专题九情态动词can和would
一、情态动词：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。情态动词后面加动词原形。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"。
二、can，表示能会，后面接动词原形，
如：I can sing. 我会唱歌。She can dance. 她能跳舞。
（1）有关can的句型：
a.肯定句：主语+can+动词原型
1.Lingling can ride a horse. 玲玲会骑马。
2.He can speak Chinese.他会说中文。
3.My father can play table tennis.我的爸爸会打乒乓球。
b.否定句：主语+can+not+动词原形
1. Lingling can’t ride a horse.
2.
3.
c.一般疑问句及回答：Can+主语+动词原形
1.Can Lingling ride a horse? Yes,she can.
2.
3.
d.特殊疑问句：特殊疑问词+can+主语+动词原形
1. What can you do? 你会做什么？
2. How many birds can you see? 你能看见多少只鸟？
3. Who can help me? 谁能帮助我？
你还能造出有关can的特殊疑问句吗？
练习：1、Can you play ____piano? A、a B、an C、the
2、Can you dance? yes, I ____. A、do B、can C、can’t
3、Can he Write English? No,he ____ A、can B、can’t C、does
4、I __ ride a bike ,but I ____drive a car. A、can , can B、can’t , can’t C、can, can’t
5、She can _____basketball . A、play B、playing C、plays
三、would是一个情态动词，意思是“愿意”，其后接动词原形；
eg: I would stay at home.我愿意呆在家里。
（1）变否定句时在would 后加not ，would not 缩写为wouldn’t
（2）变一般疑问句时及回答
四、would like 意为“想要，愿意”，相当于want ，但比want 语气委婉。
① would like sth. 想要某物
I would like some tea.
我想要些茶。
一般有以下三种结构形式
② would like to do sth. 想要干某事
I would like to go with you. 我想和你一起去。
③ would like sb. to do sth. 想要某人干某事
I would like you to meet my parents. 我想要你见见我的父母。 ※would like 中的would 在句中常与前面的主语缩写为’d.
eg: I’d=I would you’d=you would He’d=He would
※相关句型
（1）Would you like to do sth?“你愿意干某事吗？”这是日常生活中用来向对方有礼貌地提出建议或邀请的句型。
如果是同意，一般说Yes, I’d like/love to; 但是，如果是拒绝，我们也要说客气些，比如可以先说 “sorry”,再说明原因。 eg: -Would you like to play games? 你愿意做游戏吗？
-Yes, I’d love to. 是的，我愿意。
-Sorry, I have to do my homework. 对不起，我必须做作业。
（2）Let’s …一般可以用于提出建议，也可以用来表示邀请。如：
-Let’s stay at home and watch TV .我们在家里看电视吧。
-OK./ All right./ A good idea. 好。/ 好吧。/ 好主意。
（3）Would you like sth?意为“你想要某东西吗？”这也是日常生活中有礼貌地、语气很委婉地征求对方要求时的用语。
其肯定回答是:Yes, please./All right./Ok.等；
否定回答是:No, thanks.
eg: -Would you like some rice?你想要些米饭吗？
-Yes, please.请来一些。 -No, thanks.不，谢谢。
练习：1. ——Would you like some more? —______. I’m full.
A. Yes, please
B. I’d love to
C. No, I won’t
D. No, thanks
2. ——Would you like to go to the concert with me?
—I’d love to, ________ I can’t. I have a lot of homework to do.
A. or
B. but
C. so
D. and
3. I would like a cup of tea. （找出与画线部分意思相近的词）
A. want
B. will
C. carry
D. bring
4. ——Would you like some potatoes? —________.
A. I have eaten so much. Thank you.
B. Yes, just a few
C. I don’t know
D. I don’t
5. ——Don’t forget to come to my birthday party.—_______.
A. I don’t
B. I won’t
C. I ca n’t
D. I haven’t
按要求完成下列各题。
1. ——你想要一些橘子吗？——不，谢谢。
——______ you like ______ oranges? ——No, ______.
2. ——你想和我一起去钓鱼吗？——好的，我非常愿意。
——Would you ______ ______ go fishing with me? ——OK, ______ ______ to.
3. Do you want to go shopping with me?（变同义句）
______ you ______ to ______ shopping with me?
4. ——Would you like another cake? ——______.
A. I think
B. I’d love to do
C. No, thanks
D. I’m afraid
5. I would like some ice creams.（对画线部分提问）______ ______ you ______? 完成对话，每空一词。
A: Can I help you? B: I’d some noodles, please.
A: What of noodles would you like?
B: I’d beef, chicken and mutton noodles.
A: Then what do you want? B: I a medium bowl.
A: Would you some drinks, please? B: No，.
A: Well, you like have some dessert? B: Sure, love to. A: OK. Wait a moment, please.
专题九情态动词 （一）中考备考指引 1.概念 情态动词是表示说话人的情绪、态度或语气的动词，本身有一定的词义，但不能单独作谓语，要和其他动词原形一起构成谓语部分。常见的情态动词有：can 能/may, might能够/will, would（表意愿）/need需要/dare敢/must必须/have to不得不/shall,should应该/ought to应该（表义务）…… 2.情态动词的语法特征 （1）不能表示正在发生或已经发生的事情，只表示期待或估计将要发生的事情。 （2）后接动词原形。 （3）没有人称和数的变化。 （4）没有非谓语动词形式，即没有不定时、分词等形式。 【注意】 ①must, can（could）, may（might），ought to只做情态动词。 ②need，dare既可作情态动词又可作实义动词。 ③shall（should）, will（would）既可作情态动词又可作助动词。 ④has/ have/ had to, used to, had better也具有情态动词的特征。 （二）考点精讲解析（使用及注意事项） 考点1 情态动词 （1）can和could 表示水平、可能性、怀疑或推测（限于否定句、疑问句或感叹句中）和允许。 【注意】 could用于一般疑问句中比can语气更委婉，属于现在的情况。 如：The radio is pretty loud. Could you please turn it down a bit? （2）may 和might 表示允许、推测（用于肯定句）、请求或规劝和祝愿。 （3）must和have to
①must表示义务或责任、很有把握的推测（用于肯定句）和禁止（mustn’t）。 ②must是说话人的主观看法，而have to则强调客观需要。 must只有一般现在时，have to有多种时态形式。 ③must的否定形式：mustn’t表示“不准” ④由must构成的一般疑问句，否定回答用needn’t或don’t have to（不必）。 如：—Must we hand in our exercise books now? —No, you needn’t. / No, you don’t have to. （4）should和ought to ①表示“应该”，ought to表示义务或责任，比should语气重。 ②表示劝告、建议和命令。should和ought to可通用，但在疑问句中常用should。 （5）shall和should ①表示允许或命令（常用于第二、第三人称）。 ②表示征求意见（常用于第一、第三人称的疑问句中）。 （6）will和would 表示意愿或决心、有礼貌的请求、习惯动作和预言。 （7）need 1）作情态动词时，用于否定句和疑问句中，在肯定句中用must，have to, ought to或should。 如：○1—Need I go with her? —Yes, you must./ No, you needn’t. ○2You needn’t worry about it because it’s not your fault. ○3We needn’t do it again, need we? 2）作实义动词时，后接to do，表示与主语的关系是主动的，若与主语的关系是被动的，则接doing或者to be done。 如：○1You don’t need to do it by yourself. ○2The table needs painting./ the table needs to be painted. （8）had better 表示“最好，应该”，后接动词原形，had通常缩写为’d；否定形式是：
中考复---系和情 出人使用：班姓名 学目： 1.系 be, keep， become, get, turn, look,smell,sound,taste,feel 的用法。 2.情 can、must、 need、 may、 should 等的用法 系 ★常的系：be, keep， become, get, turn, look,smell,sound,taste,feel （一是，一保持，三得，五起来）用法：① +adj. ②没有被 1. Cotton ___ nice and soft. A. is felt B. is feeling C. feel D. feels 2.Oh, the milk ___ strange—do you think it's OK to drink? A. was tasted B. tasted C. is tasting D. tastes 3.She told us a story. Her voice sounded_____. A. sweet B. small C. clearly D. sadly 4. This silk dress _____ so smooth. It’ s made in China. A. tastes B. smells C. sounds D. feels 情 考点一：情(can ,may ,must ,should )+原形 考点二：考情的含 一． can 1.表达“能力” 例：① We can use the computer now. ② Can you swim ? Yes , I can . No ,I can’t . 2.表示“ 可” Can I have a look at your new pen? 二． could 1.could 是 can 的去式，表示去的能力。 例： Could the girl write before she went to school? Yes , she could .No,she couldn’t 2.could 在疑句中有表示委婉的气 例： Could you please get some chalk for me ? Yes , I can . 三．may 表示求、可 例： May I watch TV this evening? Yes, please. / Certainly.No ,you mustn ’ t . / can’ t . 四．must“必” 例：① We must do everything step by step. ②You mustn’t smoke here . ③--Must we hand in our homework now? --No, you needn ’t./No, you don ’ t have to. 五． needn’t + 原形(不必?) 例： You needn’t worry about time . It’s early . 六． should“ ” 例：① The old should be spoken to politely. ②You shouldn ’t waste any time. 考点三：情表推 1.can ’ t “不可能”。 例：① The man can’t beour teacher because he is much younger than our teacher. ② —Can it be our teacher?—No, it can’bet our teacher. He is on a visit to the Great Wall. 2.may 可能性，“可能，或” 例： He may be wrong , but I’m not sure. 3. must表示有把握的推，“一定是”。
授课教案 学员姓名：____ 授课教师：杨老师所授科目：英语 学员年级：上课时间： ________ 年月日时分至时_______________________ 共小时
1）表允许，请求二can
need既可用作情态动词，也可用作实义动词。用作情态动词时，用作实义动词时，可用于各种句式。 1) .用作情态动词，用于否定句和疑问句中。 a) .Need I ….? Yes , you must / No, you needn ' t . Need we finish the work today ?Yes you __? A.need B.can C. may D.must b) . need + do sth .变否定句：n eed n' t do sth 变疑问句：Need sb do sth ? 2) .用作实义动词 a) . need + to do sth . We n eed _____ (buy) some school things . 变否定句：don' t /doesn' t /didn ' t +need to do sth . 变疑问句：Do / Does /Did sb + n eed to sth ? Yes , … do/ does / diN o, sb don ' t / doesn ' t /didn ' t . You don ' t need to do it yourself. b) .当主语是物时。Sth + need + doing sth = Sth +need to be done . The table n eeds pain ti ng . =The table n eeds ________________ . 5.had better 的用法 1) . had better + 动词原形=It' s best to do sth . You had better _____ (stay )at home . = __________________ stay at home . 2) . Had better n ot + 动词原形 We had better________ (not play ) the computer games . 6.must 与have to Y es, please. / Certai nly 疑问句中must改为 主要否定句或疑问句中
情态动词 一．情态动词基本用法 1.? can和could，用在否定句和疑问句中,表示惊讶，用在否定句和疑问句中。 How could you do such a silly thing? ?cannot....too/enough 表示“无论...也不过分，越...越好”。 You can’t be too careful while driving? 2.may和might的区别 ?表示许可、可能性、祝愿等意义，might比may更委婉。 A:给别人许可时。-May I play basketball this afternoon？ B:may/might as well+动原，“最好，倒不如”。 ?may作“可以”讲时，疑问句回答用mustn’t/can’t表示禁止。 3. Must的用法 ?表示禁止（用于否定中） You mustn’t smoke in the bedroom. ?表示偏执、固执 -Could I have a word with you,mum? -Oh dear,if you must. ?must的否定回答 A:作必须讲时，疑问否定回答用don’t have to,needn’t B：推测，一定讲时，回答用can’t. C:mustn’t表禁止。 --May I use your car? --No, you mustn’t./-Sorry,you’d better not.(委婉) 注意：must强调内在职责，而have to 强调迫于外界压力，不得已而为之。 4 .shall的用法
?一、三人称征求意见时。请求对方时。Shall we begin our class? ?二，三人称陈述句中，说话人给对方的命令，警告、允诺或威胁。 You shall not get my support if you do such a thing. 5.will和would的区别 ?自愿主动提出，如：意志、愿望或决心，would 过去，will not表示拒绝。 I have told him again and again to stop smoking,but he will not listen. ?will习惯性动作，有“总是”或“总要”之意。 Everything he will have a walk along this year. ?would过去习惯性动作，比used to 正式。 Last year our English teacher would sometimes tell us stories in English after Class. ?used to do 过去常，过去一直------只表示过去。 be used to do “用来”/be used to doing习惯于-----可表过、现或将。 6.dare表示敢于情态：dare do Dare you go home along？ 及物：dare to do Do they dare to say what she thinks? 7.need用法情态：need do 及物need to do表示主动 need doing 被动My overcoats needs washing. 8. must一定要,必须，应该（现在时） have to 客观需要，能用于更多时态（过去或将来）注意 ought to 表示义务和责任“应该”，比should语气强。 You ought to take care of yourself. 二．情态动词表推测用法
Test 9 情态动词 1. The ground is wet. It _______ yesterday. A. could have rained B. must have rained C. might have rained D. need have rained 2. I regret telling him the secret. I _______ the secret for you. A. could have kept B. must have kept C. should have kept D. need have kept 3. You _______ say anything if you don’t want to. A. haven’t B. can’t C. mustn’t D. needn’t 4. Women _______ out to work, but most of them choose to stay at home and take care of the whole family. A. could have gone B. must have gone C. should have gone D. need have gone 5. He knew nothing about Shanghai; he _______ there. A. needn’t have been B. mustn’t have been C. might not have been D. couldn’t have been 6. Investigators agree that passengers on the airliner_______ at the moment of the crash. A. should have died B. must be dying C. must have died D. ought to die 7. He ought _______ have revealed the secret of the company. A. not to B. to not C. not D. never 8. He was a persistent boy and he _______ speak English fluently by constant practice. A. could B. might C. must D. was able to 9. The English of this article is so good. She can’t _______ it herself. A. have to write B. have written C. had written D. be written 10. I want it to be done quickly, but you _______ it by overtime work. A. need not to do B. do not need do C. need not do D. need do not 11. You _______ me, because I didn’t say that. A. must misunderstand B. must be understanding C. must have misunderstood D. had to misunderstand 12. He worked hard, so he _______ pass the exam this time. A. succeeded to B. might C. was able to D. could 13. You _______ so nervous; it is only a pure talk but not an interview. A. needn’t have been B. need have been C. couldn’t have been D. could have been 14. Jane’s score in the test is the highest in her class; she _______ have studied very hard. A. may B. should C. must D. ought to 15. He _______ the train, for he had started out so early. A. could not have missed B. must not have missed C. should have missed D. should miss 16. It _______ around nine o’clock when I drove back home because it was already dark. A. had to be B. was to be C. must have been D. must be 17. We _______ him the news because he knew it already. A. told B. would have told C. needn’t have told D. needed to tell 18. You _______ park your car here. A. won’t B. don’t C. are not to D. are not going to 19. _______ the window for you? A. Shall I open B. Will I open C. Shall I to open D. Open
2012-2013学年初三下学期英语复习题（第09周）姓名：______________ 成绩：_______________ ---非谓语动词考点讲解和训练 1.（成都市2012）Parents often ask their kids ______ their internet friends because the kids may be in danger. A. to meet B. not to meet C. meeting 2.（北京市2012）Let’s ____ for a walk, shall we? A. to go B. going C. go D. Gone 3.（广安市2012）---Dad, why should I stop ______ computer games? ---For your health, my boy. A.to play B.playing C .play 4.（绵阳市2012）Excuse me, would you mind _______ your voice down, please? A. to keep B. keeping C. keep D. kept 5.（绵阳市2012）I’m not sure when the plane will __________ and when it will land. A. take off B. run off C. open up D. stay up 7.（重庆市2012）Mr. Li asks the students __________in the river, because it’s too dangerous. A. swim B. to swim C. not to swim D. to not swim 8.(资阳市2012）Why not join an English club to practice ______ English, Joe? A. to speak B. speaking C. speak D. spoke 10.(自贡市2012)--When are you going to have your hair ______?--This afternoon. A. cut B. to cut C. cutting 11.(自贡市2012) You should keep the window __________ because the room is too hot. A. open B. opening C. opened 12.【2012贵州贵阳】It took Janet three hours _______ reading this interesting story. A. to finish B. finished C. finishing 13.【2012广东】. It took me two weeks_______reading the novels written by Guo Jingming. A. finish B. to finish C. finishes D. Finishing 15.【2012湖北咸宁】Drivers shouldn't be allowed _______ after drinking, or they will break the law. A. drive B. driving C. to drive D. to be driven 16.【2012江苏宿迁】---Which do you prefer, Chinese food or Western food? ---I would rather ______Chinese food. Let’s have noodles. A. to have B. having C. had D. have 17.【2012 内蒙古包头】______energy, turn off the hot water after you take a shower. A. Save B. Saving C. Saved D. To save 18.【2012河南】______ out your love. The world will become a nicer place to live in. A. Speak B. To speak C. Spoke D. Speaking 19.【2012.山东菏泽】Welcome to our school, ladies and gentlemen. ______, I’d like to introduce myself. A. To be honest B. To my surprise C. To start with D. To tell you the truth 20.【2012山东聊城】________ English well, one must have a lot of practice. A. Speaks B. To speak C. Spoken D. Speak ---情态动词考点讲解和训练 1.（成都市2012）---Excuse me, whose Japanese book is this? ---It ______be Tom ' s. In our class, only he is studying Japanese. A. must B. can't C. Would
九年级英语情态动词知识点（大全） 一、初中英语情态动词 1.—Could you go to the bookshop with me? I want to buy The Grass House by Cao Wenxuan. —Sorry, I _, I've promised Mum to go home right after school. A. can't B. couldn't C. needn't D. mustn't 【答案】A 【解析】【分析】句意：一你能和我去书店吗？我想买一本曹文轩写的《草房子》。一对不起，我不能去。我答应我妈妈放学后直接回家了。在问句中的could表示委婉语气，不是过去式，所以回答时用can，t,不能：needn't不需要：mustrft一定不要，千万别。结合句意，故选A。 【点评】考查情态动词，回答could提问的时候应使用can。 2.?—Where is George? —He be here just now. His coffee is still warm. A. need B. can*t C. must D. shouldn't 【答案】c 【解析】【分析】句意：一一乔治在哪里？一一他刚才一定在这里，他的咖啡还是热的。A. need 需要：B. can't不能，不可能（表示推测）；C. must必须，一定（表示推测）：D. shouldn't不应该:根据His coffee is still warm.可知表示肯定推测一定在这儿:故答案为C。 【点评】考查情态动词.掌握情态动词表推测时的意义和用法。 3.—Life is becoming convenient with the Internet. -That's true! Almost everything be done online. A. must B. could C. should D. can*t 【答案】B 【解析】【分析】句意：一一生活正随着网络变得方便。一一那是真的。几乎所有的事情可以在网上完成。A必须，B可以，C将，D不能°根据Life is becoming convenient with the Internet.生活正随着网络变得方便，可知应该是很多事情可以在网上完成，故选 【点评】考查情态动词。注意理解和掌握情态动词的不同用法。 4. A hard-working man become a great scientist, but a great scientist be a hard-working man. A. can't; can B. may not; must C. can't; must D. may not; can 【答案】B 【解析】【分析】句意：一个勤奋的人可能不会成为一位伟大的科学家，但是一位伟大的科学家一定是一个勤奋的人。can't不可能，不会：can可能，能，会：may not可能不：must必须，一定：结合句意，可知，第一个空为“可能不”，第二个空为“一定"，故答案为 B, 【点评】考查情态动词:掌握情态动词表推测时的意义和用法°
用must\need\may开头的疑问句回答的肯定和否定回答形式 —Must I do it at once？ —No，you ____ ． A．mustn't B．needn't C．can't D．don't 此题应选B。一般说来，以must 引出的一般疑问句，其否定回答通常是用needn't （=don't have to），这与其说是一个语法问题，不如说是一个语境或上下文是否通顺的问题。 注意以下各组问答句，并注意体会其汉语译文： 1．—Must I come before dawn？我必须天亮前来吗？ —Yes, you must．是的，必须天亮前来。 —No, you needn't．不必天亮前就来。 —No, you don't have to．不必天亮前就来。 2．—May I smoke in the room？我可以在这个房间抽烟吗？ —Yes, you may．当然可以。 —Of course, you may[can]．当然可以。 —No, you may not[mustn't，can't]．不行。（语气较生硬） —You'd better not[Better not]．最好不要抽。 —I'd rather you didn't．还是不抽的好。 —Please don't．请不要抽。 3．—Need I finish it today？我必须今天完成它吗？ —Yes, you must [have to, should]．是的，今天必须完成它。（肯定回答不能用Yes，you need，因为情态动词need 只用于否定句或疑问句，不用于肯定句） —No, you needn't．不必今天就完成它。 —No, you don't have to．不必今天就完成它。
专题九情态动词 考点透视与解读 【目标导航】 【名师讲堂】 （1）表示“能力、技能、功能”等”,可以和be able to转换。例如： He can play the guitar very well. ＝He is able to play the guitar very well.他吉他弹的很好。 She could speak French well when she was in college. =She was able to speak French well when she was in college.在上大学时，她会讲法语。 【注意】 Can表示能力的时候，虽然可以和be able to转换，但can只有一般式和过去式两种时态，而be able to可以用于各种时态。 （2）表示“允许、请求、要求、建议”等。例如： You can tell him the news.你可以告诉他那个消息。 Can I open the door for you ?我可以替你开门吗？ （3）用could代替can ，表示语气的婉转。例如：
Could you help me clean the room? 你能帮我打扫房间吗？ Could you go to the movie with me?你可以和我一起去看电影吗？ （4）表示怀疑、猜测，常用于否定句和一般疑问句中。如： He can’t be an English teacher.He knows little English.他不可能是老师，他几乎不懂英语。She is so young ,can she be your mother?她如此年轻，会是你妈妈吗？ （1）作“可以”解，用来表示请求或许可．如： May I borrow your eraser? 我可以借你的橡皮吗？ You may ride a bike to school .你可以骑自行车去上学。 （2）作“可能”解，用来表示猜测，但语气不如must强烈，多用于肯定句。 I don’t know the way to the train station.Jack may know.我不认识去火车站的路。杰克可能知道。 Mr Wang may be at home.王先生可能在家里。 【注意】 ①辨析maybe和may be maybe 是副词，意为“也许”，通常用于句首．may be 的实质是情态动词may后面碰巧跟上动词原形be ,意为“可能是”，用作表语，通常用于句中．请比较： Maybe his father is a policeman. ＝His father may be a policeman.他爸爸可能是个警察。 ②might是may的过去式，might本身也是一个情态动词，用于现在时中表示可能性比较小。如： 一Whose guitar is this? 一这个吉他是谁的？ 一It might belong to Alice.She plays the guitar. 一可能是艾丽丝的，她弹吉他。
情态动词can的基本用法 情态动词can有一定的词义,但不能独立存在,它必须与动词原形一起构成谓语。 情态动词can没有人称和数的变化。 一、其具体用法如下: 1.表示"能、会",指脑力或体力方面的"能力"。 例如: I can speak English.我会讲英语。 Jim can swim but I can't.吉姆会游泳,但我不会。 2.表示"可能",常用于否定句或疑问句中,指某种可能性。 例如: Han Mei can't be in the classroom.韩梅不可能在教室里。 Can he come here today, please?请问他今天能到这里来吗？ 3.表示"可以",常用于口语中,指许可或请求做某事。 例如: Can I have a cup of tea, please? 请问我可以喝一杯茶吗？ Y ou can go out.你可以出去了。 补充: ①can在口语中可以代替may,表示许可或可以。 ②can't在口语中代替mustn't时,表示禁止或不准。 例如: Y ou can't play football in the street. 不准在马路上踢足球。 ③情态动词can的过去式could,用于现在时,可使语气更委婉、更客气。 如: Could you help me with my English? 你能帮助我学习英语吗？ 二、情态动词can的基本句型 1.肯定句型为: 主语+can+动词原形+其它。 例如: They can play basketball.他们能打篮球。 She dance.她会跳舞。 Y ou go to watch TV.你可以去看电视了。
情态动词can的基本用法： 情态动词can有一定的词义，但不能独立存在，它必须与动词原形一起构成谓语。情态动词can没有人称和数的变化。其具体用法如下： 1. 表示"能、会",指脑力或体力方面的"能力"。例如： I can speak En glish. 我会讲英语。 Jim can swim but I can't. 吉姆会游泳，但我不会。 2. 表示"可能",常用于否定句或疑问句中，指某种可能性，此时can 't译为“不可能”。例如： Han Mei ca n't be in the classroom. 韩梅不可能在教室里。 Can he come here today, please? 请问他今天能到这里来吗？ 3. 表示"可以",常用于口语中，指许可或请求做某事，可以代替 may。例如: Can I have a cup of tea, please? 请问我可以喝一杯茶吗？ You can go out. 你可以出去了。 补充：can的过去式could，意为“能、会”，表示过去的能力 女口： He could write poems when he was 10. 他十岁时就会写诗。 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？一 Could I use your pen?我能用一下你的钢笔吗？一Yes, you can.可以。（注意回答） 情态动词can的基本句型:
1. 肯定句型为：主语+can+动词原形+其它。例如： They can play basketball. 他们能打篮球。 She can dance.她会跳舞。 You can go to watch TV. 你可以去看电视了。 2. ........................... 否定句型为：主语+can not（can't/cannot）+ 动词原形+其它。表示"某人不能（不会。不可能）做其中can't是can not的缩略式，英国多写成cannot。例如： You cann ot pass the ball like this. 你不能像这样传球。 I ca n't ride a motorbike. 我不会骑摩托车。 3. 疑问句句型分为：一般疑问句句型和特殊疑问句句型两种类型。 ⑴一般疑问句句型为:Can+主语+动词原形+其它。表示"某人会（能。可以）做吗?",用于口语时，常表示请求或许可。其肯定答语用""Yes,主语+can."作答; 否定答语用"No,主语+can't."作答。注意答语中做主语的人称代词,应根据问句中的主语作相应的变化。其变化规则为：第一人称问，则第二人称答；第二人称问，则第一人称答;第三人称问，第三人称答。例如： ①-Can you sing an En glish song for us? 你可以为我们大家唱一首英语歌吗？
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。 分类： 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 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。 I can see you. Come here. 我能看见你，过来吧。 He must have been away. 他一定走了。 What can I do for you? 我能帮你吗？ How dare you treat us like that！ 你怎能那样对待我们！ 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。情态动词没有非谓语形式，即没有不定式，分词，等形式。 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。 I'm sorry I can't help you. 对不起，我帮不上你。 基本助动词与情态助动词最主要的区别之一是，基本助动词本身没有词义，而情态助动词则有自己的词义，能表示说话人对有关动作或状态的看法，或表示主观设想： What have you been doing since? （构成完成进行体，本身无词义） I am afraid I must be going. （一定要） You may have read some account of the matter. （或许已经） 除此之外，情态助动词还有如下词法和句法特征：
复习专题情态动词完整归纳 一、初中英语情态动词 1．— We've ordered too much food. I eat any more. —Never mind. Let' take it home. A. can't B. mustn't C. needn't D. shouldn't 【答案】 A 【解析】【分析】句意：——我们已经点了太多的食物，我不能再吃了。——没关系，我们带回家吧。can't不能；mustn't必须不；一定不要；needn't不必；shouldn't不应该。根据句意可知选Ａ。 【点评】考查情态动词辨析。 2．—Life is becoming convenient with the Internet. —That's true! Almost everything ______ be done online. A. must B. could C. should D. can't 【答案】 B 【解析】【分析】句意：——生活正随着网络变得方便。——那是真的。几乎所有的事情可以在网上完成。A必须，B可以，C将，D不能。根据 Life is becoming convenient with the Internet. 生活正随着网络变得方便，可知应该是很多事情可以在网上完成，故选B。 【点评】考查情态动词。注意理解和掌握情态动词的不同用法。 3．A hard-working man ______ become a great scientist, but a great scientist _______ be a hard-working man. A. can't; can B. may not; must C. can't; must D. may not; can 【答案】 B 【解析】【分析】句意：一个勤奋的人可能不会成为一位伟大的科学家，但是一位伟大的科学家一定是一个勤奋的人。can't不可能，不会；can可能，能，会；may not 可能不；must 必须，一定；结合句意，可知，第一个空为“可能不”，第二个空为“一定”，故答案为B。 【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4．Look at the sign! It says “No Smoking!” You ________ smo ke here. It's dangerous. A. mustn't B. ought not to C. needn't D. don't have to 【答案】 A 【解析】【分析】句意：看这个标志！上面写道“禁止吸烟！“你不能抽烟。这是危险的。 A.mustn't 禁止，不允许； B.ought not to不应该，不应当； C.needn't不必； D.don't have to 不必。根据“No Smoking!”可知此处禁止吸烟，故答案为A。