高中语法之情态动词

情态动词定义: 情态动词是一种本身有一定的词义,但要与动词原形及其被动语态一起使用，给谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可能、应该或必要等.情态动词后面加动词原形情态动词有四类：①只做情态动词：must,can(could),may(might),ought to②可做情态动词又可做实义动词：need,dare③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,has) to,used to位置:情态动词在句中放在谓语动词之前, 谓语动词前若有助动词,则在助动词之前,疑问句中, 情态动词则在主语之前。

特点：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,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。

除此之外，情态助动词还有如下词法和句法特征：1）除ought和used以外，其他情态动词后面只能接不带to的不定式。

如果我们把ought to和used to 看做是固定词组的话，那么，所有情态动词无一例外地只能接不带to的不定式。

2）情态助动词在限定动词词组总是位居第一。

3）情态助动词用于第三人称单数现在时的时候，没有词形变化，即其词尾无-s形式。

4）情态动词没有非限定形式，即没有不定式和分词形式，也没有相应的动名词。

5）情态助动词的“时”的形式并不是时间区别的主要标志。

在不少场合，情态助动词的现在时和过去时形式都可以表示现在、过去或将来时间。

6）情态助动词之间是相互排斥的，即在一个限定动词词组中只能出现一个情态助动词，但有时却可以与have和be基本助动词连用。

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）。

高中语法-情态动词一、can 能够1.表示体力或脑力方面的能力，或根据客观规律能做某事的能力。

如He can speak English.I can go there now.(1)can 表示能够时，既可指现在也可指将来。

(2)can与be able to 的区别：① 表“能力”时二者同义No one can / is able to do it.②be able to 常侧重经过努力有能力做到，有多种时态，can 侧重自身的能力，只有一般现在时和一般过去时。

③was/were able to do 表示通过努力克服困难或在一定的条件下成功地做了某事，侧重结果，相当于managed to do 或者succeeded in doing ，could仅表示自身的能力或本领，但未必成功做到。

With the help of the fireman, they were able to leave the burning house.He was able to swim across the river.In the end, we were able to rescue the workers trapped in the fire. 2.表示“许可，允许”。

在疑问句中表示请求，许可；否定句中表示“不许”，此时常与may通用；May/Can I do it?This sort of thing can’t go on.这类事情不能再继续了！3.表示推测，主要用于疑问句和否定句，表示推测、估计时，后边可根据不同情况用动词原形、进行式、完成式。

Who can he be?She can’t be waiting for you.He can’t have gone there alone.4.强调客观可能性：可做”有时候会…”，意思是平时或大部分时间不是这样子，只是偶尔发生的事情，如：Jogging can be harmful to the health.5.表惊讶、疑虑How can it be that he was late for the opening ceremony?他咋会连开幕式都迟到呢？Can it be late? 会不会晚了？构成下列句式① can not/ can never…too… 或cannot … enough “无论怎么…也不过分：越…越好；非常…”One cannot be too careful. 越认真越好。

高中英语语法系列情态动词定义：情态动词表示说话人对某一动作或状态的态度。

特点：有一定词义；不受主语人称和数的变化影响；与主要动词的原形一起构成谓语。

情态动词：can/could ; may/might; must ;need ;will/would ; shall /should ; dare / dared ;used to ; ought to etc情态动词的基本用法1. can/coulda. 表能力，could 主要指过去时间1) Two eyes can see more than one .2) The girl could read before she went to school .* be able to do 意思同can/could ,但有较多时态表达形式；在表达过去某个事件有能力干什么时，could 表虽有能力，但不一定做了；was able to 指“不但有能力，而且实际做了”。

3) He _______ escape from the fire , but he went to save the girl .( could /was able to )4) Though the fire spread quickly , everyone ________ escape . ( could /was able to )b. 表可能5) The man there can’t be Mr. Zhang . He has gone to Nanjing .6) Look ! Someone is coming ! Who can it be ?7) * The temperature can fall to – 60 °C8) * He can make mistakes sometimes though he is clever .c. 表允许9) ---Can / Could I use your pen ?--- Yes , you can ./ Sure , go ahead . ( Yes , you could 错误 )d . 表惊异，怀疑，不相信等态度（用于否定句，疑问句或感叹句中）10) Can this be an excuse for being late ?11) No , no , this can’t be true .12) How can you be so careless!2. may / mighta. 表允许13) --- May / Might I ask you for a photo of your baby ?--- Yes , please . / Certainly ./ Please don’t ./ You’d better not ./ No , you mustn’t.b. 表可能，might 语气更加不肯定14) She may be at home .15) She might come to the party , but I am not sure .c .祝愿16) May you succeed !3 . musta . 表义务，意为“必须”，主观意志；而have to 为“不得不”，客观要求。

高中英语语法系统讲解之八情态动词和虚拟语气情态动词一. 情态动词的类型和特征1. 类型○1只作情态动词用的有：can（could），may（might），must，ought to。

○2可作情态动词也作实义动词的有：need，dare。

○3可作情态动词也作助动词的有：shall（should），will（would）。

○4具有情态动词某些特征的有：have（had）to，used to。

2. 特征情态动词有一定的词义，但不能单独作谓语，须和实义动词或系动词连用，构成谓语；且适用于主语的各种人称和数（have to例外），主语是第三人称单数时，要用has to。

二. 情态动词的基本用法1. can与could○1表示能力或客观可能性，还可表示请求和允许，她存在以下几种形式：如Children can be troublesome sometimes.○2表示惊异、推测、怀疑、不相信的态度（主要用于否定句、疑问句中）。

如This can’t be done by him.○3can的习惯用法A. can but的用法can but“只好，至多不过”，如We can but do our best.B. cannot help but，cannot help的用法二者都表示“不得不；不能避免；不禁”；但前者后加动词原形，后者加代词或动名词等。

如The girl couldn’t help but live on herself.When I try to speak, I can’t help making mistakes.C. cannot … too“无论怎样……都不过分；越……越好”如We can’t thank you too much for what you have done for us。

We can not be too careful to cross the road.温馨提示：○1can与be able to：can表示有能力做某事，be able to表示通过努力、克服困难做成某事。

高中英语语法之情态动词（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)有一定词义；2）不受主语人称和数的变化影响；3)与主要动词的原形（或称不带to的不定式）一起构成谓语（除ought to作固定词组看待)。

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，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。

He could be here soon。

他很快就来。

We can’t carry the heavy box。

我们搬不动那箱子。

除此之外，情态助动词还有如下词法和句法特征：1）除ought和used以外，其他情态动词后面只能接不带to的不定式.We used to grow beautiful roses. I asked if he would come and repair my television set.2）情态助动词在限定动词词组总是位居第一： They need not have been punished so severely。

3）情态助动词用于第三人称单数现在时的时候,没有词形变化,即其词尾无—s形式：She dare not say what she thinks。

4）情态动词没有非限定形式，即没有不定式和分词形式，也没有相应的动名词：Still， she needn't have run away。

5）情态助动词的“时”的形式并不是时间区别的主要标志。

在不少场合,情态助动词的现在时和过去时形式都可以表示现在、过去或将来时间：Would you mind very much if I ask you to do something？ She told him he ought not to have done it。

高中语法解读情态动词和被动语态的区别在英语语法中，情态动词和被动语态是两个常见且重要的概念。

它们在句子结构和语义表达上有着明显的区别。

本文将详细解读情态动词和被动语态的区别，以便读者能够更好地理解和运用它们。

一、情态动词的定义和用法情态动词，即modal verbs，是帮助表达说话人的意愿、能力、推测等情态或态度的词汇。

常见的情态动词包括can, could, may, might, will, would等。

以下是情态动词的主要用法：1. 表示能力与可能性情态动词与动词原形搭配，表示某人具有或没有做某事的能力或可能性。

例如：- She can play the piano.（她会弹钢琴。

）- He might come to the party.（他可能会来参加派对。

）2. 表示推测与可能的情况情态动词可用于表示说话人对某种情况进行推测，表达可能性或不确定性。

例如：- They may be at home.（他们可能在家。

）- It could rain later.（下雨的可能性很大。

）3. 表示请求与许可情态动词还可用于表示请求或许可。

例如：- Can you lend me your pen?（你能借我你的钢笔吗？）- May I use your phone?（我可以用一下你的手机吗？）二、被动语态的定义和用法被动语态，即passive voice，是表示主动语态中的动作接受者或受事者为句子的主语，而动作执行者为句子的宾语或省略。

被动语态的结构是由助动词be和动词的过去分词构成。

下面是被动语态的主要用法：1. 强调动作的接受者被动语态常用于强调动作的接受者而非执行者。

例如：- The book was written by Mark Twain.（这本书是马克·吐温写的。

）- The cake was made by my mom.（这个蛋糕是我妈妈做的。

）2. 避免指责或隐藏动作执行者被动语态可以用于避免指责或隐藏动作的执行者。

Unit9 情态动词 I语法考点超级归纳考点一：情态动词的基本用法1. 情态动词的概念情态动词又称为情态助动词（Modal Auxiliary）。

它具有词汇意义，但意义不够完整，因此一般不能单独作谓语。

情态动词表示说话人的语气和态度。

2. 情态动词的特征情态动词具有以下五个特征：（1）情态动词后面一般接原形动词（即不带to的不定式）；（2）情态动词没有人称和数的变化；（3）情态动词与其他动词构成谓语时总是放在其他动词之前；（4）情态动词无非谓语形式，即没有不定式、动名词和分词形式；（5）情态动词只有现在式和过去式两种形式，但可以表示现在时间、过去时间和将来时间。

3. 情态动词的意义常见的情态动词如下表所示：现代英语语法还将have to, used to, had better, would rather, be going to, be about to等也都列为情态动词。

考点二：表示“能力”的情态动词考点三：表示“允许”的情态动词注：注意：as well 在口语中常与may或might连用，作“也好，也行”或“倒不如”解，用来缓和语气。

例如：You may as well go. 你去也好。

The weather was so bad that we might（just）as well have stayed at home. 天气太糟糕，早知道如此，倒不如呆在家里为好。

考点四：表示“推测”的情态动词gate just a moment ago.h.考点五：“情态动词+have+过去分词”表示“过去推测”“can/could/may/must+have+过去分词”表示对过去情况的推测hat注意：could, might表示推测时不表示时态，其推测的程度不如can, may。

考点六：表示“应该”的情态动词注：考点七：表示“意愿”的情态动词wil考点八：“情态动词+have+过去分词”表示“责备”“情态动词＋have＋过去分词”表示已经完成的动作或存在的状态，并带有感情色彩。

高中语法之情态动词情态动词本身有词义，表示说话人的某种语气或感情，主要用以表明说话者对某一行为的态度和观点，主要包括揣测、判断、需要、可能等意思。

但词义不完整，不能单独作谓语，只能和动词原形一起构成谓语。

情态动词的过去式can--could may--might shall--shouldwill-would dare--dared have to--had to情态动词的省略式shall not--shan’t will not--won’t can not--can’tmust not--mustn’t should not--shouldn’t would not--wouldn’tneed not--needn’t could not--couldn’t dare not--daren’t情态动词没有人称和数的变化。

例外的仅有have to动词原形跟后面，说话语气较委婉。

can表能力，may许可，must责任或义务。

否定回答needn’t换，需要need,dare敢。

should应该，would愿，have to被迫表客观。

情态动词的用法：一、can/colud1.表示能力；can能够，can’t不能够，表示有能力做，知道如何做或能够发生.could 表示过去的能力。

He can speak Spanish, but he can’t speak Russian.can 与be able to的区别1)can 只用于一般现在时与一般过去时两种时态中，be able to则可用于更多的时态。

表达将来的或者经过努力的能力时，一般用be able to.I’m sorry I haven’t been able to answer your letter in time.I’ll be able to speak German in another few month.(不能用I can speak...)can的将来时以be able to代之I shall be able to overtake him.2)be able to后的动词一般不用被动式，而can可以The patient can be operated on.（不用be able to）3）在过去时态中，could仅指具备某种能力，但实施的结果不明确，而was/were able to不仅说明有某种能力，而且还成功地做到了，相当于managed to do=succeeded in doing2.表示许可1）请求许可表示向对方请求许可时，can和could都可以用，而且没有时间上的差别，只是could 比can更加委婉、客气或不确定。

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

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

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

在高中英语学习中，掌握情态动词的正确用法至关重要。

本文将介绍情态动词的相关知识点，帮助高三学生更好地运用这一语法现象。

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

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

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

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

may用于表示较为肯定的推测，might和could表示推测的可能性较小。

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

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

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

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

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

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

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

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

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

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

比如：I can speak Spanish.（我会说西班牙语。

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

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

比如：It may rain tomorrow.（明天可能会下雨。

）I thought she might come.（我以为她可能会来。

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

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

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

情态动词总结I 情态动词的特征：1.本身有词义。

2.不能独立作谓语。

2. 后接动词原形一起构成谓语。

3. 不随人称和数的变化。

II 情态动词各自的基本意义及用法：1.大多数情态动词（除表‘能力、许可、意志’外），都可以表示推测，其程度有差异。

按可能性程度的高低排列为：must﹥will ﹥would ﹥ought to ﹥should完全肯定完全可能很可能﹥can ﹥could﹥may ﹥might可能有可能2. 区分情态动词的否定含义：may not或许不、可能不might not可能不can’t 不可能mustn’t不许、禁止shouldn’t不应该needn’t 不必1.情态动词表推测的反意疑问句，简单来说，就是以情态动词后的时态为淮，如句子里有明确的时间状语，则以其为准。

2.以must 为例：E.g. 1. You must be hungry now, aren’t you?2. He must be watching TV , isn’t he ?3 Tom must have lived her for a long time, hasn’t he ?4. She must have arrived yesterday, didn’t she?注：如选择题中（以She must have arrived yesterday, didn’t she？为例）既有didn’t she又有hasn’t she则以didn’t she？为最佳答案。

IV 情态动词专项练习与解析一( ) 1. You _____ return the book now. You can keep it till next week if you like.A. can’tB. mustn’tC. needn’tD. may not( ) 2. Where is my pen? I _____ it.A. might loseB. would have lostC. should have lostD. must have lost( ) 3. I wish I _____ you yesterday.A. seenB. did seeC. had seenD. were to see( ) 4. I didn’t hear the phone. I _____ asleep.A. must beB. must have beenC. should beD. should have been( ) 5. If my lawyer _____ here last Saturday, he _____ me from going.A. had been; would have preventedB. had been; would preventC. were; would preventD. were; would have prevented( ) 6. He _____ you more help, even though he was very busy.A. might have givenB. might haveC. may have givenD. may give( ) 7. If it _____ for the snow, we _____ the mountain yesterday.A. were not; could have climbedB. were not; could climbC. had not been; could have climbedD. had not been; could climb( ) 8. Without electricity human life _____ quite difficult today.A. isB. will beC. would have beenD. would be( ) 9. A computer _____ think for itself, it must be told what to do.A. can’tB. couldn’tC. may notD. might not( ) 10. Jenny _____ have kept her word. I wonder why she changed her mind.A. mustB. shouldC. needD. would( )11. We _____ last night, but we went to the concert instead.A. must have studiedB. might studyC. should have studiedD. would study( ) 12. — Could I borrow your dictionary?— Yes, of course you _____.A. mightB. willC. canD. should( ) 13. Tom ought not to _____ me your secret, but he meant no harm.A. have toldB. tellC. be tellingD. having told ( ) 14. — If he _____, he _____ that food.— Luckily he was sent to the hospital immediately.A. was warned; would not takeB. had been warned; would not have takenC. would be warned; had not takenD. would have been warned; had not taken ( ) 15. Peter _____ come with us tonig ht, but he isn’t very sure yet.A. mustB. mayC. canD. will( ) 16. I told Sally how to get here, but perhaps I _____ for her.A. had to write it outB. must have written it outC. should have written it outD. ought to write it out( ) 17. I didn’t see your sister at the meeting. If she _____, she would have met my brother.A. has comeB. did comeC. cameD. had come ( ) 18. — Shall I tell John about it?—No, you _____. I’ve told him already.A. needn’tB. wouldn’tC. mustn’tD. shouldn’t ( ) 19. When a pencil is partly in a glass of water, it looks as if it _____.A. breaksB. has brokenC. were brokenD. had been broken( ) 20. It’s nearly seven o’clock. Jack _____ be here at any moment.A. mustB. needC. shouldD. can( ) 21.— There were already five people in the car but they managed to take me as well.— It _____ a comfortable journey.A. can’t beB. shouldn’t beC. mustn’t have beenD. couldn’t have been ( ) 22. Johnny, you _____ play with the knife, you _____ hurt yourself.A. won’t; can’tB. mustn’t; mayC. shouldn’t; mustD. can’t; shouldn’t ( ) 23. The fire spread through the hotel very quickly but everyone _____ get out.A. had toB. wouldC. couldD. was able to ( ) 24. — When can I come for the photos? I need them tomorrow afternoon.— They _____ be ready by 12:00.A. canB. shouldC. mightD. need( ) 25. — I stayed at a hotel while in New York.— Oh, did you? You _____ with Barbara.A. could have stayedB. could stayC. would stayD. must have stayed ( ) 26. — Will you stay for lunch?— Sorry, _____. My brother is coming to see me.A. I mustn’tB. I can’tC. I needn’tD. I won’t( ) 27. — Are you coming to Jeff’s party?—I’m not sure. I _____ go to the concert instead.A. mustB. wouldC. shouldD. might( ) 28. — Write to me when you get home.— _____.A. I mustB. I shouldC. I willD. I can( ) 29. I was really anxious about you, you _____ home without a word.A. mustn’t leaveB. shouldn’t have leftC. couldn’t have leftD. needn’t leave( ) 30. — Is John coming by train?— He should, but he _____ not. He likes driving his car.A. mustB. canC. needD. may专项练习（二）1. I didn’t see her in the meeting room this morning. She _____ at the meeting.A. mustn’t have spokenB. shouldn’t have spokenC. needn’t have spokenD. couldn’t have spoken2. One ought _____ for what one hasn’t done.A. not to be punishedB. to not be punishedC. to not punishedD. not be punished3. If you really want yourself to be in good health, you must ___ always ___ so much.A. not; be smokingB. not; have smokedC. not; to smokeD. be not; smoking4. With so much work on hand, you _____ to see the game last night.A. mustn’t goB. shouldn’t goC. couldn’t have goneD. shouldn’t have gone5. Most of the students felt rather disappointed at the English party. They say that it ______ better organized.A. had beenB. had to beC. must have beenD. could have been6. I’m surprised that he _____ in the exam.A. should failB. would have failedC. may have failedD. should have failed7. The little girl _____ there alone.A. not dare goB. dares not goC. dare not goD. dare not to go8. “Must we do it now?” “No, you _____.”A. won’tB. needn’tC. can’tD. don’t9. He said he would rather not _____ it right now.A. doingB. to doC. doD. to be doing10. You _____ to the meeting this afternoon if you have something important to do.A. needn’t to comeB. don’t need comeC. don’t need comingD. needn’t come11. Put on more clothes. You _____ be feeling cold with only a shirt on.A. canB. couldC. wouldD. must12. I _____ play football than baseball.A. would ratherB. had betterC. like betterD. prefer13. I thought you _____ like something to read, so I have brought you some books.A. mayB. mightC. couldD. must14. There was plenty of times. She _____.A. mustn’t have hurriedB. couldn’t have hurriedC. must not hurryD. needn’t have hurried15. The plant is dead. I _____ it more water.A. will giveB. would have givenC. must giveD. should have given16. You _____ return the book now. You can keep it till next week if you like.A. can’tB. mustn’tC. needn’tD. may not17. It’s still early, you _____.A. mustn’t hurryB. wouldn’t hurryC. may not hurryD. don’t have to hurry18. Please open the window, _____?A. can’t youB. aren’t youC. do youD. will you19. We _____ for her because she never came.A. mustn’t have waitedB. shouldn’t have waitedC. mustn’t waitD. needn’t wait20. — May I stop here? — No, you _____.A. mustn’tB. might notC. needn’tD. won’t21. It’s a fine day. Let’s go fishing, _____.A. won’t weB. will weC. don’t weD. shall we22. I didn’t see her in the meeting room this morning. She _____ at the meeting.A. mustn’t have spokenB. shouldn’t have spokenC. needn’t have spokenD. couldn’t have spoken23. — Please don’t make a noise. — _____. I’ll be as quiet as a mouse.A. Yes, I won’tB. No, I won’tC. No, I willD. Yes, I will24. The young man has made so much noise that he _____ not have been allowed to attend the concert.A. couldB. mustC. wouldD. should25. — Where is John? — He _____ in the library.A. should beB. must beC. can beD. must have been26. Since the road is wet this morning, _____ last night.A. it must rainB. it must be rainingC. it must have rainedD. it must have been rain27. — Will your brother stay home tonight?— I’m not quite sure. He _____ to the cinema tonight.A. must goB. can goC. may goD. may be going28. She’s already two hours late. What ______ to her?A. can have happenedB. may have happenedC. should have happenedD. must happen29. You must be a writer, _____?A. mustn’t youB. are youC. must youD. aren’t you30. I got up early that morning, but I _____ so because I had no work to do.A. mustn’t have doneB. didn’t need to doC. needn’t have doneD. can’t have done31. He _____ have come here yesterday, but he didn’t.A. couldB. shouldC. ought toD. all the above32. I missed the last bus, so I _____ go home on foot.A. mustB. have toC. mayD. had to33. He ought to win the first prize, _____ he?A. oughtn’tB. shouldn’tC. mustn’tD. both A and B34. Everyone _____ do his best for the modernizations of our country.A. canB. mayC. shouldD. might35. Let’s clean our classroom, _____?A. will youB. don’t weC. shall weD. do you36. Let us play basketball, ______?A. will youB. don’t weC. shall weD. do you37. He asked me for this book many times. Please tell him that he _____ have it tomorrow.A. mustB. mayC. shallD. both B and C38. “Your phone number again? I _____ quite catch it.” “It’s 9568442.”A. didn’tB. couldn’tC. don’tD. can’t39. Mother _____ us stories when we were children.A. was used to tellB. is used to tellingC. used to tellD. used to telling40. She would rather _____ more money on books _____ on clothes.A. cos t … notB. to spare … don’tC. pay … thanD. spend … than专项练习（三）1. — Has Li Lin started? He said he would join in the party.— He ______. He is a man of keeping his word.A. could have leftB. must have leftC. can’t comeD. won’t be c oming2. — May I park my car here?— No, you ______. No car is allowed to park here.A. may notB. needn’tC. mustn’tD. daren’t3. — Excuse me, could you tell me where the Yajia Supermarket is?—It’s two blocks straight ahead. You ______ miss it.A. mustn’tB. can’tC. needn’tD. shouldn’t4. — I saw Mr. Sun at Tongyu Station this morning.—You ______. He’s still on holiday in Hawaii.A. couldn’t haveB. mustn’t haveC. shouldn’tD. needn’t5. — How about paying a visit to Dr. Wang, our former Chinese teacher?— Good idea. I will e-mail him today so that he ______ know ______ to expect us.A. shall; whyB. could; whenC. would; whatD. will; how6. Everything has two sides. Beautiful songs, sometimes, ______ be just noise to others.A. mustB. mayC. shouldD. could7. Someone ______ my umbrella. I found it wet yesterday.A. must be usingB. must have usedC. must useD. must have been using8. — How dangerous it was!— Yes, but for the passer-by’s quick action, th e girl ______.A. was drownedB. could have been drownedC. had drownedD. should be drowned9. You ______ scold such a pupil who always keeps silent so seriously that you ______ hurt him.A. should; canB. may; willC. mustn’t; mayD. can’t; must10. — Why does Alice know so much about Angkor Wat?— She ______ have been there, or ...A. mustB. oughtn’t toC. mayD. can’t11. —You may laugh, but I’ve been thinking of becoming a vegetarian.— Oh, you ______ be crazy. You will be hungry all the time.A. mustB. mayC. willD. need12. —What’s the matter with you?—Oh, I’m not feeling well in the stomach. I ______ so much fried fish just now.A. shouldn’t eatB. mustn’t have eatenC. shouldn’t have eatenD. mus tn’t eat13. — ______ he have been chosen as captain of the football team?— Yes, he ______.A. Can; must haveB. Must; must haveC. Can; mustD. Must; must14. Mr. Zhang ______ in Shanghai tomorrow morning.A. can have arrivedB. will have arrivedC. may have arrivedD. must have arrived15. Miss Wang started at 8 o’clock, and she ______ be there now.A. shouldB. canC. can’tD. need16. — It must be Mr. Li who did it. — No, it ______ be Mr. Li.A. mustn’tB. wouldn’tC. can’tD. may17. You ______ finish reading the book as soon as possible.A. mayB. canC. needD. should18. — Need you go to work now? — Yes, I ______.A. mustB. needC. canD. dare19. Your trousers are dirty. ______ them for you?A. Shall I washB. Will I washC. Am I going to washD. Am I washing情态动词专项练习与解析一【练习解析】1．C 从原题中You can keep it till next week if you like这一信息句可知，“你不必现在还”。

高中英语知识点归纳情态动词与情态副词的区别与用法情态动词和情态副词是英语语法中的两个重要概念，尽管它们在形式上相似，但在用法和含义上有一些区别。

本文将详细介绍情态动词和情态副词的区别和用法。

一、情态动词的定义和用法情态动词是一类特殊的助动词，用于表示说话人的态度、情感或推测。

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

1. 表示能力和才能：- Can：表示能力、许可或请求，用于肯定句和疑问句中。

- He can swim.（他会游泳。

）- Can I borrow your pen?（我能借用你的笔吗？）- Could：过去式，表示过去的能力或请求。

- I could run faster when I was young.（我小时候跑得更快。

）- Could you open the window, please?（请你开下窗户好吗？）2. 表示推测和建议：- May：表示可能性、允许性或请求。

- It may rain tomorrow.（明天可能会下雨。

）- May I use your phone?（我可以用一下你的手机吗？）- Might：表示较小的可能性或社交礼貌。

- He might be at home.（他可能在家。

）- Might I have a glass of water, please?（我可以请你倒杯水吗？）3. 表示义务和建议：- Shall：主要用于疑问句或表示请求或建议。

- Shall we go now?（我们现在走吗？）- You shall do your homework.（你必须完成作业。

）- Should：表示应该、建议或责任。

- You should apologize.（你应该道歉。

）- She should study harder.（她应该更加努力学习。

）4. 表示必须和命令：- Must：表示必须、必要或断定。

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

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

I can climb this pole.我能爬这根杆子。

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

Fir e can’t destroy gold.火烧不毁金子。

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

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

2)表可能性多用于否定与疑问结构中，但也可用在肯定句中。

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

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

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

may 在肯定句中表示现实的可能性。

The road may be blocked.这条路可能不通了。

3)表示允许（和 may 意思相近）常见于口语。

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

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

高中英语知识点归纳情态动词的用法和辨析情态动词是英语中的一类特殊动词，它们用来表示说话者对某种行为、能力、必要性等方面的态度或推测。

情态动词包括can, could, may, might, must, shall, should, will, would等。

它们在句子中有一定的用法和辨析。

一、can与could1. 表示能力与可能can用于一般现在时和一般未来时，表示肯定的能力或可能性；e.g. He can swim.（他会游泳。

）I can solve this problem.（我能解决这个问题。

）could则用于过去时，表示过去某一时间的能力或可能性。

e.g. When I was young, I could run very fast.（当我年轻的时候，我跑得很快。

）2. 请求与许可can用于一般现在时，表示请求或征询许可；e.g. Can I borrow your pen?（我可以借用你的笔吗？）Could则更加委婉，用于礼貌地请求或征询许可。

e.g. Could you please help me with the homework?（你能帮我做作业吗？）二、may与mightmay用于一般现在时和一般未来时，表示较正式的许可或征求对方意见。

e.g. May I use your phone?（我可以用你的电话吗？）might则表示过去或将来的一种可能性，常用于虚拟语气中。

e.g. If it rains tomorrow, we might stay at home.（如果明天下雨，我们可能会呆在家里。

）三、must1. 表示推测或推理must用于一般现在时和一般过去时，表示根据已有的客观事实或推理得出的合理推测。

e.g. He has been studying hard, so he must pass the exam.（他一直在努力学习，所以他一定会通过考试。

）2. 表示义务或必要性must用于一般现在时和一般过去时，表示说话者的主观认识或认为事物具有必然性或必要性。

专题五情态动词一、can和could1、can的用法（1）表示体力和脑力方面的能力。

（2）表示对现在的动作或状态进行主观的猜测，主要用在否定句和疑问句中。

（3）表示可能性，理论上的可能性，意为“有时候可能会”，可用于肯定句。

（4）表示允许，意思与may接近。

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

（6）can的特殊句型cannot…too / enough表示“无论怎么。

也不过分”。

“越。

越好”。

cannot but+ do sth.表示“不得不，只好”。

2、could的用法（1）表示能力，指的是过去时间。

（2）表示允许，指的是过去时间。

（3）表示可能，可以指过去时间，也可以指现在时间，表示语气缓和。

（4）委婉客气地提出问题或陈述看法，指的是现在时间。

主要用于疑问句，回答时用can。

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

couldn’t的可能性比can’t小。

4、can与be able to的区别（1）现在时：无区别，但后者不常用。

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

（3）将来时：can没有将来时，要用will be able to。

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

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

（2）表示一件事或许会发生或某种情况可能会存在，通常用在肯定句和否定句中。

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

2、might的用法（1）表示询问或允许，指的是过去时间。

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

3、may与might的特殊用法（1）“may+主语+动词原形”表示祝愿。

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

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

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

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

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

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

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

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

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

1 比较can 和be able to1）can/could 表示能力；可能（过去时用could）, 只用于现在式和过去式（could）。

be able to可以用于各种时态。

例如：They will be able to tell you the news soon. 他很快就能告诉你消息了。

表示成功地做了某事时，用was/were able to，不能用could。

例如：He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out.2）提出委婉的请求，（注意在回答中不可用could）。

例如：--- Could I have the television on? 我能看电视吗？--- Yes, you can. / No, you can\‘t. 可以/不可以。

3）在否定句、疑问句中表示推测或怀疑。

例如：He couldn\’t be a bad man. 他不大可能是坏人。

Could he help us ?The girl couldn’t have stolen your electronic dictionary .•4）有时会，he can be difficult to get along with , even though he is good 5）否定推测用can\'t。

例如：If Tom didn\'t leave here until five o\'clock, he can\'t be home yet.如果汤姆五点才离开这儿，他此时一定还未到家。

2 比较may和might1）表示允许或请求；表示没有把握的推测；may 放在句首，表示祝愿。

例如：May God bless you! 愿上帝保佑你！He might be at home. 他可能在家。

高中英语情态动词详细讲解及例句-CAL-FENGHAI.-(YICAI)-Company One1一、情态动词无人称和数的变化，不能单独做谓语，只能和行为动词或状态动词构成谓语二、情态动词分为：情态助动词：can(could)、may(might)、must、have to (hadto )、ought to 、shall(should)、will(would) 12个半情态助动词：dare、need、used to、had better、would better(5个)三、情态助动词1.can and could1)ability：be able to do /manage to do/succeed in doing sth.eg.The army can defeat their enemy.eg.The army is able to defeat their enemy.eg.The army succeed in defeating their enemy.2)permission:eg.Can I smoke here?eg.You can’t smoke here.3)possibility:用在否定句、疑问句、感叹句中-eg.This can’t be done by him.当被用在肯定句中时，表达的是理论上的可能性，不涉及是否真的会发生eg.even expert drives can make mistakes.要表达现在或者将来的可能性，用may /might或could.eg.I may leave for Beijing next month.但在特殊疑问句中，或与副词hardly、only等连用的陈述句中表达可能性只用can/couldEg.where can the noise be coming from?eg.It can hardly be the postman,he comes only in the morning.4)有时会：the road can be blocked.5)could 表示轻微的怀疑或委婉的看法I’m sorry I couldn’t lend you the book now.His story could be true,but I hardly think it is.6)could 表示委婉的请求，主要用于疑问句，不用于肯定句Could you lend me some money?Yes,I can /No,I am afraid not.7)could 的常用结构：could+动词+比较级“非常，再.....不过了”It couldn’t be better.Couldn’t +过去分词+比较级“非常，再.....不过了”They couldn’t have tried harder to make me eel welcome.Can’t..too..=can never too“无论怎样...也不为过,越...越好”I can’t thank you too much.I owe my progress to you.Can’t (help/choose) but do/can but +动词原形“不得不，只好”We can but agree with him.Can’t help doing 忍不住，不得不I can’t help laughingCan’t be (it) 控制不住，没有办法It can’t be helpedCan’t....without 没有...就不能One can’t succeed without perseverance.2.may and might1)permission:May I use your pen?Yes,you may./No,you may not.2)Possibility:用于推测，表示不确定,不用于疑问句中She may know Tom’s address.出现I’m afraid.I’m not sure等表示不确定时，常用may/might.I’m afraid he might not come to attend the meeting today.从语气上判断，may表示的可能性比might 大，might更多的表示怀疑He may be very busy now.He might be very busy now.3)用于让步状语从句中However hard you may study,you cannot master English in a month.4)用于祈使句，表示祝愿May you succeed!5)might 常用于表示轻微的责备和委婉的请求You might post the letter for me if you are going near a post box.You might have let me know before!6)习惯用法：may as well do”理所当然，有足够的理由”She may be proud of her sonMay /might (just) as well do=had better do(最好)You might as well stay at home tonight.May/might as well+do A+as+do+B”与其做B不如做A”You might as well throw the money away as lend it to him.One may as well not know a thing at all as know it but imperfectly3.must and have to1)表示义务，一定要，必须You must arrive in good time.The meeting is very important.2)表示肯定性或难以避免，必然会，肯定会All men must die.3)must 表示有把握的推测，一定是，准时Must do/must be doing/must have doneThe tall fellow must be a basketball player.Let’s have something.You must be starving.He must have received mu letter which has mailed last week.4)must 表示非要，偏要，常以第二人称为主语，意指不耐或令人不愉快的事情，用于其他人称，表示主语固执，意为偏偏Why must you buy that car?Jane was never a pleasant young girl.After you gave her your advice,she must goand do the opposite.5）must 的三种否定形式表示不可能 must be --can’t be must have done--can’t have doneYou must have met him before.You can’t have met him before.表示不必 must do--need not to/don’t have toWe must get up at six tomorrow morning.We don’t have to get up at six tomorrow morning.表示决不能，严禁 must--mustn’tYou mustn’t park your car here.6)回答以must提问的句子Must we clean all the rooms?Yes ,you must/No ,you don’t have to/No ,you needn’t7)must 可做名词，表示必须有的东西，必须做的事Warm clothes are a must in the mountains.8)must和have to 表示必须时，有一下差别Must 表示的是说话人主观的看法，而have to则往往强调客观需要The play is not interesting ,I really must go now.I have to work when I was your age.Must 一般只表现在，have to 则有更多的时态。