(完整word版)初中英语语法专项习题11.情态动词.pdf

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1、情态动词讲义情态动词讲义I.情态动词的语法特征情态动词本身虽有词义，但只表示说话人的看法，命令，准许等；不能单独作谓语，须与实义动词构成谓语1）情态动词除ought to，have to，used to 外，其它情态动词后面只能接不带to 的不定式。2）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。3）情态动词没有非谓语形式，即没有不定式to，分词-ing,-ed 等形式。4）情态动词类别：can/cannot/can not/cant,may/may not,must/mustnt,shall/shall not/shant,should/shouldn t,ought to/

2、oughtn t to,will/won t,would/wouldn t.need/needn t,dare/daren t,used to/usednt to/didn t use to,have to/dont have to,had better/had better not,would rather/would rather not II.一些容易混淆的用法1.比较 can 和be able to 1）can/could 表示能力(born ability,learned ability),只用于现在式和过去式(could)。be able to 可以用于多种时态。People ca

3、n speak.He can speak English fluently.A computer cant think for itself.It must be told what to do.He said he could do the work by himself.cf:They will be able to tell you the news soon.他很快就能告诉你消息了。He said he would be able to get a passport soon.He had been able to speak a little Chinese before he ca

4、me to China.2）只用 be able to 表示经过努力或在一定条件下设法成功地做了某事时，而非能力，只能用was/were able to，不能用 could。-managed to do sth./succeeded in doing sth.He was able to flee Europe before the war broke out.=He managed to flee Europe before the war broke out.After two years of hard work,he was able to speak English.Although

5、 the driver was badly hurt,he was able to explain what had happened.With the help of the firemen,they were able to leave the burning house.3)could 不表示时态(1)提出委婉的请求，（注意在回答中不可用could）。-Could I have the television on?-Yes,you can./No,you cant.II.比较 have to 和must 1)两词都是 必须 的意思，have to 表示客观的需要，must 表示说话人主观

6、上的看法，既主观上的必要。My brother was very ill,so I had to call the doctor in the middle of the night.我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)I want to take more exercise,so I must walk to school every day.2）must 表示必须，必要，一种义务，责任，职责,命令等语气e.g.We must obey the school regulations.You must respect the old.You must come he

7、re early tomorrow.I am afraid I must be leaving.We must stay home,mustnt we?3）表示必然，必定,不可避免的结果Man must die.表示固执，一定要，坚持要e.g.Our three-year-old boy must do the opposite to what we ordered.Why must you interrupt me now and then while I am speaking.Must you shout so loudly?表示过去的不巧，偏偏e.g.Just when I was b

8、usy,the neighbor must come and chat.As I was sitting down to dinner,the telephone must ring.4）have to 有人称、数、时态的变化，而must 只有一种形式。e.g.He had to look after his sister yesterday.You will have to go there alone.5）must 问句的回答e.g.Must I wait until they come?-Yes,you must.-No,you neednt./don t have to/don t n

9、eed to Must we hand in our English exercise books today?-_./_ 6）在否定结构中：dont have to表示 不必 mustnt表示 禁止，不允许，带有很强的语气e.g.You dont have to tell him about it.你不一定要把此事告诉他。You mustnt tell him about it.你一定不要把这件事Cars mustn t be parked here.III.may 表示给予许可1)You may sit here.May I borrow your books?Might I have y

10、our telephone number?2)can/could 和 may/might.can 和 may 都可表示请求，或给与许可。Can 语气一般，could/may 比较礼貌，常用。对于can/could 的回答,一般是 can/can t,不可用 could，而对 may 的回答，则是 may/may not。-Could I use your legtop?-Yes,of course you can./Sorry,I am afraid you cant.-May I leave the classroom?-Yes,you may./No,you mustnt/you may

11、not/you don t have to.IV.情态动词 can,could,may,might,must表示推测的用法1)can/could(1).Can/could 用于疑问句表示猜测，可能,could 一般不表示时态，只表达委婉语气.Where is he now?Can he be reading in the library?Where can they have gone?(2).Can 可表示理论上的可能性或偶尔的可能。You can walk miles and miles through the forest without meeting anyone.He is ver

12、y clever boy,but he can be dull sometimes.Even experienced teachers can make mistakes.(3)can t/couldn t 表示不可能;Couldn t 一般不表示时态，只表达委婉语气.文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文

13、档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9

14、L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7

15、K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P

16、7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1

17、E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9

18、Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y5P7文档编码:CB2H1T1E9L9 HX7P10X9Q7K3 ZP8K3V6Y

19、5P7但在过去时态的宾语从句只能用couldn t.I believe him.He cant e such an irresponsible man.She can t have gone to school.We have no school today.I thought you couldn t have met her yesterday.2)may/might(1)may/might 用于肯定句，表示没有把握的推测；might 表示推测时，不表示时态,只是可能性比 may 小,但在过去时态的宾语从句只能用might.Peter may come with us tonight,bu

20、t he isnt very sure yet.He might be at home.It may have drizzled during the night.Philip may(might)have been hurt seriously in the car accident.(2)may not/mightnt 表示可能不，也许不。He may not know the truth.3）must must 用在肯定句中表示较有把握的推测，意为一定。You have worked hard all day.You must be tired.He must be working in

21、 his office.他一定在办公室工作呢。I didnt hear the phone.I must have been asleep.4)这些表示推测的情态动词使用时的时态构成（1）情态动词+动词原形。表示对现在或将来的情况的推测，此时动词通常为系动词。I dont know where she is,she may be in Wuhan.（2）情态动词+动词现在进行时。表示对正在进行的情况进行推测。At this moment,our teacher must be correcting our exam papers.这时，我们老师想必在批改试卷。（3）情态动词+动词完成时。表示对

22、过去情况的推测。The road is wet.It must have rained last night.地是湿的，昨天晚上一定下雨了。(4)情态动词+动词的现在完成进行时。表示对过去正在发生事情或一个完成进行的动作的推测。Your mother must have been looking for you.你妈妈一定一直在找你。5表示推测的情态动词语气的强弱肯定语气-由强至弱must may might 否定语气-由强至弱can t couldn t may not might not 疑问语气can 6)could have done 有两种含义。其一，表示本来有能力做但实际上没有；其

23、二，表示差点就，幸亏没，带有幸而没发生的语气。I could have walked to the station if I had known it was so near.You were stupid to throw the box out of the window.It could have hit someone.V.ought to,should 1)也可表示较大的可能性，（推测）文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3

24、HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 Z

25、O7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编

26、码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A

27、3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4

28、 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文

29、档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X1

30、0A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3If he started at six,he ought to/should be there now.It is nearly seven oclock now.Jack should be here at any moment.（应该，该）2）表示义务，责任,都为 应该 的意思，可用于各种人称。表示要求，命令时，语气由should（应该）、had better 最好）、must（必须）渐强。-Ought he to go?-Yes.I think he

31、ought to.We ought to/should listen carefully in class.You should be more careful in crossing the street.You ought to leave now if you dont want to miss the train.3）should 用于第一人称，表示说话人的谦逊，客气，委婉的语气You are mistaken,I should say.依我看，你是搞错了I should advise you not to do that.我倒是劝你别这样做。4）should 用于引导的条件从句中，表

32、示一件事听起来可能性很小，相当于“万一”Ask her to ring me up if you should see her.If you should change your mind,please let us know.Take a thick coat in case it should get/gets cold.5)用于动词 ask,advise,command,demand,insist,intend,recommend,request,require,suggest,urge,order 等之后的从句里，表示命令，忠告，要求，建议，(should)+do/be done.Th

33、e general ordered that his men(should)fire.The doctor urged that he(should)be operated on as soon as possible.He insisted that I should pay him the money.7)用于形容词之后的从句里，这样的形容词有important,essential,necessary,natural，用(should)+do/be done It is essential that every child should have the same educational

34、opportunity.8)why/how should.结构中，表示说话人对某事不理解，感到意外，惊异等意思，意为“竟会”Why should you be so late today?你今天怎么来得这么晚？-Where is Betty living?-How should I know?我怎会知道I don t know why you should think that I did it.我真不知道你凭什么认为这是。9）should/ought to have done 表示本应该做而事实上未做某事，否定句表示不该做某事而事实上做了。You ought to(should)have b

35、een more careful in this experiment.He ought not to have thrown the old clothes away.（事实上已扔了。）You shouldn t have cheated in the exam.ought to 在语气上比 should 要强。VI.need 的用法1）肯定句中作实义动词He needs to take a rest.He needs some time to think it over.The recorder needs repairing/to be repaired 否定句中，作情态动词和实义动词Y

36、ou needn t/don t need to do the exercise if you find it too easy.-Need we stay behind after school?-Yes,you must./No,you neednt-Do we need to stay behind after school?-Yes,we do/No,we don t 2)neednt have done sth本没必要做某事,但实际做了。I dressed very warmly for the trip,but I neednt have done so.The weather w

37、as hot.There was plenty of time.She neednt have hurried.You needn t have come to school.It is a holiday today.文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B

38、7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8

39、S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X

40、2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U

41、5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9

42、E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G

43、5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3Cf:needn t have done/d

44、on t need to I didn t need to go to school that day as it was Sunday.We needn t have brought a camera with us.He has got one.He said that he would bring a camera with him,so I didnt need to bring mine.VII.Dare 1)情态动词:dare/dared+do,否定形式为 dare not/dared not,用于疑问，否定，条件句中How dare you lay your hand on me

45、?Dared he leave without permission?I wonder how he dared say that to the teacher.He dare not walk alone at night.I dared not go any further.If you dare do such a thing,you will get into trouble.2)实义动词：dare+to do,有时态，人称和数量的变化；否定句，疑问句需用其他助动词的辅助,否定句中 to可省略。He dares to do anything./The little girl dares

46、 to speak before a large audience.I dare say he will fail.I wouldn t dare(to)interrupt him.He doesn t dare(to)walk alone at night.Does he dare to walk alone at night.He stood there,not daring to raise his head.VIII.shall,will 1)shall 用于疑问句，第一，三人称，表示愿意效劳以征求同意，或提出建议征询意见。Shall I carry the luggage for y

47、ou,Miss Li?Shall we have a meeting this afternoon?Someone is waiting for you?Shall he come in?2)用于第二，三人称陈述句中，可表示说话人给对方的命令，承诺，警告或恐吓等。Nothing shall stop us from doing good.Everyone shall fight to death.You shall fail if you don t work harder.He shall have the book when I finish reading.3)will(1)表示主语的愿

48、意,决心,承诺.If you will listen to me,I will help you.(2)表示物体的属性,或人或动物的习性.The door wont open.Oil will float on water.Fish will die out of water.The man will get angry over nothing.(3)表示没有固定时间的习惯.I will sometimes sit up late for exams sake.IX.used to would 1)都可表示过去习惯，但used to 强调过去经常或习惯于做某事，但现在已不做了，强调与现在的对

49、比，而 would 单纯就表示过去的习惯行为文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO

50、7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码:CT1G5X2X10A3 HG6L5U5B7L4 ZO7U9G9E8S3文档编码