如何区分情态动词must should might need老是分不清,意思是如何用。像need后面加to 就变为…………
段家技术组1256
[编辑本段]can和could的用法
1. 表示能力或客观可能性,还可以表示请求和允许.如：
Can you finish this work tonight?
Man cannot live without air.
— Can I go now? — Yes, you can.
注意：①could也可表示请求,语气委婉,主要用于疑问句,不可用于肯定句,答语应用can（即could不能用于现在时态的简略答语中）.如：
Could I come to see you tomorrow?
Yes, you can. （否定答语可用No, I'm afraid not.）
②can表示能力时,还可用be able to代替.如：
I'll not be able to come this afternoon.
2. 表示惊异、怀疑、不相信的态度.（主要用在否定句、疑问句或惊叹句中）
Can this be true?
How can you be so careless!
This cannot be done by him.
3. “can(could) + have + 过去分词”的疑问或否定形式表示对过去发生的行为怀疑或不肯定.如：
He cannot have been to that town.
Can he have got the book?
4. 用在疑问句及否定句中,表示惊讶,不相信等.
5. cannot```too\enough表示"无论怎样``````也不过分","越``````越好"[编辑本段]may和might的用法
1. 表示许可.
表示请求、允许时,might比may的语气更委婉一些,否定回答时要用mustn't表示“不可以”、“禁止”、“阻止”之意.如：
You may drive the car.
— Might I use your pen? — No, you mustn't.
用May I ... 征询对方许可在文体上比较正式,在口气上比较客气.在日常口语中,用Can I ... 征询对方意见在现代口语中更为常见.
2. 用于祈使句中表示祝愿.如：
May you succeed!
3. 表示推测、可能（疑问句不能用于此意）.
He may be very busy now.
4. “may(might) + have + 过去分词”表示对过去发生的行为的推测.如：
He may not have finished the work.[编辑本段]must和have to的用法
1. 表示必须、必要.（must表示主观多一些而have to则表示客观多一些）如：
You must come in time.
回答must引出的问句时,如果是否定的回答,不能用mustn't,而要用needn't或don't have to.
— Must we hand in our exercise books today?
— Yes, you must. (No, you don’t have to.)
2. “must be + 表语”的结构表示推测,它的否定或疑问式用can代替must.
This must be your pen.
3. “must + have + 过去分词”的结构常用在肯定句中,表示对过去发生的行为的推测.它的否定或疑问式用can代替must.
He must have been to Shanghai.
4. have to的含义与must相似,两者往往可以互换使用,但have to有各种形式,随have的变化而定.must与have to有下列几点不同：
① must表示的是说话人的主观看法,而have to则往往强调客观需要.如：
The play is not interesting. I really must go now.
I had to work when I was your age.
② must一般只表现在,have则有更多的时态形式.
③ 二者的否定意义不大相同.如：
You mustn't go. 你可不要去.
You don't have to go. 你不必去.
④ 询问对方的意愿时应用must.如：
Must I clean all the room?[编辑本段]dare和need的用法
1. need表示“需要”或“必须”,作情态动词时,仅用于否定句或疑问句中,在肯定句中一般用must, have to, ought to,或should代替.如：
You needn’t come so early.
— Need I finish the work today?
— Yes, you must.
注意：needn't + 不定式的完成式“表示本来不必做某事而实际上做了某事”.如：
You needn't have waited for me.
2. Dare作情态动词时,主要用于疑问句、否定句和条件从句中,一般不用在肯定句中.如：
How dare you say I'm unfair.
He daren't speak English before such a crowd, dare he?
3. Dare和need常用作实义动词,有时态、人称和数的变化,所不同的是,作实义动词时,在肯定句中,dare后面通常接带to的不定式,在否定和疑问句中,dare后面可接带to或不带to的不定式.如：
I dare to swim across this river.
He does not dare (to) answer.
Don't you dare (to) touch it!
I wondered he dare (to) say that.
He needs to finish it this evening.[编辑本段]shall和should的用法
1. Shall用于第一人称,表示征求对方的意愿.如：
What shall we do this evening?
2. Shall用于第一、第三人称疑问句中,表示说话人征求对方的意见或向对方请示.如：
Shall we begin our lesson?
When shall he be able to leave the hospital?
3. Shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁.如：
You shall fail if you don't work harder. （警告）
He shall have the book when I finish reading. （允诺）
He shall be punished. （威胁）
4. Should表示劝告、建议、命令,其同义词是ought to；在疑问句中,通常用should代替ought to.如：
You should go to class right away.
Should I open the window?
Should的含义较多,用法较活,现介绍三种其特殊用法.请看下面的句子：
① I should think it would be better to try it again. 我倒是认为最好再试一试.
② You are mistaken, I should say. 依我看,你是搞错了.
③ I should advise you not to do that. 我倒是劝你别这样做.
④ This is something I should have liked to ask you. 这是我本来想问你的.
从以上例句可以看出：情态动词should用于第一人称时可以表示说话人的一种谦逊、客气、委婉的语气.
Should还可以用在if引导的条件从句,表示一件事听起来可能性很小,但也不是完全没有可能.相当于“万一”的意思.从句谓语由should加动词原形构成,主句谓语却不一定用虚拟语气.如：
⑤ Ask her to ring me up if you should see her. 你万一见到她,请让她给我打个电话.
⑥ If you should change your mind, please let us know. 万一你改变主意,请通知我们.
⑦ Should I (If I should) be free tomorrow I will come. 万一我明天有时间,我就来.
此外,Why(or How) + should结构表示说话人对某事不能理解,感到意外、惊异等意思.意为“竟会”.如：
⑧ Why should you be so late today? 你几天怎么来得这么晚?
⑨ — Where is Betty living? — 贝蒂住在哪里?
— How should I know? — 我怎么会知道呢?
⑩ I don't know why you should think that I did it. 我真不知道你凭什么认为这件事是我干的.
5. “should + have + 过去分词”结构一般表示义务,表示应该做到而实际上没有做到,并包含一种埋怨、责备的口气.如： She should have finished it.
I should have helped her, but I never could.
You should have started earlier.[编辑本段]will和would的用法
1. 表示请求、建议等,would比will委婉客气.如：
Would you pass me the book?
2. 表示意志、愿望和决心.如：
I will never do that again.
They asked if we would do that again.
3. 用“will be”和“will(would) + have + 过去分词”的结构表示推测,主要用于第二、三人称.前者表示对目前情况的推测,后者表示对已经完成的动作或事态的推测.如：
This will be the book you want.
He will have arrived by now.
The guests would have arrived by that time.
I thought you would have finished this by now.
4. Would可表示过去反复发生的动作或某中倾向.Would表过去习惯时比used to正式,并没有“现已无此习惯”的含义.如：
The wound would not heal.
During the vacation he would visit me every week.
5. 表料想或猜想.如：
It would be about ten when he left home.
What would she be doing there?
I thought he would have told you all about it.[编辑本段]ought to的用法
1. Ought to表示应该.如：
You ought to take care of him.
2. 表示推测.注意与must表示推测时的区别：
He must be at home by now. （断定他已到家）
He ought to be home by now. （不十分肯定）
This is where the oil must be. （比较直率）
This is where the oil ought to be. （比较含蓄）
3. “ought to + have + 过去分词”表示过去应做某事而实际未做.如：
You ought to have asked him (but you didn't).
这时,ought to和should可以互相换用.
注意：在美国英语中,ought to用于否定句和疑问句时,to可以省略.如：
Ought you smoke so much?
You oughtn't smoke so much.[编辑本段]used to,had better,would rather的用法
1. Used to表示过去的习惯动作或状态,现在已不存在,在间接引语中,其形式可不变.如：
He told us he used to play football when he was young.
在疑问句、否定句、否定疑问句或强调句中,可有两种形式：
Did you use to go to the same school as your brother?
Used you to go to the same school as your brother?
I usedn't to go there.
I didn't use to go there.
Usedn't 亦可拼作usen't,但发音皆为[ju:znt].
否定疑问句
Usen't you to be interested in the theatre?
Didn't you use to be interested in the theatre?
I certainly used to smoke, but it was a long time ago.
I certainly did use to smoke, but it was a long time ago.
其反意疑问句或简略回答中,也有两种形式：
She used to be very fat, didn't she? （正式）/ use(d)n't she? （口语）
Did you use to play chess? Yes, I did.
Used you to get up early in the morning? Yes, I did. (Yes, I used to.)
2. Had better意为“最好”,后接不带to的不定式.如：
— We had better go now.
— Yes, we had (we'd better / we had better).
Hadn't we better stop now? (Had we better not stop now?)
I think I'd better be going. （用于进行时态,表“最好立即”）
You had better have done that. （用于完成时态,表未完成动作）
注：①had best与had better同意,但较少用.②You had better … 用于同辈或小辈,对长辈不可用.
3. Would rather意为“宁愿”,表选择,后接不带to的不定式.如：
I'd rather not say anything.
Would you rather work on a farm?
— Wouldn't you rather stay here?
— No, I would not. I'd rather go there.
由于would rather表选择,因而后可接than.如：
I would rather work on a farm than in a factory.
I would rather watch TV than go to see the film.
I would rather lose a dozen cherry trees than that you should tell me one lie.
I'd rather you didn't talk about this to anyone. （句中的'd rather不是情态动词,would在此是表愿望的实义动词）[编辑本段]can (could), may (might), 用法:
can (could) 表示说话人能,可以,同意,准许,以及客观条件许可,could 为 can 的过去式.
Can you pass me the books?
你能给我递一下书吗 ?
Could you help me, please?
请问,你能帮助我吗?
What can you do?
你能干点什么呢?
Can you be sure?
你有把握吗?
can 和could 只能用于现在式和过去式两种时态,将来时态用 be able to 来表示.
He could help us at all.
他完全可以帮助我们.
With the teacher's help,I shall be able to speak English correctly.
由于老师的帮助,我将能准确地讲英语.
may (might) 可以, 表示说话人同意,许可或请求对方许可.
You may take the book home.
你可以把书带回家去.
May I come in?
我可以进来吗?
May I use your dictionary?
我可以用你的词典吗?
You may put on more clothes.
你可以多穿点衣服.
He said he might lend us some money.
他说他可以借给我们一些钱.
may 否定式为 may not, 缩写形式是 mayn't.
might 是may 的过去式, 有两种用法, 一种表示过去式,一种表示虚拟语气, 使语气更加委婉, 客气或对可能性的怀疑.
He told me he might be here on time.
他说他能按时间来.
Might I borrow some money now.
我可以借点钱吗?
He might be alive.
他可能还活着.[编辑本段]must, need, ought to, dare (dared)用法
Must 必须,应该,一定,准是, 表示说话人认为有必要做某事, 命令, 要求别人做某事以及对事物的推测.
must 用来指一般现在时和一般将来时, 过去式可用 have to 的过去式代替.
I must finish my work today. 我今天必须完成我的工作.
You mustn't work all the time. 你不能老是工作.
Must I return the book tomorrow? 我必须明天还书吗?
After such a long walk, you must be tired. 走了这么长的路,你一定困了.
He must be the man I am looking for. 他一定是我要找的人.
He had to go because of somebody's calling him that day. 那天他要走是因为有人叫他.
must + have + 过去分词,表示现在对过去事物的推测.
He must have told my parents about it.
他一定把这件事情告诉我父母亲了.
He must have received my letter now.
他现在一定收到我的信了.
It's six o'clock already, we must have been late again.
已经六点钟了,我们一定又迟到了.
must 和 have to 的区别: must 表示说话人的主观思想, have to 表示客观需要.
You must do it now.
你必需现在就干.(说话人认为必须现在干)
I have to go now.
我得走了.(客观条件必须现在走)
need 需要 多用在否定式或疑问句中.
Need I attend the meeting tomorrow?
我需要明天参加会议吗?
You need not hand in the paper this week.
这一周你不必交论文.
need 是一个情态动词, 他的用法完全和其他情态动词一样, 但 need 还可当作实义动词使用, 这时 need 就象其他动词一样,有第三人称,单复数, 后面加带 to 的动词等特性.
I need a bike to go to school.
我上学需要一辆自行车.
Do you need a dictionary?
你需要词典吗?
She needs a necklace.
她需要一条项链.
needn't + have + 过去分词 表示过去做了没必要做的事情.
You needn't have taken it seriously.
这件事情你不必太认真.
dare 敢 多用在否定或疑问句中.
The little girl dare not speak in public.
小女孩不敢在公众面前说话.
Dare you catch the little cat?
你敢抓小猫吗?
dare 除用作情态动词外,更多的是当实义动词使用, 用法同实义动词一样,要考虑人称,单复数,时态等.
Do you dare to walk in the dark?
你敢黑夜走路吗?
He doesn't dare to tell the teacher what happened that day.
他不敢告诉老师那天发生的事.[编辑本段]ought,will ,Shall, should,have to
ought 应当,应该 后面跟带有 to 的动词不定式.
You ought to read these books if you want to know how to repair the motorcar.
如果你想知道如何修理汽车,你应该读这些书.
You ought to bring the child here.
你应该把孩子带来.
ought + to have done 句型.指过去动作,表示一件事情该做而未做.
You ought to have been here yesterday.
你昨天就应该来.
ought not to have done 句型.表示一件不该做的事情却做了.
You ought not to have taken the book out of the reading-room.
你不应该把书带出阅览室.
will (would)决心,愿望. would 为 will 的过去式,
可用于各人称.
I'll do my best to catch up with them.
我要尽全力赶上他们.
I'll never do it again, that's the last time.
我再不会做那件事情了,这是最后一次.
He said he would help me.
他说他会帮助我.
will, would用于疑问句表示说话人向对方提出请求或询问,用 would 比 will 更婉转,客气.
It's hot. Will you open the windows?
天气太热了,你能打开窗户吗?
Will you help me to work it out?
你能帮我解这道题吗?
Would you like some coffee?
给你来点咖啡怎样?
Shall, should表示命令,警告,允诺,征求,劝告,建议惊奇.
You should hand in the exercise book.
你应该交作业本儿了.
This should be no problem.
这应该没问题.
Shall we go now.
我们现在可以走了吗?
Why should I meet him?
为什么我要见他?
have to,不得不,必须,表示客观条件只能如此, 而must 则表示主观思想必须.
I have to go now.
我现在得走了.
I have to cook for my child.
我得给孩子做饭.
You must be here on time next time.
你下次一定要按时来.
We must go to get the timetable ourselves.
我们一定要自己去拿时刻表.我把所有的都给你了,希望能对你有帮助
为您推荐：
其他类似问题
must是必须,加动词原形,意思最为强烈should是应该,用法同上,意思稍弱might和may区分,后者意思上更为强烈,加动词原形need最麻烦,分两种,一种是情态动词,加动词原型,一种是动词,加to do(不定式)的形式,后者有时态.
情态动词有四类：
①只做情态动词：must,can(could),may(might),ought to
②可做情态动词又可做实义动词：need,dare
③可做情态动词又可做助动词：shall(should),will(would)
④具有情态动词特征：have(had) to,used to
扫描下载二维码正确教育旗下网站
题号：61843试题类型：单选题 知识点：情态动词,一般过去时&&更新日期：
Jenny doesn’t agree with her father, but she ________ that to his face.A.dare not to sayB.doesn’t dare to sayC.dares not sayD.dare not saying
难易度：中等
必须在注册登录后，才可以查看解析!
橡皮网学生APP下载
拍照搜题，秒出答案！
名校试题，天天更新，免费查看！
情态动词的概念：
情态动词表示说话人对某一动作或状态的态度。
几组词的辨析：
1、need和dare的用法：need和dare既可用作情态动词，也可用作实义动词。用作情态动词时，主要用于否定句和疑问句。用作实义动词时，可用于各种句式。 （1）用作情态动词：&如：—Need I come? 我需要来吗？&&&&&&&& —Yes, you must. 需要。 &&&&&&&& You needn′t telephone him now. 你现在不必打电话给他。&&&&&&&&&&I don′t think you need worry. 我想你不必发愁。&&&&&&&&&&She dare not go out alone at night. 她晚上不敢一个人出去。 &&&&&&&& How dare you say I′m unfair? 你竟敢说我不公平？ &&&&&&&& Not one of them dared mention this.他们谁也不敢提这件事。 （2）用作实义动词： 如：You don′t need to do it yourself. 你不必亲自做这件事。 &&&&&&& We need to tell them the news. 我们需要把这消息告诉他们。 &&&&&&& The table needs painting(to be painted.). 桌子需要油漆一下。 &&&&&&& We should dare to give our own opinion.我们要敢于提出自己的观点。 &&&&&&& He did not dare(to) look up. 他不敢抬头看。 &&&&&&& I dare day he′ll come again. 我想他会再来的。2、can和be able to：（1）情态动词can只有两种时态形式，现在式can和过去式could，而be able to有多种时态形式。 如：Mary can play the piano. She has been able to play it since she was 5. 玛丽会弹钢琴。她五岁起就会弹了。 （2）用在过去时中，could经常表示能够做某事，事实上不一定去做，而was∕were able to则表示“过去做成了某事”。在否定句中两者可通用。 如：He could swim across the English Channel. But he didn′t feel like it that day. &&&&&&& 他能游过英吉利海峡，但那天他不想游。 &&&&&&& Yesterday I was able to get home before the heavy rain. 昨天我在下大雨前赶到了家里。 3、must和have to：must表示主观意志，而have to表示由于客观因素不得不做某事。must没有过去式，除在间接引语中可用于表示过去时间，在直接引语中表示过去时间应该用had to代替。 如：I told her that she must give up smoking. 我叫她必须戒烟。 &&&&&&& We had to get everything ready that night. 我们那晚得把一切准备就绪。 4、would和used to：（1）usedto表示过去与现在或过去某时与后来的情况有不同，而would只表过去的情况。如：People used to think that the earth was flat. &过去人们认为地球是平的。（现在人们不这么认为。）&&&&&&& &She would go out for a walk in the morning when she was in the country. &&&&&&& 在乡下时，她总是在早晨去散会儿步。（可能现在仍有散步的习惯。） （2）used to可表示过去的习惯动作和经常的情况，而would只表示过去的习惯动作。 如：He used to∕would smoke while writing. 过去他写东西时常抽烟。 &&&&&&& She used to be fat. 她过去很胖。
情态动词的基本用法：1、can(could)： 1）表示能力，could主要指过去时间。 如：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）。 如：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。 如：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。 如：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。 如：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。 如：You may take what ever 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。 如：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。& 如：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）。 如：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。 如：He must be ill. He looks so pale. 他准是病了。他的脸色苍白。 如：She′s wearing a diamond necklace. She must have a lot o fmoney. 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。 如：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。 如：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） 如：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。 如：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。 如：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。 如：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。 如：You should be polite to your teachers. 你对老师应该有礼貌。 &&&&&&& You shouldn′t waste anytime. 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。 如：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。 如：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。 如：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。 如：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。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。 如：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。 如：Han Mei ought to know his telephone number. 韩梅该知道他的电话号码。 &&&&&&& There′ 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。 如：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？情态动词的其他用法：首先它是动词，而且不同于行为动词，行为动词表示的是可以通过行为来表达的动作（如写，读，跑），而情态动词只是表达的一种想法（如能，也许，敢）。用法是：情态动词+行为动词原形：句：I can read this sentence in English. 我能用英语读这句话。情态动词是一种本身有一定的词义，表示说话人的情绪，态度或语气的动词，但不能单独作谓语，只能和其他动词原形构成谓语。 如：We can be there on time tomorrow. 我们明天能按时去那儿。 &&&&&&& May I have your name? 我能知道你的名字吗？ &&&&&&& Shall we begin now? 我们现在就开始吗？ &&&&&&& You must obey the school rules. 你必须遵守校规。
情态动词知识体系：
情态动词表推测的三种句式： 1、在肯定句中一般用must(一定)，may（可能），might/could（也许，或许）。如：He must/may/might know the answer to this question? 他一定/可能/也许知道这个问题的答案。&&&&&&&&&It is cold in the room. They must have turned off the heating. 屋里很冷，他们肯定把暖气关了。 2、否定句中用can't/couldn't (不可能), may not/might not(可能不)。如：It can't/couldn't be the headmaster. He has gone to America.& 这不可能是校长，他去美国了&&&&&&& He may not/might not know the scientist. 他也许不认识那位科学家。 3、疑问句中用can/could(能……?)。如：Could he have finished the task? 他可能把任务完成了吗？&&&&&&& Can he be at home now? 他现在能在家吗？注：以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非may, can的过去式，而表示语气较为委婉或可能性较小。情态动词表推测的三种时态：1、对将来情况的推测，用“情态动词+动词原形”。如：She must/may/might/could arrive before 5.& 5:00前她一定/可能/也许到。 &&&&&&& She must/may/might/could walk miles and miles among the hills without meeting anyone.&&&&&&& 她一定/可能/也许会在山里一连走好几英里而遇不到一个人。 2、对现在或一般情况的推测，用“情态动词+be”，“情态动词+bedoing”或“情态动词+动词原形”。如：He must/may/might/could be listening to the radio now. 他一定/可能/也许正在听收音机。&&&&&&& He can't(couldn't)/may(might) not be at home at this time. 这个时候他不可能/可能不在家。&&&&&&& Mr. Bush is on time for everything. How can(could) he be late for the opening ceremony? &&&&&&& 布什先生一向准时，这次开幕式他怎么可能迟到呢？ 3、对过去情况的推测，用“情态动词+have+过去分词”。如：It must/may/might/ could have rained last night. The ground is wet. 地湿了，昨晚肯定/可能/也许下雨了。&&&&&&& The door was locked. He can(could) not/may(might) not have been at home. 门锁着，他不可能/可能不在家。&&&&&&& &&&&&&& Can/Could he have gotten the book？难道他找到书了吗？注：情态动词should/ought to表推测时，意为“想必会，理应……”但与“have+过去分词”连用时，则又可构成虚拟语气意为“本应该做某事却没做”。如：It's seven o'clock. Jack should/ought to be here at any moment. &&&&&&& 现在七点钟了，杰克理应随时到达。（推测）&&&& &&&&&&& She should/ought to have attended your birthday party, but she had to look after her mother in hospital.（虚拟）&&&&&&& 她本该出席你的生日晚会的，可是她得在医院照顾她妈妈。& &&&&&&& Tom should not/ought not to have told me your secret, but he meant no harm.（虚拟）&&&&&&& 汤姆本不该告诉我你的秘密，可是他并无恶意。
一般过去时的概念：
一般过去时表示过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为；过去主语所具备的能力和性格。
一般过去时的用法：　　
1、表示过去发生的动作或存在的状态，常与表示过去时间的副词如：yesterday，last week，two hours ago等连用。　　如：My family moved here five years ago. 我家五年前搬到了这里。　　&&&&&&&&I was born in 1973. 我生于1973年。　　2、表示过去一段时间经常或反复发生的动作。这时可与频度副词如：often，usually，always等连用。　　如：He always worked in tonight those days. 那些日子他总是工作到深夜。　　&&&&&&& I often left on business in 年我经常出差。　　注：表示“过去经常，而今不再”时，要用usedto.如：I used to read newspaper after breakfast. 我过去经常早饭后看报纸。（意指现在已不是这样）　　& The children often swam in this river. 孩子们过去经常在这条河里游泳。　　3、表示过去发生的一连串动作。　　如：He put down the heavy box, took out the keys, and opened the door. 他放下这沉重的箱子，掏出钥匙开了房门。　　注：过去发生的一连串动作，若用and，or，but等并列连词连接，则一律用过去式。　　如：They moved the chairs to the table, sat down and began to have& supper. 他们把椅子搬到桌边，坐下开始吃饭。　　4、在时间和条件状语从句中，用一般过去时表示过去将来的动作。　　如：He said that he would let me know as soon as he got the information. 他说他一得到消息就立即让我知道。　　&&&&&&& Mary told me that she would stay at home if it rained. 玛丽告诉我如果下雨她就呆在家里。
一般过去时的特别用法：
1、句型：It is time for sb. to do sth　"到……时间了"　"该……了"。例如：It is time for you to go to bed.你该睡觉了。　&&&&&&&&&&&&&It is time that sb.did sth. "时间已迟了"　"早该……了"。例如：It is time you went to bed. 你早该睡觉了。　　 2、would（had）rather sb.did sth.　表示'宁愿某人做某事'。例如：I'd rather you came tomorrow. 还是明天来吧。 3、wish, wonder, think, hope等用过去时，作试探性的询问、请求、建议等，而一般过去时表示的动作或状态都已成为过去，现已不复存在。例如：I thought you might have some. 我以为你想要一些。比较：Christine was an invalid all her life.（含义：她已不在人间。）　　 &&&&&&&&&&& Christine has been an invalid all her life.（含义：她现在还活着）　　 &&&&&&&&&&& Mrs. Darby lived in Kentucky for seven years.（含义：达比太太已不再住在肯塔基州。）　　&&&& &&&&&&&&&&& Mrs. Darby has lived in Kentucky for seven years.（含义：现在还住在肯塔基州，有可能指刚离去）注意：用过去时表示现在，表示委婉语气。 1）动词want, hope, wonder, think, intend等。例如：Did you want any thing else? 您还要些什么吗？　　　&&&&&&&&&&& I wondered if you could help me. 能不能帮我一下。 2）情态动词could, would。例如：Could you lend me your bike? 你的自行车，能借用一些吗？
相关试题推荐
扫描二维码马上下载橡皮网APP
拍照搜题，秒出答案！
名校试题，天天更新，免费查看！
接收老师发送的作业，在线答题。