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初中英语情态动词讲解

时间:2016-04-13 来源:唯才教育网 本文已影响

篇一:初中英语情态动词的基本用法讲解

初中英语情态动词的基本用法讲解

1. can (could)

1)表示能力,could主要指过去时间。

Two eyes can see more than one. 两只眼比一只眼看得清。

Could the girl read before she went to school? 这女孩上学前能识字吗?

2)表示可能(理论上或是逻辑判断上)。

The temperature can fall to –60℃, that is 60℃ below freezing.

气温可降至—60℃,也就是零下60℃。

He can’t (couldn’t) have enough money for a new car. 他不可能有足够的钱买新车。 You mustn't smoke while you're walking around in the wood. You could start a fire.

在林子里走时勿吸烟,那样可能会引起火灾。

3)表示允许。

Can I have a look at your new pen? 我可以看一看你的新钢笔吗?

He asked whether he could take the book out of the reading-room.

他问他可不可以把书带出阅览室。

4)表惊异、怀疑、不相信等态度。主要用于否定句、疑问句或感叹句中。

Where can (could) they have gone to? 他们会去哪儿了呢?

He can’t (couldn’t) be over sixty. 他不可能超过六十岁。

How can you be so careless? 你怎么这么粗心?

5)比较委婉客气地提出问题或陈述看法。

Can (Could) you lend me a hand? 帮我一把好吗?

I’m afraid we couldn’t give you an answer today. 恐怕我们今天不能给你答复。

2. may (might)

1)表允许,might可以指过去时间,也可指现在时间,语气更委婉。

You may take whatever you like. 你喜欢什么就拿什么。

He told me that I might smoke in the room. 他告诉我可以在房间里抽烟。

May (Might) I ask for a photo of your baby? 我可以要一张你宝宝的照片吗?

在回答以may引起的问句时,多避免用这个词,而用其它方式,如Yes, please. / Certainly. / Please don’t ./ You’d better not. / No, you mustn’t.等,以免显得太严峻或不客气。

2)表可能(事实上)。可以指过去时间,也可以指现在时间,但语气更加不肯定。 He may be at home. 他可能在家。

She may not know about it. 她可能不知道这件事。

He was afraid they might not agree with him. 他担心他们可能不同意他的意见。

They might be having a meeting, but I’m not sure. 他们有可能在开会,不过我不肯定。

3. must

1)表示义务。意为“必须”(主观意志)。

We must do everything step by step. 我们一切都必须循序渐进地做。

You mustn’t talk to her like that. 你不可能那样对她说话。

--Must we hand in our exercise—books now? 我们现在就要交练习本吗?

--No, you needn’t. / No, you don’t have to. 不必。(这种情况下,一般不用mustn’t)

2)表示揣测。意为“想必、准是、一定”等,只用于肯定句。

He must be ill. He looks so pale. 他准是病了。他的脸色苍白。

She’s wearing a diamond necklace. She must have a lot of money. 她戴着钻石项链,一定

很有钱。

4. shall

1)表征询意见,用于第一、第三人称疑问句。

Shall I get you some tea? 我给你点茶好吗?

Shall the boy wait outside? 让那男孩在外面等吗?

What shall we do this evening? 我们今晚做什么?

2)表说话人的意愿,有“命令、允诺、警告、决心”等意思,用于第二、第三人称陈述句。

You shall do as I say. 按我说的做。(命令)

You shall have my answer tomorrow. 你明天可以得到我的答复。(允诺)

He shall be sorry for it one day, I tell you. 有一天他会后悔的,我告诉你。(警告)

Nothing shall stop us from carrying out the plan. 什么也不能阻止我们执行这项计划。(决心)

5. will

1)表意愿,用于各种人称陈述句。

I will do anything for you. 我愿为你做任何事。

None is so blind as those who won’t see. 不愿看的人眼最瞎。

If you will read the book, I’ll lend it to you. 如果你愿意读这本书,我会把它借给你。

2)表请求,用于疑问句。

Will you close the window? It’s a bit cold. 请你把窗户关上好吗?有点冷。

Won’t you drink some more coffee? 再来一点咖啡好吗?

3)表示某种倾向或习惯性动作。

Fish will die out of water. 鱼离开水就不能活。

The door won’t open. 这门打不开。

The boy will sit there hour after hour looking at the traffic go by.

那男孩常常坐在那里好几个钟点,看着车辆行人通过。

6. should

1)表义务。意为“应该”(某件事宜于做),用于各种人称。

You should be polite to your teachers. 你对老师应该有礼貌。

You shouldn’t waste any time. 你不应该浪费时间。

2)表推测,意为“想必一定、照说应该、估计”等。

The film should be very good as it is starring first-class actors.

这部新电影是一流演员主演的,估计拍得很好。

They should be home by now. 照说他们现在应当已经到家了。

7.would

1)表意愿。

They would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。 I said I would do anything for you. 我说过我愿意为你做任何事。

2)表委婉地提出请求、建议或看法。

Would you like another glass of beer? 再来杯啤酒好吗?

Would you mind cleaning the window? 请把窗户擦一下好吗?

They wouldn’t have anything against it. 他们不会有什么反对意见。

3)表过去反复发生的动作或过去的一种倾向。

Every time she was in trouble, she would go to him for help.

她每遇到麻烦都会向她求助。他告诉我盒子打不开了。

8. ought to

1)表义务,意为“应该”(因责任、义务等该做),口气比should稍重。

You are his father. You ought to take care of him. 你是他父亲,应当管他。

You oughtn’t to smoke so much. 你不应该抽这么多烟。

2)表推测,暗含很大的可能,语气较弱。

Han Mei ought to know his telephone number. 韩梅该知道他的电话号码。

There’s a fine sunset; it ought to be a fine day tomorrow. 今天有晚霞,明天应该是个好天。

9. used to

表示过去的习惯动作或状态,现在不复发生或存在。疑问式和否定式有两种。

He used to live in the countryside, but now he lives in the city.他过去住在乡下,现在住在城里。 There used to be a building at the street corner, but it has been pulled down.

街道拐角处过去有座楼房,现在拆了。

I usedn’t (didn’t use) to smoke. 我过去不抽烟。

Used you (Did you use) to go to school on foot? 你过去常步行去学校吗?

篇二:2013初中英语情态动词讲解

2014年初中英语情态动词用法详解 【知识梳理】

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。

考点一:can,may,must等情态动词在陈述句中的用法:

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.

【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]

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 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. 1

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)对must引导的疑问句,肯定回答为must,否定回答或don’t have to .如:—Must I finish my homework?我现在必须完成作业吗

(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?(注意反意疑问句的后半部分)You must have met uncle Wang in the shop (注意反意疑问句的后半部分)

5. need的用法:

(1).need表示需要、必须,主要用于否定句和疑问句中,,意为“没有必要,不必”。用need提问时,肯定回答don’t have to。如:—Need I stay here any longer? 我还有必要留在这儿吗?—Yes, you must .是的。—No. you /don’t have to.不,你不必。

(2).need还可以作实义动词,此时有人称、数和时态的变化,如果是人作主语后边多接动词不定式。如:I need to do it right now.我需要马上做这件事。He needs to learn more about the girl.他需要多了解那个女孩。

如果是物作主语,一般用need doing与need to be done这种情况下应注意两点:

①.主动形式的动名词doing具有被动的含义;②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如:. The door needs painting. = The door needs to be painted.那扇门 2

需要油漆一下。Your car needs mending. = Your car needs to be repaired.你的车需要维修了。

7. shall的用法:

shall表示征求对方意见(多用于第一、三人称),如:Shall we go out for a walk?我们出去散步好吗?

在英语中,我们可以用其他多种方式提出我们的建议或征求对方意见。

(1).用“Let's do...”来提出建议。如:Let's go for a walk after supper.

(2).用“What/How about...?”来提出建议;about后接名词或动词ing形式。如:What about/How about a drink? What about/How about taking Tom with us?

(3).用“Why not...?”来提出建议,表示“何不??”not面后接动词原形。“Why not...?”实际上是“Why don't you/we...?”的简略形式。如:Why not meet at the school gate at eight? Why don't we stay here another day?

(4).用“Would you like...?”来提出建议,意思是“你想要??吗?”Would you like后可接名词或不定式。如:Would you like a cup of tea? Would you like to go and see her?

因此,如果我们说:“去游泳好吗?”英语中可有这样几种表达法:Shall we go for a swim? Let's go for a swim,shall we? What about/How about going swimming? Why not go for a swim? Would you like to go for a swim? What do you think of going for a swim?

8. should的用法:

(1).should意为“应该”,可表示劝告、建议、义务、责任等。如:We should protect the environment.我们应该保护环境。

(2)Should have done表示对过去动作的责备、批评。如:You should have finished your homework.

你应该已经完成作业了。(事实上你没有完成。)

9. will的用法:

will表示意愿、意志、打算,可用于多种人称。如:I will help you if I’m free this afternoon.今天下午如果我有空,我就会帮你。

注意:

1、will在there be句型中的形式及其句式变换。

由于“一般将来时”的结构可以用“will+动词原形”来表示,所以there be句型的一般将来时的形式就是there will be。(一定不能说there will have)例如:There are many students in our school.→There will be many students in our school. There will be a sports meeting next week.一 3

定不能说:There will have a sports meeting next week.

2、will与be going to do something区别:

①. be going to表示近期、眼下就要发生的事情,will表示的将来时间则较远一些,如:He is going to write a letter tonight. He will write a book one day.

②. be going to表示根据主观判断将来肯定发生的事情,will表示客观上将来势必发生的事情。He is seriously ill. He is going to die.He will be twenty years old.

③. be going to含有“计划,准备”的意思,而will则没有这个意思,如:She is going to lend us her book.

He will be here in half an hour.

④.在有条件从句的主句中,一般不用be going to,而多用will,如:If any beasts comes at you, I'll stay with you and help you.

10. had better的用法:

had better意为“最好”,没有人称的变化,后面接不带to的不定式,其否定形式为:had better not。如:

We had better go now.我们最好现在就走。You had better not give the book to him.你最好不要把这本书给他。

考点二:含有情态动词的疑问句的回答:

1.对may引出的问句,可以有下列回答方式:Yes,you may. Yes, of course. Yes, certainly. Sure . No, you can’t.

2.对must引出的疑问句,回答方式为:Yes, …must. No,…don’t have to.

3.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 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)

4. shall引出的疑问句用于第一人称,表示征求对方意见或客气的请求。其回答方式有以下几种:

Yes, please. All right. No, thank you.

5.would you…的回答方式有以下几种:Yes, I will. (No, I won’t.) Sure . (I’m sorry , I can’t.) All right/ OK/ With pleasure. Certainly. (No, thank you .) Yes, please.

【例题】—Would you do me ass on my thanks to Lily?—________.

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A.That’s right B.With pleasure D.No trouble

【解析】A.意为“对了”,B.意为“乐意效劳”, C.意为“没关系” D.意为“不费事”。答案:B 考点三:不同情态动词的否定意义也不同:

1.(1).can’t可译为“不会”,如:I can’t play basketball.我不会打篮球。

(2)当句子表推测时,用can’t表达不可能,如:He can’t be ill. He is playing chess with Tom.他不可能病了,他正和Tom下棋呢。

(3)can’t还可用来回答“ May I …? ”这样的问句。如:May I come in ? 我可以进来吗?No, . / can’t.不,你不能。

(4)can’t还可用于固定习语中。can’t help doing禁不住,情不自禁

can’t wait to do something迫不及待地要做?

如:She can’t help crying.她不禁大哭起来。

The children can’t wait to open the box.孩子们迫不及待地想打开盒子。

2. may的否定式为may not,译成“可能不”,如:He may not be at home.他也许不在家。 考点四:情态动词的被动语态

含有情态动词的被动语态的结构为:情态动词+ be + done (动词的过去分词)。做题时要兼顾情态动词和被动语态这两个方面。She should speak to her mother in that way.她不应该用那种方式和妈妈说话。More and more trees must be planted in China.在中国必须种植更多的树木。Many of the stars can not be seen because they are far away from us.很多星星我们都看不到,因为它们离我们太远了。

考点五:情态动词表示推测的用法:

一、“情态动词+动词原形”表示对现在的推测。

1、can表示推测时一般用于否定句或疑问句。如:That man can't be her husbandshe is still single.

Who is knocking at the door? Can it be the postman?

2、must表示肯定的推测,一般用于肯定句中。如:He must be in his office now.Mr Li must be working now,for the lights in his office are still on.

3、might表示推测时不一定是may的过去时,只是表示其可能性较小。如:The man may be the headmaster.

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篇三:初中英语情态动词讲解_练习及答案

情态动词

一、 考点、热点回顾

【词汇辨析】

1. sometimes/ some times/sometime/ some time:

sometimes: “有时”=at times. He is sometimes late for school.

some times: “几次”I have been to Nanjing some times.

sometime: “某一时刻” I bought it sometime last spring.

We’ll meet again sometime next week.

some time: “一段时间” We have to stay here for some time.

2. many/ much/ a few/ a little/ few/ little

(1)many修饰可数名词,much修饰不可数名词;都表示许多。例如:

许多书许多牛奶 (2)a few和a little都表示"有一点儿",侧重于肯定,相当于"some",但a few修饰可数名词,

a little修饰不可数名词,例如:

He has a few friends in London.

---Would you like some coffee?

---Yes, just a little.

(3)few和little表示"几乎没有",侧重否定。few后接可数名词,little后接不可数名词。例如:

He is a strange man. He has few words.

Hurry up, there is little time left.

【固定搭配】加-ing

be busy doing sth. 忙于做?? eg: Mother is busy cooking.

look forward to + doing sth. 期待做?? eg: Tom looks forward to seeing his father again.

Thank you for (doing) sth. 为了?感谢你 eg: Thank you for your help.

愉快地做某事 eg: I had great fun playing in the water.

=have a good time doing sth eg: I had a good time playing in the water.

做某事有困难

eg: I have difficulty finishing my homework in 2 hours.

【情态动词】 又叫情态助动词。它们具有以下特点:

⑴ 它们必须与其他动词连用,即:情态动词+动词原形

表示说话人对所述动作的看法,如需要、可能、意愿或怀疑等。

⑵ 绝大多数情态动词没有人称和数的变化,即第三人称单数不加-s

(以be和have 开头的情态动词短语除外)。

⑶ 在意义上,情态动词具有“多义性”。

例:can既可表示能力,又可表示可能、允许等意义。

【情态动词的基本用法】

1. can的基本用法:

⑴ 表示体力或智力上的能力,即“能够,会”,可与be able to转换。

例:He can speak English. = He is able to speak English.

—Can you play basketball?

— No, I can’t.

如果表示将来具备的能力,要用will be able to。

例:If I have a good sleep, I will be able to do the problem.

⑵ 表示许可,主要用于口语,书面语一般用may。

例:—Can we go home now, please?

— No, you can’t.

You can only smoke in this room.

You can’t keep the library books for more than a month.

⑶ 表示“可能”,与may同义,但一般用在疑问句中。

例:What can he possibly want?

在否定句中,否定形式can’t表示推测“不大可能”。

例:Anybody can make mistakes.

The news can’t be true.

与第一、二人称连用时,还可以就可能的解决问题的方式或可能的行为提出建议。在这里,也可用

could使语气婉转。

例:Can / Could we meet again next week? 下周我们可以再见面吗?

—What shall we do? 我们怎么办呢?

— We can / could try asking Lucy for help. ——我们可以请露茜帮忙试试看。

You can / could help me with the cooking. 你可以帮我做饭。

2. may的基本用法:

⑴ 表示“许可”,用can比较口语化。

例:You may / can come if you wish. 如果你想来,你就来。

You may not pick flowers in this park. 本公园内不许摘花。

表示按规定不许可,如果用mustn’t则表示说话人不许可。)

我可以在这里抽烟吗?

mustn’t表示明确的禁止。)

例:It may rain tomorrow. 明天可能会下雨。

注意:如果

例:那会是真的吗?

他究竟是谁呢?

⑶ 【注意】:

——No3. must的基本用法:

⑴ 表示必须,强调说话人的主观意志。

例:I must go now, or I’ll be late.

ten o’clock.

【注意】:表示“必须“时,

must的否定式为,而不是mustn’t。

也就是:—Must

——例:——

⑵ 表示推测,一般只用于肯定陈述句,表示非常肯定。

例:She didn’t look at me. She must be angry. 她不朝我看,一定是生气了。

He is good at English. He must know the word. 他英语好,准知道这个词。

You must be Mr. Jones. 想必您就是琼斯先生吧。

4. have to的基本用法:

have to可视为情态动词,但它与其他情态动词在用法上稍有不同。其他情态动词没有人称和数的变化,而have to却有人称和数的变化,要视主语的不同而变化。

例:I / You / We / They have to….

He / She / It to….

You don’t to….

to…?

强调主观需要

have to强调客观需要。

例:Sorry, I have to leave now. 对不起,现在我得走了。

Igo to a meeting. 我得去参加一个会议。

Will hework deep into the night? 他将不得不工作到深夜吗?

5. need的基本用法:

need的基本词义是“需要”,它既可作情态动词,又可作实义动词。

⑴ need用作情态动词时,只用于否定句和疑问句。它只有一种形式,后接动词原形。

例:I don’t believe you need worry. 我相信你没有必要焦急。

—Need we go so soon? 我们需要这么早就去吗?

— Yes, we . / No, we 是的,必须。/不,不必。

So I needn’t tell him, need I? 所以我不需要告诉他,对吧?

请比较以下两句话的不同意思:

你没有必要买那件外衣。(你还没买)

My watch needs . 我的手表需要修理了。

We don’t need to work today. (= We needn’t work today.)

Does he need to go right now? (= Need he go right now?)

6. had better的基本用法:

to的动词不定式。

You’d better not do that again. 你最好别再做那件事。

What had we better do now? 我们现在怎么做才好呢?

Hadn’t7. could, should, would, might表示推测:

①. must多用于肯定句中表示把握性极大的推测,意思为“一定、肯定”。

如: You have worked hard all day. You must be tired. 你已辛苦工作一整天了,一定累了。

The book must be his. His name is on the cover. 这本书一定是他的,封面上写着他的名字。

【注意】 must不表推测时,在肯定句中意思为“必须(强调内在的职责)”,在否定句中意思为“不许、禁止”,以它开头的疑问句否定回答常用needn’t或don’t (doesn’t) have to。

如:We must obey the traffic rules. 我们必须遵守交通规则。

Cars mustn’t be parked here. 此处严禁停车。

—Must we hand in the papers this week? 我们必须本星期交论文吗?

—No, you needn’t. 不,你们不必(本星期交)。

②. can / could

中表示推测、怀疑,两者在时间上没有差别。用can时不相信的程度更强一些,

如 这个人不可能是Tom,他已经去英国了。 Can it be true that he was fooled by a five-year-old boy? 他被一个五岁的孩子愚弄了,这能是真的吗?

Could this be an excuse? 这会不会是个借口?

How can you be so careless! 你怎么这样粗心!

意思为“也许、可能”, might比may的把握性更小一些。

“不可能”与“可能不”在把握性大小上的差异。)

如may umber.王先生也许知道李教授的电话号码。

This the key Tom has been looking for.这可能就是汤姆一直在找的钥匙。

She 今天她可能不在那儿。

典型例题一.选择题

1. It is usually warm in my hometown in March, but it ____ be rather cold sometimes.

A. mustB. can C. should D. would

2. You ______ be hungry already ---- you had lunch only two hours ago!

A. wouldn’t B. can’t C. mustn’tD. needn’t

3. ---- What do you think we can do for our aged parents?

---- You ____ do anything except to be with them and be yourself.

A. don’t have toB. oughtn’t to C. mustn’t D. can’t

4. John promised his doctor he ______ not smoke. And he has never smoked ever since.

A. mightB. should C. could D. would

5. What a pity! Considering his ability and experience, he ______ better.

A. need have done B. must have doneC. can have doneD. might have done

6. Liza ______ well not want to go on the trip ---- she hates traveling. A. will B. can C. must D. may

7. She ______ have left school, for her bike is still here. A. can’t B. wouldn’t C. shouldn’t D. needn’t

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

A. may B. can C. wouldD. should

9. ---- I can’t find my purse anywhere.---- You ______ have lost it while shopping.

A. may B. can C. shouldD. would

10. ---- I’m sorry. I _______ at you the other day.---- Forget it. I was a bit out of control myself.

A. shouldn’t shout B. shouldn’t have shoutedC. mustn’t shoutD. mustn’t have shouted

11. ---- What sort of house do you want to have? Something big? ---- Well, it _______ be big ---- that’s not important.

A. mustn’t B. needn’t C. can’t D. won’t

12. ---- What does the sign over there read?

---- “No person _______ smoke or carry a lighted cigarette, cigar or pipe in this area.”

A. willB. may C. shall D. must

13. Some aspects of a pilot’s job ______ be bring; and pilots often _______ work at inconvenient.

A. can; have toB. may; canC. have to; may D. ought to; must

14. My MP4 player isn’t in my bag. Where _______ I have put it? A. can B. must C. shouldD. would

15. The weather turned out to be fine yesterday, I _____ the trouble to carry my umbrella with me.

A. should have taken B. could have taken C. needn’t have takenD. mustn’t have taken

16. In crowded places like airports and railway stations, you ______ take care of your luggage.

A. can B. may C. mustD. will

17. ---- She looks very happy. She ______ have passed the exam. ---- I guess so. It’s not difficult after all.

A. should B. could C. must D. might

18. I told your friend how to get to the hotel, but perhaps I _______ have driven her there.

A. could B. must C. mightD. should

19. ---- Mr. Gordon asked me to remind you of the meeting this afternoon. Don’t forget it!----OK, I _______.

A. won’tB. don’t C. can’t D. needn’t

20. ---- How is your tour around the North Lake? Is it beautiful? ---- It _______ be, but it is now heavily polluted.

A. willB. wouldC. shouldD. must

21. The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.A. shan’tB. can’tC. needn’tD. mustn’t

22. ---- Where is my dictionary? I remember I put it here yesterday.---- You _______ it in the wrong place.

A. must put B. should have putC. might put D. might have put

23. ---- What’s the name? ---- Khulaifi. ______ I spell that for you?

A. ShallB. Would C. CanD. Might

24. ---- Who is the girl standing over there ? ---- Well, if you ______ know, her name is Mabel.

A. mayB. canC. mustD. shall

25. I was really anxious about you. You _______ home without a word.

A. mustn’t have leftB. shouldn’t have left C. couldn’t have leftD. needn’t have left

26. My sister met him at the Grand Theatre yesterday afternoon, so he ______ have attended your lecture.

A. couldn’t B. needn’tC. mustn’tD. shouldn’t

27. ---- Are you coming to Jeff’s party? ---- I’m not sur. I _______ go to the concert instead.

A. must B. would C. should D. might

28. Johnny, you ________ play with the knife. You ________ hurt yourself.

A. won’t; can’t B. mustn’t; may C. shouldn’t; must D. can’t; shouldn’t

29. You _______ pay too much attention to your reading skill, as it is so important.

A. shouldn’t B. cannotC. mustn’t D. needn’t

30. ---- Is John coming by train? ---- He should, but he ______ not. He likes driving his car.

A. must B. may C. can D. need

二.完形填空

Have you ever seen the advertisement: Learn a foreign language in six weeks, give your money back? Of course, it happens quite like that. The only language to learn is the mother language. And think practice is needed for that. Before the Second World War people usually learned a foreign languagethe literature(文学) of the country. Now most people want to a foreign language. Every year millions of people start learning .

How do they do it? Some people try at home books and tapes, others go to evening classes or watch TV programs. they use the language only 2 or 3 times a week, learning it will a long time, like language learning at school. A few people try to learn a language fast by studying for 6 or hours a day. It's much easier to learn the language in the country where it to do this, and many people don't have to do so. Machines and good books will be very the language is learned quickly or slowly, it is hard work.

()1. A. soB. orC. and

D. but D. often

D. easy

D. how many

D. study

D. say

D. it

D. by

D. Until

D. cost

D. less

D. is spoken

D. not possible ()2. A. can'tB. impossible()3. A. easilyB. difficult ()4. A. how much B. how long ()5. A. studied ()6. A. talk()7. A. them ()8. A. without ()9. A. If B. tell C. never C. ableC. how fast B. to study C. studying C. speak C. thatB. this B. with C. in C. takeC. other B. When C. Since ()10. A. spend B. use ()11. A. some B. more ()12. A. speaksB. is speaking C. spoke ()13. A. able B. possible C. unable

篇四:初中英语情态动词讲解

情态动词

(一)情态动词的定义: 情态动词表示说话人对某一动作或状态的态度。

(二)情态动词的特点

1. 情态动词有一定的词义。2. 情态动词不能单独做谓语,它必须和其他动词的原形一起构成谓语。3. 情态动词没有人称,数的变化。

(三)情态动词的结构和意义

1.情态动词的基本句型

? 肯定句: 主语+情态动词+动词原形+......

? 否定句: 主语+情态动词+not+动词原形+......

? 疑问句: 情态动词+主语+动词原形+......

2. 情态动词的意义

must“必须” ; can/could“能,会” ; may/might “可以”; should“应该”;

would“愿,要” ; have to“不得不” ; need“需要”

(四)情态动词的基本用法

1.can (could主要指过去时间 )

1) 表示人或物本身所具有的能力,意为“能,能够,会” :

Two eyes can see more than one./I can swim very well.

2) 表示可能(理论上或是逻辑判断上)

He can’t (couldn’t) have enough money for a new car.

3) 表示允许:

Can I have a look at your new pen?

He asked whether he could take the book out of the reading-room.

4) 表示对现在动作或状态的猜测,主要用于否定句和疑问句中或感叹句中:

He can’t (couldn’t) be over sixty.他不可能超过六十岁。

5) could表示比can更委婉客气的提出问题或陈述看法,指的是现在时间。

Can (Could) you lend me a hand? 帮我一把好吗?

2. may (might)

1)表允许,询问或说明一件事可不可以做,might指过去时间;但在疑问句中might也可指现在时间,语气比may更委婉。

May (Might) I ask for a photo of your baby?我可以要一张你宝宝的照片吗?

在回答以may引起的问句时,肯定回答是一般可仍用may,或Yes, please. / Certainly./Sure./Of course. ;

否定回答根据说话人的语气由强到弱分别选用: must not(mustn’t)(禁止)/ had better not(最好别)/ may not(不行)

2) may表可能,但所表示的可能性不如can所表示的那样肯定。might可以指过去时间,也可以指现在时间,但语气更加不肯定。

He may be at home.他可能在家。

They might be having a meeting, but I’m not sure.他们有可能在开会,不过我不肯定。

3. must(have to表示客观需要)

1)表示 “必须”(主观看法)时,用于肯定句或疑问句;用于否定句时表示“禁止”。

We must do everything step by step.我们一切都必须循序渐进地做。

You must get home before 9:00.

2)表示揣测。意为“想必、准是、一定”等,只用于肯定句。

He must be ill. He looks so pale.他准是病了。他的脸色苍白。

3)must的疑问句,肯定回答用must, 否定回答用needn’t或don’t have to。

4. should

1)表责任或义务,意为“应该”,用于各种人称。

You should be polite to your teachers.你对老师应该有礼貌。

2)表推测,意为“想必一定、照说应该、估计”等。

The film should be very good as it is starring first-class actors.这部新电影是一流演员主演的,估计拍得很好。

5.will

1)表意愿,用于各种人称。I will do anything for you.我愿为你做任何事。

2) will在疑问句中用于第二人称,表示询问对方的意愿或向对方提出请求

Will you close the window? 请你把窗户关上好吗?

6.would

1)will的过去式,表示过去时间的“意志、意愿”。

They would not let him in because he was poorly dressed.他们不让他进去因为他衣着破旧。

I said I would do anything for you.我说过我愿意为你做任何事。

2)would用于现在时间,表示比较委婉地提出请求、建议或看法。

Would you like another glass of beer?再来杯啤酒好吗?

7.need

1) need作为情态动词,主要用于否定句疑问句;作为实义动词可用于肯定句,否定句或疑问句中。 You needn’t telephone him now.你现在不必打电话给他。

2) 回答由need引起的问句时,肯定回答一般用must,否定回答是用needn’t

--Need I come? --Yes, you must. --我需要来吗? --需要。

情态动词练习题

(一) 单项选择

1. "__________ I take it out?""I'm sorry, you __________."

A. Could ...couldn'tB. Might...might not C. Could...canD. May...can

2. "Need we do this job now?" "Yes, __________."

A. you needB. you shouldC. you mustD. you can

3. __________ to have lunch with us today?

A. Do you likesB. Would you likeC. Will you likedD. Have you liked

4. -Is John coming by train? --He should, but he __________ not. He likes driving his car.

A. mustB. canC. needD. may

5. Peter __________ come with us tonight, but he isn't very sure yet.

A. mustB. canC. mayD. will

6. I thought you __________ be hungry, so I have brought you some cakes.

A. mayB. mightC. canD. could

7. Come on! We __________ hurry because there isn't much time left.

A. mayB. mustC. canD. need

8. Amy did best in the English test. She __________ hard last week.

A. must workingB. should have workedC. should workD. must work

9.—Would you like to drink some juice?

— Thanks._________,but I have drunk a lot if tea.

A. I’d love to B.I think so C.I’m afraid not D. I don’t think so.

10.—May I smoke here?—No, you______! Look, there is a “NO SMOKING”sign here.

A.mayB.may notC.needn’tD.mustn’t

11.—Listen!Helen is singing in the next room. —It_____be Helen. She has gone to Beijing.

A.can’tB.mustn’tC.mayD.should

12.—What do drivers do when the traffic lights turn red? —They______stop and wait till the green light.

A.must B.can C.may D.need

(二)根据语境用适当的情态动词填空:

1.“________I leave school now?”“No, you_______clean the classroom.”

2.It’s time for class. You________stop plalying football, or you_______be late for school.

3.“_______they answer the queation in Russion?”“No, they________.”

4.—________I hand in my paper now.

—No, you _______.But you________hand it in tomorrow.

5.“________you skate?”“No, I________.But my brother_________”

6.We_________cross the street carefully.

7.He is very clever. He_________know the answer.

篇五:初中英语情态动词讲解

初中英语情态动词讲解

★清华大学★英语系测试:为中小学生英语量身定做. 官方网站:http://qinghua.yeryy.com/

清华大学英语教授研究组提供

初中英语情态动词用法详解 【情态动词知识梳理】

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。

考点一:can,may,must等情态动词在陈述句中的用法:

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mus

初中英语情态动词讲解

t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’tshe?(注意反意疑问句的后半部分)You must have met uncle Wang in the shop yesterday you? (注意反意疑问句的后半部分)

5. need的用法:

(1).need表示需要、必须,主要用于否定句和疑问句中,其否定形式为needn’t,意为“没有必要,不必”。用need提问时,肯定回答为must,否定回答为needn’t或don’t have to。如:—Need I stay here any longer? 我还有必要留在这儿吗?—Yes, you must .是的。—No. you needn’t /don’t have to.不,你不必。

(2).need还可以作实义动词,此时有人称、数和时态的变化,如果是人作主语后边多接动词不定式。如:I need to do it right now.我需要马上做这件事。He needs to learn more about the girl.他需要多了解那个女孩。

如果是物作主语,一般用need doing与need to be done这种情况下应注意两点:

①.主动形式的动名词doing具有被动的含义;②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如:. The door needs painting. = The door needs to be painted.那扇门需要油漆一下。Your car needs mending. = Your car needs

to be repaired.你的车需要维修了。

6. dare的用法:dare意为“敢、敢于”,用法近似于need,有两种词性:

(1)dare作为情态动词,多用于否定句、疑问句或条件句中,无第三人称单数形式,只有一般现在时和一般过去时。如:Dare he tell them what he knows?他敢告诉他们所知道的情况吗?I daren’t ask her – will you do it for me?我可不敢问她,你能帮我问问吗?

(2)dare作为实义动词,此时有人称、数及时态的变化。如:He doesn’t dare to break his promise.他不敢食言。

注意:在口语中,dare的各种形式常与不带to的不定式连用。如:Do you dare tell her what I said?

你敢告诉她我说的话吗?I didn’t dare look at him.我不敢看他。

7. shall的用法:

shall表示征求对方意见(多用于第一、三人称),如:Shall we go out for a walk?我们出去散步好吗?

在英语中,我们可以用其他多种方式提出我们的建议或征求对方意见。

(1).用“Let's do...”来提出建议。如:Let's go for a walk after supper.

(2).用“What/How about...?”来提出建议;about后接名词或