ 1 —2.用ought完成句子 ①(尔不该责备他。You __________ (scold )him. ①我明天该动身吗?一_______________ (_leave [tomorrow? 是的,你应该。一Yes, you ought to ①我们现在应该走,是吗?We ought to go now, ______________ _? 二、have to, don't have to 与must n't 的用法 1. have to(口语中常用have got to)表示客观需要做的事情,意为必须;不 得不”有时态、人称和数的变化,其否定式和疑问式应由助动词do构成。 ① My brother was very ill, so I had to call the doctor in the middle of the ni ght. 我弟弟病了,我不得不半夜里把医生请来。

英语情态动词用法总结(完整)

英语情态动词用法总结(完整) 一、单项选择情态动词 1.--- Difficulties always go with me! --- Cheer up! If God closes door in front of you, there be a window opened for you. A.must B.would C.could D.can 【答案】A 【解析】 【详解】 考查情态动词辨析。句意:——困难总是伴随着我!——高兴点! 如果上帝在你面前关上了门,一定有一扇窗户为你打开。A. must必须;B. would将要;C. could能,会;D. can能,会。must表示对现在的状态推测时,意为“一定”,表示可能性很大的推测。符合语境。故选A。 【点睛】 1) must用在肯定句中表示较有把握的推测,意为"一定"。 2) must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。 3) must 表示对已发生的事情的推测时,must 要接完成式。 4) must表示对过去某时正发生的事情的推测,must 后面要接完成进行式。 5) 否定推测用can't。 本句中的。must表示对现在的状态推测时,意为一定,表示可能性很大的推测。符合第2点用法。 2.Paul did a great job in the speech contest. He many times last week. A.need have practised B.might practise C.must have practised D.could practise 【答案】C 【解析】 【详解】 考查情态动词。句意:保罗在演讲比赛中表现得很好。他上星期一定练习了很多次。must have done是对过去发生的动作最有把握的猜测,意思是“一定”。故C选项正确。 3.He is a bad-tempered fellow, but he ________ be quite charming when he wishes. A.shall B.should C.can D.must 【答案】C 【解析】 【详解】 考查情态动词辨析。句意:他是个脾气不好的家伙,但当他希望自己有魅力的时候,他可

初中英语情态动词详细用法归纳(含练习及答案)(直接打印版)

初中英语情态动词详细用法归纳(含练习及答案)(直接打印版) 情态动词有具体的词义,但也同助动词一样,需要与其他词语一起构成句子的谓语,另外情态动词没有人称和数的变化,情态动词后必须跟动词原形。 1. can 的用法: (1).表示能力、许可、可能性。表示能力时一般译为―能、会‖,即有种能力,尤其是生来具备的能力,此时may 和must 均不可代替它。如:She can swim fast, but I can’t . 她能游得很快,但我不能。I can see with my eyes. 我用眼睛看。 (2).表示许可,常在口语中。如:You can use my dictionary. 你可以用我的字典。 (3).表示推测,意为―可能‖,常用于否定句和疑问句中,此时can’t 译为― 不可能‖。如:Can the news be true? 这个消息会是真的吗?—Can it be our teacher?那个人有可能是我们老师吗?—No, it can’t be our teacher. He is on a visit to the Great Wall.不可能。咱们老师正在游览长城呢。 【例题】—I think Miss Gao must be in the library. She said she would go there. —No. She __be there, I have just been there. A.can’t B.mustn’t C.needn’t D.wouldn’t 【解析】根据下文―我刚去过那儿‖可知,应为― 不可能‖,can’t 表示推测[答案] A 2. could的用法: (1).can的过去式,意为― 能、会‖,表示过去的能力。如:He could write poems when he was 10. 他十岁时就会写诗。 (2). 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?—Could I use your pen? 我能用一下你的钢笔吗? —Yes, you can.可以。(注意回答) 3. may的用法: (1).表示请求、许可,比can 正式,如:May I borrow your bike? 我可以借你的自行车吗?You may go home now. 现在你可以回家了。 【例题】—_______ I borrow your MP3? —Sure . Here you are. A. May B.Should C.Must D. Would 【解析】在此处表示请求,意为― 做……可以吗‖。答案:A (2) .表示推测,谈论可能性,意为― 可能,或许‖,一般用于肯定句中。如:It may rain tomorrow . 明天可能会下雨。She may be at home. 她可能在家呢. (3) .may的过去式为might ,表示推测时。可能性低于may。如:He is away from school. He might be sick. 他离开学校了,可能是他生病了。 (4) . 表示希望、祈求、祝愿,常可译为“祝愿”。通常是用may +主+V 例如:May you have a good time. 祝你过得愉快。May you be happy! 祝你幸福!May you succeed!祝你成功! 4. must的用法: (1).must 表示主观看法,意为―必须、一定‖。如:You must stay here until I come back.在我回来之前你必须呆在这儿。Must I hand in my homework right now? 我必须现在交作业吗? (2) 其否定形式mustn’t表示― 一定不要‖ ―千万别‖ ―禁止, 不许‖. 如:You mustn’t play with fire. 你不许玩火。You mustn’t be late. 你一定不要迟到。 (3)对must引导的疑问句,肯定回答为must,否定回答为needn’t 或don’t have to .如:—Must I finish my homework?我现在必须完成作业吗?—No, you needn’t.不,你不必。 (4)must表示有把握的推测,用于肯定句。如: The light is on, so he must be at home now.灯亮着,他现在肯定在家。 注意其反意问句的构成形式: 当must表示肯定的判断、推测时,其反意疑问句要用实际问句的助动词来构成。如:She must have seen the film before,hasn’t she?(注意反意疑问句的后半部分)You must have met uncle Wang in the shop yesterday,didn’t you? (注意反意疑问句的后半部分)

情态动词语法讲解

Modal Verbs 情态动词有can (could), may (might), must (must), have to, shall (should), will (would), need (need), dare (dared), ought to 等。情态动词无人称和数的变化。它不能单独使用,必须跟其后的动词原形构成谓语。情态动词的具体用法如下: 一、can, could 1、表示能力。 a. Can you speak English? b. Can you finish this work tonight? c. Man cannot live without air. Note:

(1) can表示能力时,可用be able to 代替。 a. I’ll not be able to come this afternoon. (2) 当我们要表示“某件事情已经 成功”时,应用was/ were able to , 不能用could a. He saw well and he was able to swim to the river when the flood happened. b. He was able to go to the party yesterday evening and he enjoyed himself very much. 2、表示客观可能性

a. People who live near airports can have their hearing harmed. b. The boy can sometimes be very naughty. (表示某人或某物一时的情况,“有时会。。。”) c. The invention can be improve d. d. Even experts can make mistakes. e. He can’t be in Beijing now because I saw him a moment ago. f. He had a lot of work to do last night, so he couldn’t have gone to see a film. Note: 在肯定句中用can表示可能性时,其含义是理论上的可能性,不表示

最新情态动词知识点总结

最新情态动词知识点总结 一、初中英语情态动词 1.—We've got everything ready for the picnic. —Do you mean I __________ bring anything with me? A. can't B. mustn't C. couldn't D. needn't 【答案】 D 【解析】【分析】句意:—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗?A. can't 不能;B. mustn't 表示禁止,一定不要;C. couldn't不能,表示过去时态;D. needn't不必。结合句意,故选D。 【点评】本题考查情态动词的用法。 2.All passengers ______ go through safety check before they take a plane. A. can B. may C. must D. could 【答案】 C 【解析】【分析】句意:所有乘客登机前必须接受安全检查。A. can能够,表示能力;B. may可以,表示许可;C. must必须;D. could可能,可以。登机前必须安检。故选C。【点评】情态动词词义辨析。以及can、may、must、could四个词的词义和用法。 3.A hard-working man ______ become a great scientist, but a great scientist _______ be a hard-working man. A. can't; can B. may not; must C. can't; must D. may not; can 【答案】 B 【解析】【分析】句意:一个勤奋的人可能不会成为一位伟大的科学家,但是一位伟大的科学家一定是一个勤奋的人。can't不可能,不会;can可能,能,会;may not 可能不;must 必须,一定;结合句意,可知,第一个空为“可能不”,第二个空为“一定”,故答案为B。 【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4.Look at the sign! It says “No Smoking!” You ________ smoke here. It's dangerous. A. mustn't B. ought not to C. needn't D. don't have to 【答案】 A 【解析】【分析】句意:看这个标志!上面写道“禁止吸烟!“你不能抽烟。这是危险的。 A.mustn't 禁止,不允许; B.ought not to不应该,不应当; C.needn't不必; D.don't have to 不必。根据“No Smoking!”可知此处禁止吸烟,故答案为A。 【点评】考查情态动词。掌握情态动词的意义和用法。 5.—Shall we meet at the station at 9 a.m.? —In fact we ______. The train ______until 11a.m. A. needn't; will leave B. needn't; won't leave

情态动词的总结

情态动词的总结(综合性) 情态动词: 1.只能作为情态动词的:can/could may/might ought to must 2.可作为情态动词,也可作为实义动词:need dare 3.可作为情态动词,也可作为助动词:should/shall will/would 4.相当于情态动词:have to used to Can/could : 1、能力ability (could是其过去式) 2、猜测用于否定句和疑问句中(could是其过去式) 3、可能性征求许可(could比它更委婉一些) 4、有时会,一时可能 be able to 过去某一次成功做某事,指的是经过一定的努力才得以成功 may/might 1、征求许可 2、推测,用于肯定句当中 3、祝愿 might表推测,语气更加不肯定,指现在或将来,只有在宾语从句当中,才有表示过去的可能性Will/would 1、纯将来时态,意愿意志决心(would是其过去式) 2、习惯性、倾向性总是总会(would是其过去式) 3、表示请求用于第二人称的疑问句当中would更加委婉 4、一时拒绝,不愿听从命令 would和used to的区分: would:过去常常,但是只能表示过去的习惯性动作,不能表示状态,现在可能这样,也可能不这样Used to:过去常常,既可表示过去的动作,也可表示过去的状态,不过现在不再是那样的状态Shall 1、将来时态,第一人称陈述句 2、表示征求许可,第1、3人称的疑问句当中 3、第二人称或第三人称,表示许可,警告,命令,决心,威胁,法律条文 Should 1、义务建议,应该 2、表示推测按理应该 3、表示惊讶,不满,竟然 Must 1、必须做(责任义务) 2、推测,肯定句当中,一定、准是、语气非常肯定 3、偏要,指做一些让人不满的事 以must开头的疑问句和以need开头的疑问句回答(略) Need 1、做情态动词(用于否定句和疑问句当中) 2、做实义动词 情态动词+have done的形式 A.对过去事实的推测 1、must have done 一定做了 2、can’t/couldn’t have done 不可能做了 3、may/might have done 可能已经做了某事 B.对过去事实的虚拟 1、ought to /should have done 本该做却没做 2、shouldn’t have done 本来不该做却做了 3、needn’t have done 本不必做的事情却做了 4、could have done 本来能做的事情却没有做

英语情态动词的用法大全附解析

英语情态动词的用法大全附解析 一、初中英语情态动词 1.—We've got everything ready for the picnic. —Do you mean I __________ bring anything with me? A. can't B. mustn't C. couldn't D. needn't 【答案】 D 【解析】【分析】句意:—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗?A. can't 不能;B. mustn't 表示禁止,一定不要;C. couldn't不能,表示过去时态;D. needn't不必。结合句意,故选D。 【点评】本题考查情态动词的用法。 2.—How amazing this robot is! —Wow, it has video cameras in its eyes, so it “see” and interact with pe ople. A. may B. can C. must D. should 【答案】 B 【解析】【分析】句意:—这个机器人多么惊人啊!—哇,在它的眼睛里有摄像机,因此它能看见和人打交道。A. may 可以,可能;表示许可,B. can 能;表示能力,C. must 必须;D. should应该;根据it has video cameras in its eyes,可知是有能力看见,故选B。 【点评】考查情态动词辨析。熟记情态动词的含义和用法。 3.—Where is George? —He _______ be here just now. His coffee is still warm. A. need B. can't C. must D. shouldn't 【答案】 C 【解析】【分析】句意:——乔治在哪里?——他刚才一定在这里,他的咖啡还是热的。A. need需要; B. can't 不能,不可能(表示推测); C. must 必须,一定(表示推测); D. shouldn't不应该;根据His coffee is still warm.可知表示肯定推测一定在这儿;故答案为C。 【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4.— Sorry, I forgot to take money with me. Maybe I can't buy the book you like. — Mum, you ______ worry about it. We can pay by Alipay (支付宝). A. can't B. needn't C. mustn't D. shouldn't 【答案】 B 【解析】【分析】句意:——对不起,我忘记带钱了。也许我不能买你喜欢的书。——妈妈,你不用担心。我们可以用支付宝支付。A. can't不能,指不允许或否定推测;B. needn't 不需,指没必要;C. mustn't不能,表禁止;D. shouldn't不应该,表建议。根据句意语境,本句是说妈妈不需要担心,故答案为B。 【点评】考查情态动词。理解句意并掌握情态动词的意义和用法区别。

人教版英语八年级上英语情态动词复习总结附解析

人教版英语八年级上英语情态动词复习总结附解析 一、初中英语情态动词 1.— Dick, ________ I use your e-dictionary? — Yes, sure. ________ you give it to David after you use it? A. will; Would B. may; Might C. can; Could D. shall; Should 【答案】 C 【解析】【分析】句意:一Dick我可用一下你的电子词典吗?一当然可以。在你用完后你能把它给他David吗?根据句意及题干分析第一空表示请求允许,所以可以用may或can;第二空是表示对别人的请求.所以用could表示更加委婉,故选C。 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.— __________I wear a tie to Janet's birthday party? — No,you needn't. But do remember to bring her a present. A. Must B. Should C. Need D. Can 【答案】 A 【解析】【分析】句意:——我必须戴领带去参加Jane的生日聚会吗?——不,你不必,但是记住给她带个礼物。对于must的否定回答是用needn't。而should应该;need需要;can可以。所以根据回答可知选A。 【点评】考查情态动词的基本用法。 4.Please don't make so much noise. I ________ hear the speaker very well. A. needn't B. can't C. shouldn't D. mustn't 【答案】 B

初中情态动词用法总结

专项:情态动词 一考点:情态动词的用法和辨析,情态动词表示推测和可能,由情态动词引导的一般疑问句的回答。 二类型:1 只是情态动词:can, could, may, might, must 2 可做情态动词,可做实义动词:need, dare 3 可做情态动词,可做助动词:will, would, shall, should 4 特殊:have to, ought to, used to 三特征:1 有一定的词义,但不能单独作谓语,必须与行为动词和系动词连用构成谓语。 2 无人称和数的变化。(have to 除外) Eg: He has to stay here. 3 后接动词原形。 4 具有助动词作用,可构成否定,疑问或简短回答。 四用法: 1. can ①表示能力,“能,会”。Eg : Can you play basketball? ②表示怀疑,猜测,常用于否定句或疑问句。 Eg :Li hua can’t be in the classroom. ③表示请求,允许,多用于口语,译“可以”= may. Eg: you can go now. ④can 开头的疑问句,肯定句,否定句用can或can’t. 2.could①can 的过去式,表示过去的能力。 Eg :I could swim when I was seven years old. ②could 开头的疑问句,肯定和否定回答用could, couldn’t如果could 表示现在的委婉,用can 回答。 Eg: Could I have a drink? Yes, you can. 3.may①表示推测,“可能,也许”,用于肯定句。 Eg: He may come tomorrow. ②表示请求,“许可,可以”。Eg: May I borrow your book? 注:表示请求,许可时,主语为第一人称的一般疑问句,否定回

英语情态动词用法详解

英语情态动词用法详解 一、单项选择情态动词 1.Look! There are so many mistakes in your composition. You ________ have fixed full attention on it. A.can B.should C.need D.might 【答案】B 【解析】 【详解】 考查情态动词。句意:看!你的作文里有那么多的错误。你本应该把所有的注意力都集中在它上面的。表示“本应该做但实际上没有做”应该用should have done结构,can have done 表示可能;need表示需要;might have done表示可能做过某事;故选B。 2.---Hi, Johnson, any idea where Susan is? ---It is class time, so she __________ in the classroom now. A.can be B.must have been C.might have been D.should be 【答案】D 【解析】 考查情态动词的用法。A. can be可能,可以是;B. must have been一定(对过去事实肯定的推测);C. might have been可能(对过去事实肯定的推测);D. should be应该是。句意:—知道苏珊在哪里吗?—现在是上课时间,她应该在教室里。故答案选D。 3.The room is so clean. He ________ have cleaned it yesterday evening. A.will B.need C.can D.must 【答案】D 【解析】 【详解】 考查情态动词表推测。句意:房间如此干净,他一定是昨天晚上打扫过了。must have done 表示对过去发生的事情有把握的猜测,意思是“一定(做过)”,故D项正确。 4.— Excuse me, do you mind if I open the window? — Well, if you __________. I can put on more clothes. A.can B.may C.must D.shall 【答案】C 【解析】

英语专题复习_情态动词will的用法归纳

情态动词will与would的用法 一、情态动词will的用法归纳 1. will“惯于,老是,总是”表示主语的习惯性,倾向性,经常性,必然性,不可避免性。(will 用于一般的习惯,would 用于描述过去的习惯或例行的活动)如:People will talk.人总会说闲话。 Boys will be boys.男孩终究是男孩。(倾向性) Water will boil at 100℃. 水在100℃时沸腾。 Jealousy will spoil friendship.嫉妒会破坏友谊。 Accidents will happen.(不可避免性) I’ve lost my keys _____that would happen!我把钥匙丢了---这种情况老是发生!Sometimes he will wander in the hills all afternoon 有时他会整个下午在山里漫游(现在习惯) Every morning he will have a walk along this river. If today is Monday, tomorrow will be Tuesday.(必然性) The young man will sit there for hours doing nothing. 那个年轻人常几个小时坐在那儿无所事事。(现在习惯) The young man would sit there for hours doing nothing. 那个年轻人常几个小时坐在那儿无所事事。(过去习惯) He will often read deep into the night.他会读书到深夜。(现在习惯) He would often read deep into the night.他会读书到深夜。(过去习惯) ﹡Sh e __________ listen to records, alone in her room for hours. We just won’t interrupt her, for we know this is her usual way to stay in peace. A. might B. must C. will D. should 【解析】答案为C。will作为情态动词有一个很重要的用法,就是表示习惯性动作,此句翻译成:她常常独自一人在房间里听唱片,一听就好几个小时。注意:will在这里不是表示“将来”。 ﹡Only in summer ___________. A. will the ice melt B. the ice will melt C. the ice can melt D. the ice melts 【解析】答案为A。当表示某些根据自然规律必定会发生的事情时,常常使用这种表达,如If the pure water is heated to 100℃, it will boil. 如果纯净的水加热至100℃,它就会沸腾。will的这种用法经常会出现在科技英语中。上题由于将“only in summer”置于句首,所以要使用倒装结构。 2. will“愿、要,会”表示意志、意愿,决心,诺言等。例如: I have made up my mind to go and I will. (意志) We will fight on until final victory is won. I will do my best to help you.(意愿)

相关主题