高考英语情态动词知识点真题汇编及答案解析(4)
高考英语情态动词知识点真题汇编及答案解析(4)
一、选择题
1．Skills like critical thinking and analysis ________ be found on the Internet, because they must be acquired in the context of facts.
A．can’t B．needn’t C．mustn’t D．shouldn’t 2．—Can I pay the bill by check?
—Sorry，sir．But it is the management rules of our hotel that payment _____ be made in cash．A．shall B．need
C．will D．can
3．——I called you last night, but no one answered.
——Sorry, I____________ sleeping.
A．need have been B．would have been C．must have been D．should have been 4．You ______ feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.
A．may B．can C．should D．would 5．—Where is my dictionary?I remember I put it here yesterday.
—You___it in the wrong place.
A．must put B．should have put
C．might put D．might have put
6．For all of the diligent students here, I give you my promise: Work hard, and you ________ be rewarded!
A．can B．need C．shall D．could
7．Home is not just the place where you grow up. It ________ be a warm smile, a sincere hug, and a shoulder for you to cry on.
A．must B．can C．will D．should
8．You ________ give me a lift. I want to walk home for exercise.
A．needn’t B．couldn’t C．can’t D．mustn’t
9．-Jenny took the 8：00 bus to Guangzhou this morning.
-Really? He＿＿the 9:00 train. It's much more comfortable and safer to travel by train. A．could have taken B．should take
C．must have taken D．can take
10．--Is Jack still in hospital?
--Yes. He _________ the bad food.
A．wouldn’t eat B．shouldn’t eat
C．wouldn’t have eaten D．shouldn’t have eaten
11．–Will you read me a story, Mummy?
--OK. You ______have one if you go to bed as soon as possible.
A．might B．must C．could D．shall
12．—I can’t think why he________ so angry. I mean no harm.
—It’s typical of him to be sensitive(敏感的).
A．should have been B．must have been
C．might have been D．can have been
13．According to the latest rule, people _______sort household garbage into four categories. A．can B．shall C．may D．need
14．—Do you know where Tony is?
—He _________ in the living room. I saw him there just now.
A．shall be B．should have been C．might have been D．must be
15．You ___________ a better mark, but you didn’t work hard.
A．could have had B．would have had C．must have had D．must have 16．She looks very happy. She_________ the exam.
A．can have passed B．should have passed C．must have passed D．could have passed 17．More and more countries have come to realize that the world____ do without Huawei and its "more advanced" technology.
A．can’t B．needn’t C．mustn’t D．shouldn't 18．—I’m sorry, I ________ have been so rude to you that way.
—Forget it, but I was a bit out of control yesterday.
A．mustn’t B．shouldn’t
C．couldn’t D．needn’t
19．One of our rules is that every student _______ wear school uniform while at school. A．might B．could
C．shall D．will
20．(2018·北京) In today’s information age, the loss of data _________ cause serious problems for a company.
A．need B．should
C．can D．must
21．He ______ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.
A．shouldn’t be B．can’t have f inished
C．can’t be D．mustn’t have finished
22．Tom told us that he ______ come to the party tonight, but he wasn’t sure about this.
A．will B．would C．could D．might 23．Although passing the driving test ________ be difficult now, it’s worth the efforts. A．need B．shall
C．can D．should
24．There’s no light on --- they _______ be at home.
A．can’t B．mustn’t C．needn’t D．wouldn’t
25．I didn’t hear the phone. I ___ asleep.
A．must be B．must have been
C．should be D．should have been
【参考答案】***试卷处理标记，请不要删除
一、选择题
1．A
解析：A
【解析】
【详解】
考查情态动词词义辨析。句意：像批判性思维和分析这样的能力，是不能在互联网上找到的，因为它们必须基于事实来获得。A. can’t无法，不可能；B. needn’t不需要；C. mustn’t 不可以，禁止；D. shouldn’t不应该。本题讲的是这种批判性思维的能力无法通过浏览鱼龙混杂的网上信息获得，表达的是客观上的不可能，故选A。
2．A
解析：A
【解析】
【分析】
【详解】
考察情态动词用法。句意：——我能用支票付账吗?——对不起,先生。但这是我们酒店的管理规定,支付要用现金。shall可以表示命令，警告，强制，或者指规则和法律要求做的事情。本题正是考察了shall表示按照规则和法律要求做的事情。故A正确。
3．C
解析：C
【解析】
【详解】
考查情态动词+have done。句意：——我昨晚给你打电话了，但没人接。——对不起，我一定是睡着了。这里在对过去的一件事情进行推测。固定结构：must have done表示对过去事情有把握的肯定推测。故选C。
4．A
解析：A
【解析】
【分析】
【详解】
考查情态动词。句意：你可能觉得所有的训练都是在浪费时间，但我百分之百地肯定，以后你会感谢你所做的一切。A. may可能；或许；B. can可能；C. should应该；D. would 会；将会。根据句意表示“可能；或许”，不是那么肯定，故选A。
5．D
解析：D
【解析】
【详解】
考查情态动词。句意：——我的词典在哪里？我记得昨天放在这里了。——你或许放错了
地方。“might have +动词+ed形式”表示过去可能完成的动作。根据所提供的情景Where is my dictionary? I remember I put it here yesterday.可判断出把词典放在某个地方发生在过去，所以要用“might have +动词+ed形式”。“should have + 动词+ed形式”表示“(过去)本来应该做某事”。must意为“一定”，是肯定的推测，与所提供的情景的矛盾。might put表示现在发
生的事。故选D。
6．C
解析：C
【解析】
【详解】
考查情态动词。句意：对于在座的所有勤奋的学生，我向你承诺：努力工作，你将获得回报！分析句子可知，promise有承诺、许诺之意，shall可用于第二、第三人称，表许诺，故选C。
7．B
解析：B
【解析】
【详解】
本题考查情态动词。解题步骤：1.确定各项意思：A. must必须，偏要；B. can能，可能；C. will将，会；D. should应该；2.确定答案：此处表示一种客观的可能性，应使用情态动词can。句意：家不仅仅是我们成长的地方。它也可能是一个温暖的微笑，一个真诚的拥抱和你可以依靠哭泣的肩膀。故选B。
8．A
解析：A
【解析】
【分析】
【详解】
考查情态动词。句意：你不必让我搭车。我想步行回家锻炼身体。A. needn’t不必；B. couldn’t不能；C. can’t不会；D. mustn’t禁止，不允许。根据I want to walk home for exercise.可知，你不必让我搭车。故选A。
考点：考查情态动词
9．A
解析：A
【解析】
【分析】
【详解】
考查情态动词。句意：Jenny今天早上坐8：00的客车去广州了。真的吗？她本能够坐9：00火车的，乘火车去旅游更安全舒适。情态动词加have done表示对过去的猜测，A.表本可能做了某事；B.表应该做某事；C.表过去一定做了某事D.可能，能够做某事。根据句
意，此处是对过去的虚拟，故选A。
10．D
解析：D
【解析】
试题分析：句意;--杰克孩子医院吗？--是，他本不应该吃坏的食物的。因为是过去吃了坏食物，所以排除AB，这里的shouldn’t have done表示“过去本不应该做而做了”，wouldn’t have done过去本不会做而做了，所以选D。
考点：考查情态动词和虚拟语气
11．D
解析：D
【解析】
【分析】
【详解】
考查情态动词。句意：——妈妈，给我讲个故事好吗？——好，如果你尽快上床睡觉，我
就给你讲一个。might表示“或许”；must表示“必须”；could表示“可能”；shall在此处表示“允诺”，符合句意，故选择D项。
12．A
解析：A
【解析】
【分析】
【详解】
考查情态动词的用法。句意：——我不能明白为什么他竟然如此生气。我无意冒犯他的。——他一直很敏感。should可以用来表示意外、惊喜或者在说话人看来是不可思议的，尤
其在以why，who，how等开头的修辞疑问句或某些感叹句中常常译为“竟会”、“居然”。故选A。
13．B
解析：B
【解析】
【分析】
【详解】
考查情态动词辨析。句意：根据最新的规定，人们应该把生活垃圾分成四类。A. can能；B. shall应该；C. may也许；D. need需要。shall用于第二人称表示承诺、命令、警告、威胁
的口吻，这里是指法令规定了……，因此用shall。故选B。
14．D
解析：D
【解析】
【分析】
【详解】
考查情态动词。句意：—你知道Tony在哪里？—他一定在客厅。我刚才看到他在那里。shall用于第二、第三人称，常表示说话人给对方命令、警告、允诺或威胁；should have been 意思为“本应该做……，但实际上没有做”；might have done 意思为“可能已经……”，表示对过去发生事情可能性的推测。根据语境“I saw him there just now.”可知，说话人是对现在情况作出肯定的猜测；“must+动词原形”可表示对现在情况肯定的猜测，意思为“一定，肯定”。故选D项。
15．A
解析：A
【解析】
【详解】
考查情态动词+have done。句意：你本来可以取得更好的成绩，但你没有努力。根据“but you didn’t work hard”可知，此处用could have done表示“本可以……，而实际上没有”，故A项正确。
16．C
解析：C
【解析】
【分析】
【详解】
考查情态动词。句意；她看起来很高兴。她一定通过了考试。must /could+ have done表示对过去发生的事情的推测，意为“一定/可能（已经）…”，本句中根据语境She looks very happy可判断，用 must have passed语气较强，意为“一定是已经通过了（考试）”，故排除D项，选C。
【点睛】
本题考查情态动词完成式表推测。我们知道，表示推测的情态动词常用的有must / may / might / could/should/ ought to等，其中，must语气最强，只用于肯定句中，can/could常用于否定句和疑问句，may/might常用于陈述句。其后加“have +过去分词”形式时，常常表示对过去情况的推测。例如：
（1）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。
（2）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。
（3）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”。
17．A
解析：A
【解析】
【分析】
【详解】
考查情态动词。句意：越来越多的国家意识到世界上离不开华为和它更先进的科技。A. can’t不能；B. needn’t不需要；C. mustn’t一定不能；D. shouldn't不应该。can’t do without 意为“离不开”，为固定搭配。故选A。
；表示对过去情况的推测，接动词完成式。
18．B
解析：B
【解析】
考查情景交际和情态动词。句意：——抱歉，我本不该用那种方式对你那么粗鲁。——不必在意，昨天我也有点失控。根据对话可知，此处是对过去所做事情感到后悔。shouldn’t have done表示本不该做而做了。故选B。
19．C
解析：C
【解析】
【分析】
【详解】
考查情态动词辨析。句意：我们其中的一条规则要求每个学生在校期间都要穿校服。A. might可以；B. could 可能；C. shall 一定；D. will会。shall可以表示“命令，警告，强制要求；允诺；法律，规定要做……”，结合句意可知C正确。故选C项。20．C
解析：C
【解析】
考查情态动词。句意：在今天的信息时代，数据的丢失有时会对一个公司造成严重的问题。数据丢失造成严重问题是客观上会发生的情况，即“客观可能性”，故该空应用情态动词can。C选项正确。其余情态动词均没有该用法。need需要；should应该，竟然；must 必须，肯定。
点睛：can的基本用法：1. (表示能力、功能)能，会；2. (表示推测)可能，可能会；3.（表示允许，请求）可以；4.（表示客观可能性）有时会。
21．B
解析：B
【解析】
【详解】
考查推测句。句意：他现在不可能写完了卷子。我十分钟之前留下他时，他还没有写一个字。根据句意可知，此处考查对过去情况的否定推测，其表达为can’t have done不可能做某事，故选B项。
【点睛】
本题考查推测句
对过去情况的肯定推测是must have done
对过去情况的否定推测是can’t/couldn’t have done
例如:
The ground is wet, so it must have rained last night.
He can’t have finished his work, because he played basketball all day yes terday.
22．D
解析：D
【解析】
【分析】
【详解】
考查情态动词。句意：汤姆告诉我们他今晚可能来参加聚会，但他对此没有把握。此处表示一种没有把握的推测，“或许，大概，可能”，故选D。
23．C
解析：C
【解析】
考查情态动词。A. need需要； B. shall将要； C. can能够； D. should应该。句意：虽然现在通过驾驶考试是很困难的，但这是值得的。此处表示一种客观事实的可能，故选C。
24．A
解析：A
【解析】
【分析】
【详解】
考查情态动词。句意：灯没开着，他们不可能在家。A. can’t不可能；B. mustn’t 不允许，一定不能；C. needn’t不必；D. wouldn’t不会。此处表示推测，指不可能。故选A。25．B
解析：B
【解析】
试题分析：考查情态动词。句意：我没有听到电话，肯定是睡着了。根据I didn’t hear the phone可知是对过去的肯定推测，故用must have done,因此选B项。
考点 : 考查情态动词
高考英语情态动词专题复习
情态动词精品学案 情态动词解读: ①本身有一定的词义，表示说话人的情绪、态度或语气的动词。 ②不能单独作谓语。 ③和其他动词原形构成谓语。 ④谓语动词之前。 ⑤无人称和数的变化。 ⑥否定式构成是在情态动词后面加“not”。 ⑦个别情态动词有现在式和过去式两种形式，过去式可以用来表达更加客气、委婉的语气，时态性不强，可用于过去，现在或 将来。 经典例句： 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？ How dare you treat us like that! 你怎么敢那样对待我们! We can't carry the heavy box. 我们搬不动那箱子。 情态动词考点： 1.情态动词表示推测。 2.情态动词的基本用法。 3.情态动词的答语。 1 / 17
常见情态动词： 情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词的基本用法： 一、can, could 1) 表示能力（体力、知识、技能）时，等于be able to 。 a)Can you lift this heavy box?（体力） b)Are you able to lift this heavy box? c)Mary can speak three languages.（知识） d)Is Mary able to speak three languages? e)Can you skate?（技能） 此时可用be able to代替。 2) can表示请求和允许。 -----Can I go now? ----- Yes, you can. / No, you can’t. 此时可与may互换。在疑问句中还可用could, might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。（特别注明：这是在表示请求和允许的时候。） ---- Could I come to see you tomorrow? ---- Yes, you can. (No, I’m afraid not. ) can't在否定句中可以表示命令，不允许，但是语气比mustn't弱，具有劝慰的意思. 3)can表示“有时会”： A kind person can lose temper sometimes. 4）表示与五种感官和知觉的动词连用。 I can hear/ see you clearly from here. You can imagine how annoyed she was ! 2 / 17
英语情态动词专项练习题及答案含答案解析
英语情态动词专项练习题及答案含答案解析 一、初中英语情态动词 1．— _______ you play tennis? —Yes, and I'm a good player. A. Can B. May C. Must D. Should 【答案】 A 【解析】【分析】句意：——你会打网球吗？——会，我是一名优秀的网球员。Can能，表示能力；may可以，表示允许；must必须，表示要求；should应该，表示建议；结合句意，此处表示能力，故用情态动词can，故选A。 【点评】此题考查情态动词的用法。 2．All passengers ______ go through safety check before they take a plane. A. can B. may C. must D. could 【答案】 C 【解析】【分析】句意：所有乘客登机前必须接受安全检查。A. can能够，表示能力；B. may可以，表示许可；C. must必须；D. could可能，可以。登机前必须安检。故选C。【点评】情态动词词义辨析。以及can、may、must、could四个词的词义和用法。 3．You be tired after walking for such a long time. Sit down and have a rest. A. can B. can't C. mustn't D. must 【答案】 D 【解析】【分析】句意：走了这么长时间你一定很累了。坐下休息一下吧。can能，能够，can't不能，对事物进行否定推测；mustn't一定不是，禁止，must一定，对事物进行肯定推测，根据after walking for such a long time，可以肯定你一定很累，所以是进行肯定推测，情态动词使用must，故选D。 【点评】此题考查情态动词。弄清每个情态动词的使用规则，根据句意确定所使用的情态动词。 4．—Where is Mom now? —I'm not sure. She _________ be in the kitchen. A. shall B. may C. need D. must 【答案】 B 【解析】【分析】句意：—妈妈现在在哪里？—我不确定，她也许在厨房。A. shall 将要； B. may 可以，可能； C. need 需要； D. must必须，一定；根据I'm not sure可知是不确定；故选B。 【点评】此题考查情态动词表推测的用法。 5．—Who it be that is knocking at the door? —It be father, but I'm not sure.
高中英语情态动词精讲与解析
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高考英语情态动词专项练习 Ⅰ. 单项选择 1.I thought you______like something to read, so I have brought you some books. A. may B. might C. could D. must 2. You____to the meeting this afternoon if you have something important to do. A. needn't to come B. don't need come C. don't need coming D. needn't come 3. He______ you more help, even though he was very busy. A. might have given B. might give C. may have given D. may give 4.─_______I help you with some shoes, madam? ─ Yes, I would like to try on those brown ones. A. Will B. Should C. May D. Must 5. The reason why they ____leave wasn't explained to us. A. had B. had to C. must D. might 6. I searched for my wallet and it wasn't there. I thought I___it at home. A. left B. have left C. might have left D. could have left 7. I_____asleep because it took me a long time to realize that the telephone was ringing. A. could have fallen B. should have fallen C. must have fallen D. mustn't have fallen 8. The only thing that really matters to the children is how soon they ______return to their school. A. can B. must C. have to D. ought to 9. I want to go to the chemist's, but you _____go with me.
2010-2016年情态动词高考真题
情态动词高考真题 2010年高考真题 1. (10全国I 29) Just be patient. You ______ expect the world to change so soon. A. can’t B. needn’t C. may not D. will not 2. (10全国Ⅱ) I’m afraid Mr. Harding _________see you now. He’s busy. A. can’t B. mustn’t C. shouldn’t D .needn’t 3. (10重庆21) You ______ park here! It’s an emergency exit. A. wouldn’t B. needn’t C. couldn’t D. mustn’t 4. (10江西23) I have told you the truth. ______ I keep repeating it? A. Must B. Can C. May D. Will 5. (10辽宁26) Doctors say that exercise is important for health, but it ___ be regular exercise. A. can B. will C. must D. may 6. (10安徽32) Jack described his father, who ___a brave boy many years ago, as a strong-willed man. A. would be B. would have been C. must be D. must have been 7.（10湖南23）You _______ buy a gift, but you can if you want to. A. must B. mustn’t C. have to D. don’t have to 8.(10陕西23) –May I take this book out of the reading room? --No, you ____. You read it in here. A. mightn’t B. won’t C. needn’t D. mustn’t 9. (10山东25) I _______ have watched that movie----it’ll give m e horrible dreams. A. shouldn’t B. needn’t C. couldn’t D. mustn’t 10. (10四川3) -____I take the book out? --I’m afraid not. A.Will B.May C.Must D. Need 11.(10北京23) –Good morning. I’ve got an appointment with Miss Smi th in the Personnel Department. ----–Ah, good morning. You ______ be Mrs. Peters. A.might B. must C. would D. can 12.(10浙江17) “You __ have a wrong number,” she said. “There is no one of that name here.” A. need B. can C. must D. would 13. (10江苏25) –I haven’t got the reference book yet, but I’ll have a test on the subject next month. ---–Don’t worry. You ______ have it by Friday. A. could B. shall C. must D. may 14. (10天津9) Mark ___ have hurried. After driving at top speed, he arrived half an hour early. A. needn’t B. wouldn’t C. mustn’t D. couldn’t 15.（10上海）---Sorry, Professor Smith. I didn't finish the assignment yesterday. ---Oh, you _____ have done it as yesterday was the deadline. A. must B. mustn't C. should D. shouldn't 2011年高考真题 1.(2011全国卷I) 3 2. They ________ have arrived at lunchtime but their flight was delayed. A. will B. can C. must D. should 2.（2011全国卷II）8. If you _______ smoke, please go outside. A. can B. should C. must D. may 3.（2011北京卷）2 4. - I don’t really like James. Why did you invite him? - Don’t worry. He __________ come. He said he wasn’t certain what his plans were. A. must not B. need not C. would not D. might not 4.（2011北京卷）30. Maybe if I _______ science, and not literature then, I would be able to give you more help. A. studied B. would study C. had studied D. was studying 5.（2011北京卷）28. - Where are the children? The dinner’s going to be completely ruined.
高考英语情态动词及其解题技巧及练习题(含答案)
高考英语情态动词及其解题技巧及练习题(含答案) 一、单项选择情态动词 1．It_____ have been Tom that parked the car here, as he is the only one with a car. A．may B．can C．must D．should 【答案】C 【解析】 【详解】 考查情态动词表猜测的用法。句意：一定是汤姆把车停在这儿的，因为他是唯一有车的人。A. may可能；B. can可能；C. must一定；D. should应该。由as he is the only one with a car.可知一定是他把车停在这里的，非常有把握的肯定推测，故选C。 2．We’ll make the final decision on our scheme. ______ you change your mind, please inform us as soon as possible. A．Should B．Were C．Would D．Had 【答案】A 【解析】 【分析】 【详解】 考查虚拟语气。句意：我们将对我们的计划做最后决定。如果你改变主意，请尽快通知我们。根据语境，此处用虚拟语气，表示与将来相反，从句用should+动词原形，省略if，should提前，陈述句是：If you should change your mind……。故选A。 【点睛】 虚拟语气中的倒装 当虚拟条件句中含有 were，had，should时，可以将if省略，然后将 were，had，should，移至句首： 1）If he should fail, he would kill himself. →Should he fail, he would kill himself. 万一失败，他就会自杀。 2）If I were you, I would do it at once. →Were I you, I would do it at once. 假若我是你，我就会马上做。 要是我能做此事，我一定会做。 3）If he had seen you yesterday, he would have asked you about it. →Had he seen you yesterday, he would have asked you about it. 他昨天要是看到了你，他就会问你这事了。 该小题属于上述的第一种情况。should作为情态动词，有一种特殊的用法：在虚拟条件状语从句中表示与将来事实相反的虚拟语气，可以把should放在句首，即主语前，从而省略从属连词if。原来的表述为：If you should change your mind。故选A。
(2017-2019)高考英语真题专项汇编卷：知识点03情态动词和虚拟语气(含答案)
高考英语真题专项汇编卷（2017-2019）： 知识点03 情态动词和虚拟语气 1、The workers were not better organized, otherwise they ____________ the task in half the time. A. accomplished B. had accomplished C. would accomplish D. would have accomplished 2、What a pity! You missed the sightseeing, or we _________a good time together. A. had B. will have C. would have had D. had had 3、In today’s information age, the loss of data _________ cause serious problems for a company. A.need B.should C.can D.must 4、They might have found a better hotel if they _________ a few more kilometers. A.drove B.would drive C.were to drive D.had driven 5、I can’t find my purse. I___________ it in the supermarket yesterday, but I’m not sure. A.should leave B.must have left C.might leave D.could have left 6、If we ___________the flight yesterday, we would be enjoying our holiday on the beach now. A.had caught B.caught C.have caught D.would catch permission. 7、It’ｓ strange that he _______ have taken the books without the owner’ｓ A.would B.should C.could D.might 8、There is a good social life in the village, and I wish I _______ a second chance to become more involved. A.had B.will have C.would have had D.have had 9、My room is a mess, but I ___________ clean it before I go out tonight. I can do it in the morning. A.daren't B.shouldn't C.needn't D.mustn't 10、—Do you have Betty’s phone number? —Yes. Otherwise, I ___________ able to reach her yesterday. t have been A.hadn’t been B.wouldn’ C.weren’ｔ D.wouldn’t be 11、Samuel, the tallest boy in our class, ___________ easily reach the books on the top shelf.
高中英语情态动词讲解
一、情态动词用法 1.情态动词的具体用法 A.能干can/could do; (经过努力)能干be able to (have the ability to do, be capable of doing) B.必须干/不得不干must / have to do; 不许干：mustn’t do C.(经允许)可以干may/ might do; 不可以干：may not do D.应该干should /ought to/ be to/ be supposed to do E.将要干will/would/shall do; (按法律，许诺，命令，威胁，第二三人称中) 将干shall do F.(某段具体时间)常干would do; (现在不做，过去常做) used to do G.宁愿做would rather do; 最好做had better do; 不妨做might as well do H.需要做need do ; 敢做dare do 2.情态动词表猜测 A.一定是must be ;一定已经干了某事must have done sth.; 一定不是can’t/couldn’t be ; 一定没干过某事can’t/couldn’t have done sth. B.可能（不）是may/might (not ) be; 可能已经（没）干某事may/might (not) have done sth. 3.情态动词与虚拟语气 A.本应该干某事（带有批评责备之意）should/ ought to have done sth.；本不该做了某事而做了shouldn’t /oughtn’t to have done sth B.本不必干某事needn’t have done sth. C.本可以干某事can/could have done sth. D.本（不会）干某事would (not) have done sth. E.真希望做过某事would like to have done sth. F.Should 在表建议的从句中： (a)It’s high time that sb. should do/did sth (b)It’s important sb. (should) do sth. (c)I suggest sb. (should ) do sth. 二、理解情态动词 Lucy is an outgoing lady. She can play many kinds of musical instruments. Actually, she could play the piano when she was 8 years old. Lucy also keeps taking exercise every day. She says that she has to do some sports because she must keep slim. “You shall get fat soon if you don’t take exercise every day.” She usually says to her friends. As for her, an elegant lady should try to keep fit. However, last week, she found that she might put on weight and she worried and decided to lose her weight. And these days she is always thinking that she may succeed soon if she tries all her best. However, she is always lack of time because she ought to take care of her children. One night after supper, she walked quickly in order to go dancing at the Tomorrow Park and she was late. On her way, she thought that the dancing must have