专题复习10情态动词学案
【学习目标】
1. 掌握情态动词在一般疑问句中的问与答。
2. 掌握情态动词表示猜测的用法。
【重点难点】
情态动词can, may, must, ought to , will, shall, should, would , need, dare的用法
【知识铺垫】
情态动词表示说话人对某一动作或状态的态度,或表示主观设想。情态动词有自己的词义,但不能单独作谓语,必须和不带to的动词不定式(ought除外)连用,没有人称和数的变化。常用的情态动词有can, may, must, ought to , will, shall, should, would , need, dare。www.21-cn-jy.com
【课堂探究】
探究1 must和have to两者都表示“必须”的意思,但must含有说话人主观上的看法、态度；have to则表示客观上的需要。2·1·c·n·j·y
【针对练习】When traffic lights are red. We _________stop and wait.
A. may B. can C. must D. might.
探究2 can和could 两者都可用来表能力, 意为“能够,会”；可用来表示许可(常用在口语中)或表示怀疑、惊异、不相信等态度(常用于否定句、疑问句或感叹句中)。
【针对练习】－Could I borrow your dictionary? －Of course you ____________.
A. can B. must C. should D. will
探究3 shall用于第一、三人称疑问句表示征求对方意见；用于第二、三人称肯定句或否定句表示说话人给予对方的“禁止、命令、警告、允诺或威胁等”。
should用来表示建议、责任、义务时,可译为“应该,应当”,此时可用ought to替换；可用来表示惊讶、忧虑、赞叹等不满情绪(用在疑问句中)；还用来委婉地陈述自己的意见。www-2-1-cnjy-com
【针对练习】Schools _________allow students at least one hour a day for sports.
A. would B. might C. should D. could
探究4 had better和would rather “had better+动词原形”意为“最好做……”,否定句式为had better not。“would rather+动词原形”意为“宁可,宁愿”,否定句式为would rather not。21*cnjy*com
【针对练习】1. —Bob, may I ______your MP4?
—Sure. But you’d better not _____it to others.
A. lend；lend B lend；borrow C. borrow；borrow D. borrow；lend
2. —What about playing football this afternoon, Sam?【来源：21·世纪·教育·网】
—I would rather ______ at home than football. It’s too hot outside.
A. stay; playing B. stay; play C. to stay; to play D. to stay; playing
探究 5 “used to+动词原形”表示“过去常常做某事”或表示过去的一种惯常状态。
【针对练习】He used to _______ in the sun, but now he is used to at night.
A. read, read B. reading, read C. read, reading D. reading, reading
探究6 need和dare
【针对练习】?You ________do it if you really don’t want to. 21cnjy.com
A. needn’t B. mustn’t C. can’t D. couldn’t
【达标练习】单项选择。
1.— ______ I fill in the check-in form right now, sir?21世纪教育网版权所有
— No, you needn’t. You can complete it this afternoon. 21·世纪*教育网
A. May? B. Can? C. Would?? D. Must
2. —Could I go to the movie this weekend, Dad?
—Yes, you_______. But you have to come back before nine.2-1-c-n-j-y
A. shall B. must C. need D. can
3. You play with fire, Tom. It’s dangerous. 【版权所有：21教育】
A. needn’t B. may not C. mustn’t D. wouldn’t
4. As we know, fish _______die out of?water.
? ?A. may?? B. is going to? C. can? D. will
5. — Shall I book some seats for the concert? —_________. I’ve already done that.
A. Yes, you may B. No, you mustn’t C. No, you needn’t D. I’d rather not
6. —I think Miss Gao must be in the library. She said she would go there.
— No, she ________ be there. I’ve just seen her there. 【来源：21cnj*y.co*m】
A. can’t B. mustn’t C. needn’t D. wouldn’t
7. You ______ worry about him. He will get well soon. 【出处：21教育名师】
A. needn’t B. can’t C. mustn’t D. may not
8. Schools _____allow students at least one hour a day for sports.
A. would B. might C. should D. could
9. You _______ open the door before the train gets into the station.
A. don’t have to B. mustn’t C. needn’t D. may not
10. —I was told to be here before eight.
—Oh, you . I’m sorry for not telling you that we have changed the plan.
A. must B. can’t C. may D. needn’t
11. —May I take this book out of the reading room? — . Please read it here.
A. Certainly B. No, you needn’t C. No, you mustn’t
12. —Who’s that woman with Ann? —I’m not sure. It be her mother
A. may B. can C. will D. must
13. —Must I get up early tomorrow? —No, ________. 21教育网
A. you mustn’t B. I don’t think you have to C. you can’t D. you need
14. —The room is so dirty. ________ we clean it? —Of course.
A. Will B. Would C. Do D. Shall
15. You look tired. You’d better _______a good sleep. 21·cn·jy·com
A. have B. having C. had D. to have
【学后反思】
____________________________________________________________________
参考答案：1－5 DDCAC 6－10 AACBD 11－15 CABDA
专题复习10情态动词当堂达标题
I.用方框内的情态动词填空。（每词只用一次）
need, can, can’t, shall, shouldn’t, may, must, mustn’t, have to, would
1. —?? ?? I show him the way?
—No，you needn’t.
2.— Can you answer this question in French?
—No, I ? ??.
3. —May I keep the book for three weeks?
—No, you?? ??.
4. Nobody?? ?? live without air or water.
5. You?? ?? not worry. Everything will be all right.
6. —?? ?? I have some chocolates now??? —No, you mustn’t.
7. Children? ?? be left alone.
8. I? ?? finish my homework before I go to bed.www.21-cn-jy.com
9. ? ?? we go out for a walk? That’s a good idea.
10.?? ?? you like some fish?
II. 单项选择。
( )1. I ______ follow you. Would you please repeat it?
A. can’t B. mustn’t C. needn’t D. shouldn’t
( )2.—Must I hand in my homework now, Mr. Smith?
—No, you _______.
A. can’t B. shouldn’t C. wouldn’t D. needn’t
( )3. —Excuse me, may I keep the book a little longer?
—Sorry. You ________ return it today.
A. must B. mustn’t C. can D. can’t
( )4. —Is the long-haired man Bruce?
—No, it _______ be him. He’s in New York now.
A. can’t B. mustn’t C. needn’t D. may not
( )5. People _______ wait until the traffic becomes green. That’s the traffic rule.21世纪教育网版权所有
A. must B. can C. need D. may
( )6.— ______ I fill in the check-in form right now, sir?
— No, you needn’t. You can complete it this afternoon.
A. May? B. Can? C. Would?? D. Must
( )7. —Could I go to the movie this weekend, Dad?21教育网
—Yes, you_______. But you have to come back before nine.
A. shall B. must C. need D. can
( )8. You play with fire, Tom. It’s dangerous.
A. needn’t B. may not C. mustn’t D. wouldn’t
( )9. As we know, fish _______die out of?water. 21cnjy.com
A. may?? B. is going to? C. can? D. will
( )10. — Shall I book some seats for the concert? 2·1·c·n·j·y
—_________. I’ve already done that.
A. Yes, you may B. No, you mustn’t
C. No, you needn’t D. I’d rather not
( )11. —I think Miss Gao must be in the library. She said she would go there.
— No, she ________ be there. I’ve just seen her there.
A. can’t B. mustn’t C. needn’t D. wouldn’t
( )12. You ______ worry about him. He will get well soon.
A. needn’t B. can’t C. mustn’t D. may not
( )13. Schools _____allow students at least one hour a day for sports.
A. would B. might C. should D. could
( )14. You _______ open the door before the train gets into the station.
A. don’t have to B. mustn’t
C. needn’t D. may not
( )15. —I was told to be here before eight.
—Oh, you . I’m sorry for not telling you that we have changed the plan.21·cn·jy·com
A. must B. can’t C. may D. needn’t
参考答案：
I. 1. Must 2. can’t 3. mustn’t 4. can 5. need 6. May 7. shouldn’t
8. have to 9. Shall 10. Would
II. 1—5 ADAAA 6－10 DDCAC 11－15 AACBD
课件23张PPT。专题复习10 情态动词 情态动词：又叫情态助动词，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+动词原形。情态动词有四类：
①只做情态动词：must, can (could), may (might)……
②可做情态动词又可做实义动词：need，will
③具有情态动词特征：have (had, has) to, used to，ought to
④情态动词表猜测：一肯一否三不定（must一肯，can not一否，may，might，could，三不定。）
注：mustn't代表强烈禁止 must表示主观，have to表示客观。
考点一 情态动词的分类及用法常用的有：can (could), may (might), must , shall (should), will (would), need, have (has/had) to, used to , ought to .
情态动词无人称和数的变化，情态动词后面跟的动词须用原形，否定式构成是在情态动词后面加 "not"。个别情态动词有现在式和过去式两种形式，过去式用来表达更加客气，委婉的语气，时态性不强，可用于过去，现在或将来。情态动词属非及物动词，故没有被动语态。
考点一 情态动词的分类及用法1. can/could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,过去时是could。
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.? 考点一 情态动词的分类及用法2. may/might的基本用法:⑴ 表示“许可”，用can比较口语化,过去时是might。
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。
（may not表示按规定不许可，如果用mustn’t则表示说话人不许可。）
—May I smoke here?? 我可以在这里抽烟吗？
—No, you mustn’t.?不行。（mustn’t表示明确的禁止。）考点一 情态动词的分类及用法⑵ 肯定句中表示推测，“可能”。
例：It may rain tomorrow.? 明天可能会下雨。
The news may not be true.? 这个消息可能不会是真的。
注意：如果在疑问句中表示“可能”，通常用can。
例：Can it be true?? 那会是真的吗？
Who can he be?? 他究竟是谁呢？
⑶ 【注意】：—May I/we……？
—Yes, you may./—No, you mustn’t.?考点一 情态动词的分类及用法3. 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.?
You must be here by ten o’clock.?
【注意】：表示“必须“时，must的否定式为needn’t ，或don’t have to ,而不是mustn’t。
也就是：—Must I/we do it now？
—Yes, you must .
—No, you needn’t /don’t have to .?
例：—Must I go with them??
—No, you .?
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。
考点一 情态动词的分类及用法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 has to….
You don’t have to….
Does she have to…?
have to =have got to，意思是“必须，不得不”。考点一 情态动词的分类及用法和must不同之处：must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。
I’ve got to go to a meeting.?
我得去参加一个会议。
Will he have to work deep into the night??
他将不得不工作到深夜吗？考点一 情态动词的分类及用法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 must. / No, we needn’t.??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？考点一 情态动词的分类及用法请比较以下两句话的不同意思：
You needn’t buy the coat.? 你没有必要买那件外衣。（你还没买）
You needn’t have bought the coat.? 你没有必要买这件外衣的。（而你却买了）
【注意】：—Need I/we……？
—Yes，you must ./—No, you needn’t / don’t have to .考点一 情态动词的分类及用法⑵ need用作实义动词时，有时态、人称和数的变化。
如果人作主语，一般后接带to的动词不定式。即need to do sth；
如果物作主语，一般后用need to be done 或need doing sth。
例如：I need to look up this word in the dictionary.?
My watch needs mending/to be mended.?
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?)? 考点一 情态动词的分类及用法6. shall/should的基本用法：Shall
1）表征询意见，用于第一、第三人称疑问句。
Shall I get some tea? 我给你点茶好吗？
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）
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。
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。
考点一 情态动词的分类及用法7. will/would的基本用法： 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。
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。
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。
考点一 情态动词的分类及用法would
1）表意愿
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？
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。
考点一 情态动词的分类及用法8.ought to/used to的基本用法：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。
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。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。
I usedn’t (didn’t use) to smoke. 我过去不抽烟。考点一 情态动词的分类及用法考点二 情态动词的辨析1．must和have to
两者都表示“必须”的意思，但must含有说话人主观上的看法、态度；
have to则表示客观上的需要。【考例3】When traffic lights are red. We _________stop and wait. [南京市]
A. may B. can C. must D. might 【考例1】—Must we finish giving out the posters today?
—Yes, we _______. It can’t be put off any longer. [太原市]
A. can B. may C. must C【考例2】—I didn’t pass the math test. I think I have spent too much time playing computer games recently.
—I agree. You_______ play like that any more. [河南省]
A. needn’t B. mustn’t C. may not D. wouldn’t B【考例4】一I really like playing computer games!
一I’m afraid you ________stop，for your study and your health. [宜昌市]
A. am B. will C．may D．must CD考点二 情态动词的辨析2．can和could
两者都可用来表能力，意为“能够，会”；可用来表示许可(常用在口语中)或表示怀疑、惊异、不相信等态度(常用于否定句、疑问句或感叹句中)。【考例3】—Mary ,________ you speak Chinese?
—Yes, only a little. [北京市]
A. must B. need C. may D.can 【考例1】—Could I borrow your dictionary?
—Of course you ____________.[陕西省]
A. can B. must C. should D. will A【考例2】—Listen! Is Tom singing in the classroom?
—No. It ________be Tom. He has gone to Paris. [长沙市]
A. may not B. needn’t C. can’t CD考点二 情态动词的辨析 shall用于第一、三人称疑问句表示征求对方意见；用于第二、三人称肯定句或否定句表示说话人给予对方的“禁止、命令、警告、允诺或威胁等”。
should用来表示建议、责任、义务时，可译为“应该，应当”，此时可用ought to替换；可用来表示惊讶、忧虑、赞叹等不满情绪(用在疑问句中)；还可用来委婉地陈述自己的意见。3．shall和shouldSchools _________allow students at least one hour a day for sports. [安徽省]
A. would B. might C. should D. couldC 考点二 情态动词的辨析【考例2】—What about playing football this afternoon, Sam?
—I would rather ______ at home than football. It’s too hot outside. [南京]
A. stay; playing B. stay; play C. to stay; to play D. to stay; playing4．had better和would rather
“had better+动词原形”意为“最好做……”，否定句式为had better not。
“would rather+动词原形”意为“宁可，宁愿”，否定句式为would rather not。【考例1】—Bob，may I your MP4?
一Sure．But you’d better not _________it to others．[福州市]
A. end；lend B lend；borrow C. borrow；borrow D. borrow；lendDB考点三 情态动词表推测的用法对现在或将来的推测用“情态动词+动词原形”。肯定的推测一般用must，should，may (might)或can(could)，其中，
must的语气最强。意为“肯定”、“准是”、“想必是”；
should的语气次之，意为“很可能”、“应该”，指按常理推测；
may(migt)，can(could)的语气最弱，意为“有时会”、“也许”、“可能”。
否定推测分为两种情况：
语气不很肯定时，常用may／might／could not，意为“可能不”、“也许不”；
否定语气较强时，则用can’t，意为“根本不可能”、“一定不能”，表示惊异、怀疑的感彩。【考例1】You ________be tired after working for eight hours without a rest. [广东省]
A. can B. may C. must D. need 【考例2】—Look at the boy running on the ground．Is it Davis?
—It ____be him．I saw him go to the teacher’s office just now．[黄冈市]
A. must B. can’t C. could D. might CB考点三 情态动词表推测的用法专题复习10情态动词教案
【教学目标】
1. 要求学生能说出情态动词的分类及用法，掌握情态动词在一般疑问句中的问与答，会熟练做题。
2. 要求学生能进行情态动词的辨析，掌握情态动词表示猜测的用法，并熟练做题。
【教学重点难点】
情态动词can, may, must, ought to , will, shall, should, would , need, dare的用法
【知识梳理】
考点一：情态动词的分类及用法
1. can/could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,过去时是could。
例：He can speak English. = He is able to speak English.? 2·1·c·n·j·y
—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.? 2-1-c-n-j-y
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.?
2. may/might的基本用法:
⑴ 表示“许可”，用can比较口语化,过去时是might。
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。
（may not表示按规定不许可，如果用mustn’t则表示说话人不许可。）
—May I smoke here?? 我可以在这里抽烟吗？
—No, you mustn’t.?不行。（mustn’t表示明确的禁止。）
⑵ 肯定句中表示推测，“可能”。
例：It may rain tomorrow.? 明天可能会下雨。
The news may not be true.? 这个消息可能不会是真的。
注意：如果在疑问句中表示“可能”，通常用can。
例：Can it be true?? 那会是真的吗？
Who can he be?? 他究竟是谁呢？
⑶ 【注意】：—May I/we……？
—Yes, you may./—No, you mustn’t.?
3. 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.?
You must be here by ten o’clock.?
【注意】：表示“必须“时，must的否定式为needn’t，或don’t have to, 而不是mustn’t。
也就是：—Must I/we do it now？
—Yes, you must .
—No, you needn’t /don’t have to .?
例：—Must I go with them??
—No, you needn’t.?
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。
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，要视主语不同而变化。
例：I / You / We / They have to….
He / She / It has to….
You don’t have to….
Does she have to…?
have to =have got to，意思是“必须，不得不”。
和must不同之处：must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。
I’ve got to go to a meeting.? 我得去参加一个会议。
Will he have to work 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 must. / No, we needn’t.??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：
You needn’t buy the coat.? 你没有必要买那件外衣。（你还没买）
You needn’t have bought the coat.? 你没有必要买这件外衣的。（而你却买了）
【注意】：—Need I/we……？
—Yes，you must ./—No, you needn’t / don’t have to.
⑵ need用作实义动词时，有时态、人称和数的变化。
如果人作主语，一般后接带to的动词不定式。即need to do sth；
如果物作主语，一般后用need to be done 或need doing sth。
例如：I need to look up this word in the dictionary.? 21世纪教育网版权所有
My watch needs mending/to be mended.? 我的手表需要修理了。
We don’t need to work today.? (= We needn’t work today.)? 21cnjy.com
Does he need to go right now?? (= Need he go right now?)? 【来源：21·世纪·教育·网】
6. shall的基本用法：
1）表征询意见，用于第一、第三人称疑问句。
Shall I get some tea? 我给你点茶好吗？
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）
7. will/would的基本用法：
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。
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。
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。
would
1）表意
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？
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/used to的基本用法：
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。
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。
考点二：情态动词的辨析
1．must和have to
两者都表示“必须”的意思，但must含有说话人主观上的看法、态度；have to则表示客观上的需要。21教育网
【考例1】—Must we finish giving out the posters today?www-2-1-cnjy-com
—Yes, we _______. It can’t be put off any longer. [太原]【来源：21cnj*y.co*m】
A. can B. may C. must [答案]C【出处：21教育名师】
【考例2】—I didn’t pass the math test. I think I have spent too much time playing computer games recently.【版权所有：21教育】
—I agree. You_______ play like that any more. [河南]21教育名师原创作品
A. needn’t B. mustn’t C. may not D. wouldn’t [答案]B
【考例3】When traffic lights are red. We _________stop and wait. [南京]
A. may B. can C. must D. might. [答案]C
【考例4】—I really like playing computer games!
—I’m afraid you ________stop，for your study and your health. [宜昌]
A. am B. will C．may D．must [答案]D
2．can和could
两者都可用来表能力，意为“能够，会”；可用来表示许可(常用在口语中)或表示怀疑、惊异、不相信等态度(常用于否定句、疑问句或感叹句中)。
【考例1】—Could I borrow your dictionary?
—Of course you ____________.[陕西]
A. can B. must C. should D. will [答案]A
【考例2】—Listen! Is Tom singing in the classroom?
—No. It ________be Tom. He has gone to Paris. [长沙市]21·cn·jy·com
A. may not B. needn’t C. can’t [答案]Cwww.21-cn-jy.com
【考例3】—Mary, ________ you speak Chinese? —Yes, only a little. [北京]
A. must B. need C. may D. can [答案]D
3．shall和should
shall用于第一、三人称疑问句表示征求对方意见；用于第二、三人称肯定句或否定句表示说话人给予对方的“禁止、命令、警告、允诺或威胁等”。
should用来表示建议、责任、义务时，可译为“应该，应当”，此时可用ought to替换；可用来表示惊讶、忧虑、赞叹等不满情绪(用在疑问句中)；还可用来委婉地陈述自己的意见。21·世纪*教育网
【考例】Schools _________allow students at least one hour a day for sports. [安徽]
A. would B. might C. should D. could [答案]C
4．had better和would rather
“had better+动词原形”意为“最好做……”，否定句式为had better not。“would rather+动词原形”意为“宁可，宁愿”，否定句式为would rather not。
【考例1】—Bob，may I ________your MP4?
—Sure．But you’d better not _________it to others．[福州]21*cnjy*com
A. end；lend B lend；borrow C. borrow；borrow D. borrow；lend
[答案]D
【考例2】—What about playing football this afternoon, Sam?21*cnjy*com
—I would rather ______ at home than football. It’s too hot outside. [南京]
A. stay; playing B. stay; play C. to stay; to play D. to stay; playing
[答案]：B
考点三：考查情态动词表推测的用法
对现在或将来的推测用“情态动词+动词原形”。
肯定的推测一般用must，should，may (might)或can(could)，其中，must的语气最强。意为“肯定”、“准是”、“想必是”；should的语气次之，意为“很可能”、“应该”，指按常理推测；may (might)，can(could)的语气最弱，意为“有时会”、“也许”、“可能”。否定推测分为两种情况：语气不很肯定时，常用may／might／could not，意为“可能不”、“也许不”；否定语气较强时，则用can’t，意为“根本不可能”、“一定不能”，表示惊异、怀疑的感彩。
【考例1】You ________be tired after working for eight hours without a rest. [广东]
A. can B. may C. must D. need [答案]C
【考例2】—Look at the boy running on the ground．Is it Davis?
—It ____be him．I saw him go to the teacher’s office just now．[黄冈]
A. must B. can’t C. could D. might [答案] B
【板书设计】
can/could
may/might
must
have to
分类及用法 need
shall/should
will/would
ought to/used to
情态 must和have to
动词 can和could
辨析 shall和should
had better和would rather
肯定：must>should>may/might/can/could
表示猜测用法
否定：语气不很肯定时，常用may／might／could not
语气较强时，则用can’t。
【教后反思】
