ps2长寿游戏:高中英语语法大全2

第三章   动词的语态
一.概念:
动词的语态是动词的一种形式,表示主语和谓语之间语法或语义的关系.英语的语态有两种:主动语态和被动语态.主动语态用于主动句,表示主语是动作的执行者.被动语态用于被动句,表示主语是动作的承受者.主动语态的构成方式与动词时态相同,而被动语态由 助动词be+过去分词 构成,有人称,数,时态的变化.
一. 相关知识点精讲
1. let 的用法
1）当let后只有一个单音节动词，变被动语态时，可用不带to 的不定式。例如：
They let the strange go.他们放陌生人走了。
---> The strange was let go.
2）当let 后宾补较长时，let 通常不用被动语态，而用allow或permit 代替。例如：
The nurse let me go to see my classmate in the hospital. 那护士让我去探望住院的同学。
----> I was allowed / permitted to see my classmate in the hospital.
2.短语动词的被动语态
短语动词是一个整体，不可丢掉后面的介词或副词。例如：
My sister will be taken care of by Grandma. 我妹妹由奶奶照顾。
Such a thing has never been heard of before. 这样的事闻所未闻。
3. 表示"据说"或"相信" 的词组，基本上由believe, consider, declare, expect, feel , report, say, see, suppose, think, understand等组成。例如：
It is said that…　　 据说
It is reported that… 据报道
It is believed that…　大家相信
It is hoped that…　大家希望
It is well known that… 众所周知
It is thought that…　大家认为
It is suggested that…　据建议
It is taken granted that…　 被视为当然
It has been decided that… 大家决定
It must be remember that… 务必记住的是
4. 不用被动语态的情况
1） 不及物动词或不及物动词短语，如appear, die disappear, end（vi. 结束）, fail, happen, last, lie, remain, sit, spread, stand, break out, come true, fall asleep, keep silence, lose heart, take place等没有无被动语态。例如：
After the fire, very little remained of my house. 大火过后，我家烧得所剩无几。
比较：rise, fall, happen是不及物动词；raise, seat是及物动词。
要想正确地使用被动语态，就须注意哪些动词是及物的，哪些是不及物的。特别是一词多义的动词往往有两种用法。解决这一问题唯有在学习过程中多留意积累。
2） 不能用于被动语态的及物动词或动词短语，如fit, have, hold, marry, own, wish, cost, notice, watch agree with, arrive at / in, shake hands with, succeed in, suffer from, happen to, take part in, walk into, belong to等。例如：
This key just fits the lock. 这把钥匙只配这把锁。
Your story agrees with what had already been heard. 你说的与我们听说的一致。
3） 系动词无被动语态，如appear, be become, fall, feel, get, grow, keep, look, remain, seem, smell, sound, stay, taste, turn等。例如：It sounds good. 听上去不错。
4） 带同源宾语的及物动词如die/death, dream/dream， live/life等，以及反身代词，相互代词，不能用于被动语态。例如：
She dreamed a bad dream last night. 她昨晚做了个恶梦。
5） 当宾语是不定式时，很少用于被动语态。例如：
（对） She likes to swim.
（错） To swim is liked by her.
5. 主动形式表示被动意义
1）wash, clean, cook, iron, look, cut, sell, read, wear, feel, draw, write, sell等。例如：
The book sells well.　　这本书销路好。
This knife cuts easily.　 这刀子很好用。
2）blame, let（出租）, remain, keep, rent, build等。例如：
I was to blame for the accident. 事故发生了，我该受指责。
Much work remains. 还有许多活要干。
3） 在need, require, want, worth （形容词）, deserve后的动名词必须用主动形式。例如：
The door needs repairing.= The door needs to be repaired. 门该修了。
This book is worth reading.　这本书值得一读。
4）特殊结构：make sb. heard / understood （使别人能听见/理解自己）等。例如：
Explain it clearly and make yourself understood. 解释清楚些，让别人理解你的话。
6. 被动形式表示主动意义，如 be determined, be pleased, be graduated （from）, be prepared （for）, be occupied （in）, get married等。例如：
He is graduated from a famous university. 他毕业于一所有名的大学。
注意：表示同某人结婚，用marry sb. 或get married to sb.均可。例如：
He married a rich girl. 他与一个富妞结婚了。
He got married to a rich girl.
7.need/want/require/worth
当 need, want, require, be worth后面接doing时，表示的是被动意义。例如：
Your hair wants cutting.　你的头发该理了。
The floor requires washing. 地板需要冲洗。
三.巩固练习
1. I___________ (teach) here for ten years since I finished school.
2. Would you mind me __________ (use) your bike?
3. The students of Class Two___________ (sweep) their classroom now.
4. The Whites____________ (not listen) to the radio at that time.
5. It's better to give than__________ (receive).
6. How long ______you_______ (live) in this town?
7. You _______ (come) here last year, ______ you?
8. ----When ______ you______ (see) him?
----I______ (see) him last Sunday.
9. She said that the car___________ (use) the next week.
10. I didn't know what __________ (happen) to China in a century.
11. When I got to the station, the train ____ already ______ (leave).
12. The stone bridge______________ (build) in our hometown for ten years.
13. The desk must ______ (clean) once a day.
14. The dog _________ (lie) on the floor when I came in..
15. It _________(rain) heavily when I got home.
16. Her mother____________ (cook) at this time yesterday.
17. The students _____________ (do) their homework.   __________ (not make) any noise!
18. ----______ you ever_______ (be) to Beijing?  ----Yes. I________ (go) there last week.
19. He'll telephone us as soon as he _________ (arrive) there.
20. Jiefang trucks____________ (make) in Changchun.
21. A pen is used for__________ (write).
22. All that must ________ (do).
23 .My friend can't decide which pair of trousers____________ (choose). So she asked me to go shopping with her.
24. They find it useful__________ (learn) English.
25. The old man often_________ (tell) the children a story in the evening. This evening he ________ (tell) two stories.
26. The radio__________ (use) once in a week in our class.  It____________ (not use) yesterday because there was something wrong with it.
27. Would please tell us how___________ (make) the watch ________ (work)?
28. She doesn't know what_________ (do) and where__________ (go).
四.答案
1.     have taught
2.     using
3.     are sweeping
4.     weren’t listening
5.     to receive
6.     have … lived
7.     came … didn’t
8.     did … see, saw
9.     would be used
10.  would happen
11.  had … left
12.  have been built
13.  be cleaned
14.  was lying
15.  was raining
16.  was cooking
17.  are doing, Don’t make
18.  have … beeen, went
19.  arrives
20.  are made
21.  writing
22.  be done
23.  to choose
24.  to learn
25.  tells, will tell
第四章  动词的语气
一.概念
语气有三种:陈述语气,祈使语气和虚拟语气.语气表示说话人对劝词所示示的动作或所处的状态持有的态度或看法.
二.相关知识点精讲
1.辨别if 引导真实条件句和if引导的虚拟条件句的区别
If he has time, he will go with us.= Probably he has time and will go with us.
If he had time, he would go with us.=But in fact he has no time.
2.虚拟条件句中主句和从句的谓与动词构成形式如下表
if条件句中的谓与动词
主句的谓与动词
与现在的事实相反
1. 行为动词用did 形式
2. be动词用were
should
would
could   + 动词原形
might
与过去的事实相反
had + done
should
would
could   + have + done
might
与将来的事实相反
1. 行为动词用did
2. should + 动词原形
3. were to + 动词原形
should
would
could   + 动词原形
might
3.混合时间的虚拟语气
如果条件句中的动作和主句的动作不是同时发生，主句和从句的谓语动词的形式应分别根据各自所表示的时间加以调整。
1)0If I had received the passport yesterday, I would start today.
2)If he had telephoned me last night, I would see him now.
3)If he had followed the doctor’s advice, he would be all right now.
4)If China had not been liberated, the working people would still be leading a miserable life.
4.should/ could / might/ ought to + have done 表示“过去本应该/可以做而实际上却没做”
needn’t have done 表示“过去没必要作而实际上做了”
5.虚拟语气中的倒装句
如果虚拟语气的条件从句谓语动词中含有were, had, could, should，有时可将if省去，而将条件从句的主语置于were, had, should, could 之后。
Had you invited us, we would have come to your party.
Were I you, I would do more practice after class.
Could she lend us a helping hand, she would do so.
6.wish 后面的宾语从句的谓语动词应使用虚拟语气，表示“可惜…；….就好了； 悔不该…； 但愿…。”
主句谓语
从句谓语
wish
时态
谓语动词的形式
现在时
表示与wish同时发生
动词用过去时
be动词用were
过去时
表示在wish之前发生的动作
动词用had done
be用had been
将来时
表示在wish之后发生的动作
动词用would do; should do
be 用 would be ; should be
1)I wish I knew the key to the answer.
2)I wish I were ten years younger.
3)I wish that I had gone to the football match last week.
4)I wish that you had been here yesterday.
5)He wishes that we would visit the old school.
7.表示命令或建议动词suggest, insist, propose, desire, demand, request, order, command 后的宾语从句中应使用虚拟 should +动词原形； should 不可用would 来替代; 主句所使用的动词时态不限。
8.suggest 为“建议去做…; 命令…”从句用should + do
为“ 说明； 暗示”, 从句用过去时或过去完成时。
1) The doctor suggested that I should take the medicine three times a day.
2) The doctor suggested that my grandmother had caught a bad cold.
9.insist “坚持要去做…，坚持应该去做”，从句用should + do为“坚持表明，坚持说/解释”， 从句用过去时或过去完成时。
10.虚拟语气也用于表语从句和主语从句中，表示间接的命令、要求、请求、建议、决定等，主句的主语通常是suggestion, proposal, request, order, idea 等。表语从句中的谓语动词是should +动词原型，should 可以省略。
11.在主语从句中，当从句用来表示惊奇、不相信、惋惜等，从句的谓语动词用需拟语气形式。其谓语动词时should + 动词原型， 或should 省略。
三.巩固练习
1. If there were no subjunctive mood, English _________ much easier.
A. will be                  B. would have been
C. could have been      D. would be
2. If I _____ you, I’d join the army.
A. am       B. was          C. were         D. would be
3. If he _______ tomorrow, he would find Mr Wang in the office.
A. comes        B. will come        C. should come      D. come
4. If it _______ next week , the crops would be saved.
A. rains        B. will rains       C. would rain           D. should rain
5. If I _______ it, I would do it in a different way.
A. were to do       B. do       C. had done         D. was to do
6. Supposing the weather ________ bad, where would you go ?
A. is           B. will be          C. were         D. be
7. If he had worked harder, he _________.
A. would succeed            B. had succeeded
C. should succeed           D. would have succeeded
8. If he ________, he _________ that food.
A. was warned; would not take
B. had been warned; would not have taken
C. would be warned; had not taken
D. would have been warned; had not taken
9. If my lawyer _________ here last Saturday, he _______ me from going.
A. had been; would have prevented
B. had been; would prevent
C. were; would prevent
D. were; would have prevented
10. If he ______ it, he _______ it.
A. had seen; could have believed        B. saw; couldn’t believe
C. saw; couldn’t have believed     D. has seen; had believed
11. —Do you think the thief entered through the window?
—No, if he had, I don’t believe, _______ broken the living-room’s window.
A. he would have            B. he must have
C. he had                   D. should he have
12. —Did you go swimming last Sunday?
—No. We would have gone ______ nicer.
A. if the weather was
B. would the weather have been
C. had the weather been
D. should the weather be
13. ______ it ______ for your help, I couldn’t have made any progress.
A. Had; not been            B. Should; not been
C. Did; not been            D. Not; been
14. _______ today, he would get there by Friday.
A. Would have left          B. Was he leaving
C. Were he to leave     D. If he leaves
15. It is ordered that a new bridge ______ over the wide river.
A. should be built      B. would built
C. will be built            D. built
四.答案
1.D  2.C  3.C  4.D  5.A  6.C  7.D  8.B  9.A  10.A  11.D  12.C  13.A  14.C  15.A
第5章  助动词
一.概念:
助动词是帮助主要动词构成各种时态,语态,语气以及否定或疑问结构的动词.助动词分为时态助动词和结构助动词两种.
二.相关知识点精讲:
1. 助动词be的用法
1） be +现在分词，构成进行时态。例如：
They are having a meeting.　他们正在开会。
English is becoming more and more important. 英语现在越来越重要。
2）　be + 过去分词，构成被动语态。例如：
The window was broken by Tom..　窗户是汤姆打碎的。
English is taught throughout the world.　世界各地都教英语。
3） be + 动词不定式，可表示下列内容：
a. 表示最近、未来的计划或安排。例如：
He is to go to New York next week..　他下周要去纽约。
We are to teach the freshmen.　我们要教新生。
说明： 这种用法也可以说成是一种将来时态表达法。
b. 表示命令。例如：
You are to explain this.　对此你要做出解释。
He is to come to the office this afternoon.　要他今天下午来办公室。
c.　征求意见。例如：
How am I to answer him?　我该怎样答复他？
Who is to go there?　谁该去那儿呢？
d. 表示相约、商定。例如：
We are to meet at the school gate at seven tomorrow morning.　我们明天早晨7点在校门口集合。
2. 助动词have的用法
1）have +过去分词，构成完成时态。例如：
He has left for London.　他已去了伦敦。
By the end of last month, they had finished half of their work.　 上月未为止，他们已经完成工作的一半。
2）have + been +现在分词，构成完成进行时。例如：
I have been studying English for ten years. 我一直在学英语，已达十年之久。
3）have +been +过去分词，构成完成式被动语态。例如：
English has been taught in China for many years. 中国教英语已经多年。
3.助动词do 的用法
1）构成一般疑问句。例如：
Do you want to pass the CET?　你想通过大学英语测试吗？
Did you study German?　你们学过德语吗？
2）do + not 构成否定句。例如：
I do not want to be criticized.　 我不想挨批评。
He doesn't like to study.　 他不想学习。
In the past, many students did not know the importance of English.
过去，好多学生不知道英语的重要性。
3） 构成否定祈使句。例如：
Don't go there.　不要去那里。
Don't be so absent-minded.　不要这么心不在焉。
说明： 构成否定祈使句只用do，不用did和does。
4）放在动词原形前，加强该动词的语气。例如：
Do come to my birthday party.　一定来参加我的生日宴会。
I did go there.　我确实去那儿了。
I do miss you.　我确实想你。
5）用于倒装句。例如：
Never did I hear of such a thing.　 我从未听说过这样的事情。
Only when we begin our college life do we realize the importance of English. 进了大学以后，我们才认识到英语的重要性。
说明： 引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等。
6）用作代动词。例如：
---- Do you like Beijing?　--你喜欢北京吗？
---- Yes, I do.　--是的，喜欢。（do用作代动词，代替like Beijing.）
He knows how to drive a car, doesn't he? 他知道如何开车，对吧？
4. 助动词shall和will的用法
shall和will作为助动词可以与动词原形一起构成一般将来时。例如：
I shall study harder at English.　 我将更加努力地学习英语。
He will go to Shanghai.　　他要去上海。
说明：在过去的语法中，语法学家说shall用于第一人称，will 只用于第二、第三人称。现在，尤其是在口语中，will常用于第一人称，但shall只用于第一人称，如用于第二、第三人称，就失去助动词的意义，已变为情态动词，试比较:
He shall come.　他必须来。（shall有命令的意味。）
He will come.　他要来。（will只与动词原形构成一般将来时。）
5.助动词should, would的用法
1）should无词义，只是shall的过去形式，与动词原形构成过去将来时，只用于第一人称。例如：
I telephoned him yesterday to ask what I should do next week. 我昨天给他打电话，问他我下周干什么。
比较："What shall I do next week?" I asked. "我下周干什么？"我问道。
可以说，shall变成间接引语时，变成了should。
2） would也无词义，是will的过去形式，与动词原形构成过去将来时，用于第二、第三人称。例如：
He said he would come.　 他说他要来。
比较："I will go," he said. 他说："我要去那儿。"变成间接引语，就成了He said he would come。原来的will变成would，go变成了come.。
6. 短语动词
动词加小品构成的起动词作用的短语叫短语动词。例如：
Turn off the radio.　把收音机关上。（turn off是短语动词）
短语动词的构成基本有下列几种：
1）动词+副词，如：black out；
2）动词+介词，如：look into；
3）动词+副词+介词，如：look forward to。构成短语动词的副词和介词都统称为小品词
三.巩固练习
1.If it is fine tomorrow, we ______ a football match.a. have    b. will have    c. has     d. shall has2.When he was at school, he ______ early and take a walk before breakfast.a. will rise   b. shall rise   b. should rise    would rise3.In the past 30 years China ______ great advances in the socialist revolution and socialist construction.a. has made   b. have made   c. had made   d. having made4.I ______ go to bed until I ______ finished my work.a. don’t/had   b. didn’t/have    c. didn’t/had    d. don’t/have5.______ you think he ______ back by dinner time?a. Do/have come   b. Did/will have come    c. Does/will come    d. Do/will have come6.He said that he dropped his bag when he ______ for the bus.a. was runing   b. was running   c. were running   d. is running7.No sooner ______ he arrived home than he ______ to start on another journey.a. has/was asked   b. have/were asked   c. had/is asked   d. had/was asked8.“______ you give me a room for the night?” I asked on arriving at the hotel.a. Should   b. Can   c. Might   d. May9.There are nine of them, so ______ get into the car at the same time.a. they may not at all  b. all they may not   c. they can’t all  d. all they can’t10.“We didn’t see him at the lecture yesterday.” “He ______ it.”a. mustn’t attend            b. cannot have attended c. would have not attended   d. needn’t have attended11.“You realize that you were driving at 100 mph, don’t you?” “No, officer. I ______. This car can’t do more than 80.”a. didn’t need to be   b. may not have been   c. couldn’t have been  d. needn’t have been12.he was a good runner so he ______ escape from the police.a. might   b. succeeded to   c. would    d. was able to13.If they ______, our plan will fall flat.a. are co-operating  b. had not co-operated  c. won’t co-operate  d. didn’t co-operate14.I hoped ______ my letter.a. her to answer  b. that she would answer  c. that she answers   d. her answering15.He ______ live in the country than in the city.a. prefers  b. likes to   c. had better    d. would rather16.______ to see a film with us today?a. Did you like   b. Would you like   c. Will you like   d. Have you liked17.I’m sorry, but I had no alternative. I simply ______ what I did.a. must do   b. had to do   c. ought to have done    d. have to do18.“Time is running out,______?”a. hadn’t we better got start    b. hadn’t we better get startc.hadn’t we better get started  d. hadn’t we better not started19.No one ______ that to his face.a. dares say   b. dares saying    c. dare say    d. dare to say20.The students in the classroom ______ not to make so much noise.a. need   b. ought    c. must    d. dare21.You ______ last week if you were really serious about your work.a. ought to come   b. ought to be coming   c. ought have come    d. ought to have come22.The elephants ought ______ hours ago by the keepers.a. to be fed   b. to feed    c. to being fed    d. to have been fed23.“I wonder why they’re late.” “They ______ the train.”a. can have missed   b. could miss   c. may have missed    d. might miss24.“Tom graduated from college at a very young age.”  “He ______ have been an outstanding student.”a.       must   b. could   c. should   d. might25.You ______ the examination again since you had already passed it.a. needn’t have taken  b. didn’t need to take   c. needn’t take   d. mustn’t take26.He is really incompetent! The letter ______ yesterday.a. should be finished typing    b. must be finished typingc.must have finished typing    c. should have been finished typing27.The boy told his father that he would rather ______ an astronaut.a. become    b. to become    c. becoming    d. became28.When we reached the station, the train had still not arrived; so we ______.a. needed not to hurry         b. needn’t have hurried    c. need not to have hurried     d. didn’t need to hurry29.Since your roommate is visiting her family this weekend,_____ you like to have dinner with us tonight?a. will   b. won’t   c. wouldn’t    d. do30.He was afraid what he had done ______ a disastrous effect on his career.a. might have    b. could be    c. have been   d. shall be四.答案
1-10 BDACDBDBCB  11-20  CDCBDBBCCB   21-30  DDCABDABCA 第六章  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．can
1)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。
Fire 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）。
A horse in the center of London can cost a lot of money.
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。
2)表过去的能力
I could swim when I was only six.
我刚六岁就能游泳。
Could在肯定句中表示过去的能力时，常表抽象的一般的能力。
He could be very naughty when he was a child.
他小时候会是很顽皮的。
3)表“允许”。可表示委婉客气的提出问题或陈述看法
Could I use your bike?
Yes, you can.
他会记得那时吗?
I’m afraid I couldn’t give you an answer today.
恐怕我今天不能回答你。
The teacher said you could go to the store for sweets.
老师说你可以去商店买糖。
3)Could/can+have done 结构表示对过去发生的事情的“怀疑”或“不肯定”。 could 加完成式还用于肯定句时一般表过去可能完成而却未完成的动作。
Can they have won the basketball match？
他们赢了那场篮球赛吗？
What you referred to just now can have made her very sad.
你刚刚所谈到的可能令他很伤心。
You could have completed the task a little earlier.
你本来能早点完成任务的。（但事实上并没有提前完成任务）
I could have passed my examination easily but I made too many stupid mistakes.
我本可以轻易通过考试，但我犯了太多不该犯的错误。
如表具体做某一件事的能力时，则须用 be able to .
He was able to translate the article without a dictionary.
他可以不用词典翻译那篇文章。
Can表示一贯的能力 ，be able to表示客观能力和通过努力可以达到的能力
I can’t swim. But I am sure I will be able to swim through more practicing.
The fire spread through the hotel, but everyone was able to get out
When the boat sank he was able to swim to the bank
3.may 的用法
1)表示请求、可以、允许。
You may drive the tractor. 你可以开那台拖拉机。
2)当回答由may 引起的问题时，否定答语要用must not,表示“不许可”、“不应该”、“不行”。
May I come in?
Yes, you may.
No,you can’t
No, you may not .
No ,you mustn’t
No ,you’d better not.
3) may /might 推测性用法 可能
He may be right.
He may not come today  (可能不)
He may /might come tomorrow.
, 注意: 1只用于肯定和否定句中,不用于疑问句中。
2 might 比may可能性更小
He might get a job.
He may get a job.
3 may no 可能不  can not不可能
He may not come
He can’t come
3)表建议（可和as well 连用）
You may（might）as well stay where you are.
你还是原地待着好。（may as well 有“还是……的好”的含义）
4)表祝愿
May you be happy!
might
1)表过去的“可能”和“允许”多用于间接引语。
She said that he might take her dictionary.
她说他可以拿她的词典去用。
除在间接引语中外，might一般不表示过去的“可能”与“许可”。表过去的“可能”可用could，表过去的“许可”可用were (was) allowed to。
2)表现在的“可能”，其可能性要比may小。
Electric irons could be dangerous; they might give you a severe shock.
电熨斗会有危险，它可能电着人。
3)may (might) + have +done 表示对过去发生行为的推测，含有“想必”、“也许是”的意思。
It may have been true. 这事也许是真的。
He might not have settled the question. 他可能尚未解决那个问题。
4.must 的主要用法。
1)表示必须、必要
We must do everything step by step .我们必须按部就班地做一切事情。
Why must you always bother me? 为什么你偏要打扰我呢。
2)must be + 表语的结构，通常表示猜测，含有“一定”之意。（只用在肯定句中）
He must be an honest boy. 他一定是个诚实的男孩。
This must be your room. 这一定是你的房间。
3)must 的否定式有两个：当回答由must引起的问题时，否定答复要用needn’t或don’t have to 表示“不必”、“无须”、“用不着”、“不一定”的意义。当表示“不应该”、“不许可”、“禁止”时，就用must not。
Must I go tomorrow?明天我必须去吗？
Yes, please.是的，请吧！
No , you needn’t. 不，你不必去。
4)must +have +过去分词的结构，常用在肯定句中，表示对过去发生行为的推测，含有“一定”、“准是”的意思。否定和疑问句用can。
She must have studied English before.她以前一定学过英语。
5.have to的含义与must是很接近的,只是have to 比较强调客观需要，must着重说明主观看法。
I must clean the room.（主观想法）
I have to clean the room.（客观需要）
另外，have to 能用于更多时态：
We had to be there at ten .我们得在十点钟到那里。
We will have to reconsider the whole thing.
这一切我们将不得不重新加以考虑。
have to 的否定式：don’t have to do 表示“不必做……”之意。
6.ought to 的用法
Ought to 后接动词原形，表义务，但不及must 那样具有信心，如：
You don’t look well. You ought to go to see the doctor.
你气色不好，应该去看病。
Ought to 用于否定句，其否定形式可缩略为oughtn’t ，如：
You oughtn’t to smoke so much. 你不应该抽这么多烟。
也可以用于疑问句，如：
Ought you to smoke so much?你应该抽这样多烟吗？
Ought to 在间接引语中表过去时形式不变，如：
He said you ought to tell the police.
他说你应该去报告警察。
7.shall的用法
1)用于第一人称征求对方的意见，如：
What shall I wear on the journey? 我路上穿什么好呢？
Shall we dance? 我们跳舞好吗？
2)shall 用于第二、三人称时表允诺，警告，命令，威胁（现已少见），如：
She shall get her share. 她可以得到她的一份。
You shall have it back tomorrow.你明天可以将它拿回。
情态动词should一般不应被认为是情态动词shall的过去式，主要用法有：
1)用于第一人称疑问句中询问对方的意愿，但语气较委婉温和，如：
What should we do now? 我们现在该怎么办？
2)表示应该、必须，常与must 换用。例如：
We should (must) master a foreign language at least.
我们应当至少掌握一门外语。
3)“should+be+表语”的结构，表示推测或惊奇。例如：
They should be back by now. 他们现在应该回来了吧。
I am sorry that she should be so careless. 我感到遗憾她竟会那样粗心。
4)“should+have+过去分词”的结构，表示过去该做而实际上尚未做的动作或行为；其否定则表示发生了不应该发生的行为。其同义结构“ought to have +过去分词”,表示过去“早应该”、“本当”之意，语气较强。例如：
I should have thought of that. 这一点我是应当想到的。（但没想到）
They should not have left so soon.他们不应当走得这么早。（但已走了）
5) 在“It is natural (strange, natural, necessary, surprised, impossible, important ) that……”句型中，主语从句中的谓语动词要用should +动词原形”表示“理所当然”、“奇怪”、“必要”、“惊异”等的意思。在lest（以免）、for fear (that) (以防)、in case（以备万一）等之后也要用should+动词原形;在advise, sugest, order, demand, request 等的从句中should+do”例如：
It is necessary that he(should) be sent there at once.
有必要马上派他到那里去。
It is strange that he should say so. 他会说这样的话真是奇怪。
Let us go at once lest we should be late for the train.
我们马上走吧，以免赶不上火车。
8..will和would的用法
1）表示意志，决心或愿望。例如：
Surely we will support all the people in the world in their struggle for peace.
我们一定要支持全世界人民争取和平的斗争。
He would not let me try it . 　他不肯让我去试。
2）will表示经常性、习惯性、倾向性，would表示过去的习惯行为。
He will sit there hour after hour looking at the traffic go by.
他会经常一连几个小时坐在那儿观看来往的车辆。
He would come to see me when he was in Beijing.
他在北京时，常来看望我。
3）用于第二人称作主语的疑问句中，表示对对方的请求，would的语气比will委碗
Would/will you kindly tell me the way to the station? 请问到火车站怎么走？
4）表可能性
This will be the book you are looking for.
这可能就是你要找的书。
She eould be about 60 when she died.
他死时大概60岁。
9. need和dare的用法
情态动词need               实义动词 need
现     You need (not) do      You (don’t) need to do
在
时     He need (not) do       He needs (doesn’t need) to do
过                            You needed (didn’t need) to do
去
时                            He needed (didn’t need) to do
将    You need (not) do       You will (not) need to do
来
时    He need (not) do        He will (not) need to do
句型    时态                     动词
情态动词dare           实义动词 dare
肯定句  现在时  dare to 少用           dare/dares to do
过去时  dare to 少用           dared to do
否定句  现在时  daren’t/dare not do    do/does not dare (to) do
过去时  dared not do           did not dare (to) do
疑问句  现在时  Dare he do?             Do you/Does he dear (to) do?
过去时  Dared he do?           Did he dare (to) do
needn’t have v-ed 表示过去做了某事，但没有做的必要， 意为“本没必要…”。例如：
You needn’t have waken me up; I don’t have to go to work today
10.表推测的情态动词句子的反意疑问句
He must/may be in the room, isn’t he?
He can’t be in the room, is he？
He must have finished the work, hasn’t he?
He may have done the work last night, didn’t he?
：情态动词+行为动词进行式
情态动词+行为动词进行式（即情态动词+ be + v-ing形式），表示推测或评论某动作现在是否正在进行。例如：
1）He must be playing basketball in the room.
2）She may be staying at home.
11.情态动词+行为动词完成进行式
情态动词+行为动词完成进行式（即情态动词+ have been + v-ing 形式），表示推测或评论过去某动作是否正在进行或一直在进行。例如：
1）They should have been meeting to discuss the problem.
2）He may / might have been buying stamps in the post office when you saw him.
12.used to +v, be used to +v-ing和be used to +v
（1）used to +v意为“过去常常”，“过去一直”；be used to +v-ing / n（名词）意为“习惯于”；be used to +v意为“被用来（做某事）”。
（2）used to只表示过去，而be used to +v-ing / n可表示现在、过去或将来。例如：
1）He used to smoke. Now he doesn’t.
2）He’s quite used to hard work / working hard.
3）The knife is used to cut bread.
13．用作情态动词的其他短语
would rather, would sooner, would (just) as soon, had rather, had better, had sooner, can not but, may (just) as well等可用作情态动词。例如：
1）The soldier would sooner die than surrender.
2）The brave soldier would as soon die as yield to such an enemy.
3）I’d rather walk than take a bus.
4）If you don’t like to swim, you may just as well stay at home.
注：这些短语后一般直接跟动词原形.would (had) rather, would (had) sooner, would (just) as soon后可跟that 引导的从句，that 常省去，从句要用虚拟语气。对现在和将来的假设用过去时，对过去的假设用过去完成时。例如：
1）I would rather you came on Sunday.
2）I would sooner you hadn’t asked me to speak yesterday.
二. 巩固练习:
1. _____ you ready?
(A)     Are (B) Have     (C) Will     (D) Can
2. ____ here early?
(A)     Will he   (B) Was he  (C) Did he be  (D) Were he
3.       I ___ happy about the price of eggs.
(A) am't  (B) am not  (C)         do not   (D) won’t
4.       Since last year I____ him only once.
(A)     have seen  (B) have been seeing  (C)        see  (D) was seeing
5.       Donald ___ sixteen tomorrow.
(A)     is being  (B) going to be          (C)      shall be  (D) will be
6.       I ___ the story at all.
(A) don't like           (B) like (C)      am fond of       (D) would like
7.       I would rather ___ than play now.
(A) to study             (B)am studying            (C)      study    (D) studied
8.  I'd rather you ___ anything about it for the time being.
(A)  do  (B) didn't do  (C)      don't              (D) didn't
9. The car___much money.
(A)     not cost (B) not have cost (C)      isn't cost       (D) didn't cost
10. I ___ like to eat fish.
(A) am  (B) have  (C) do (D) be
11. ___ repeat the question?
(A)      Shall I  (B) Will I  (C)Would you like that I (D) Do you want that I
12.      My teacher knows more than ___.
(A)     my uncle knows   (B) my uncle does
(C)    they know              (D)they don't know
13.      He___to meet us at the station, but didn't see us.
(A)     did go  (B) did went  (C) goes  (D) had
14.      Not only ____us light.
(A)     does the sun give  (B) the sun gives
(C) gives the sun      (D) the sun does give
15.      ____ you tell me what has happened?
(A) May   (B) Must  (C) Can  (D) Could
16.      Anne___tomorrow.
(A) can sing  (B) can to sing  (C) is going sing  (D) going to sing
17.      You___hand it in at once, you may hand it in tomorrow.
(A)     needn't  (B) may not  (C) can't  (D) must not
18.      Tell the boy that he ___ in the river.
(A) swims  (B) swim  (C) swimming  (D) to swim
19.      Joan___play on Saturday.
(A) going to  (B) can  (C) is going  (D) can to
20.      Susan and I can go to the lecture ___.
(A)    but neither can Charles  (B) and so Charies can
(C)      but Charles can't     (D) and Charles also can
四.答案
1.       (A)      2,       (B)      3.       (B)      4.       (A)      5,       (D)      6,       (A)      7.         (C)      8.       (B)      9.       (9)      10,      (C)
11.      (A)      12.      (B)      13.      (A)      14.      (A)      15.      (D)      16.      (A)     17.         (A)      18.      (B)      19.      (B)      20,      (C)