外研社必修四 module6 grammarmm

1、语法专题突破语法专题突破品味语法品味语法1When I got to the airport，they may have just left home.2Its surprising that you can drive. You must have learned it before.3There is nowhere to find them. Where can they have gone?4You neednt have taken a taxi here，for it was very near to my house.Shall:用于第一和第三人称疑问句用于第一和第三人称疑问句,

2、 表示征求对方的意见表示征求对方的意见,请求许可请求许可。Shall he come in?要他进来吗要他进来吗?Shall we go now?我们我们现在就走吗现在就走吗?Shall:用于第二和第三陈述句中用于第二和第三陈述句中,表示决心表示决心,强制强制,命令命令,警告警告,允诺等允诺等。The shares shall be divided into five parts according to the law. 根据法律这些股份将被分成五份根据法律这些股份将被分成五份。Will:表示客观规律表示客观规律Tomorrow will be Sunday.表示愿意：表示愿意：If you

3、 will wait, Ill call for you.明天将是星期日明天将是星期日。如果你愿意等如果你愿意等, 我就给你叫他我就给你叫他。表示临时决定表示临时决定-You have forgotten to turn off the light.-Really? I will go and turn it off.你忘记关灯了你忘记关灯了。真的吗真的吗？我这就去关上我这就去关上。 1. must have +done sth表示对过去事情的肯定推测，译成表示对过去事情的肯定推测，译成“一定一定做过某事做过某事”，该结构只用于肯定句。，该结构只用于肯定句。 2. ought to shoul

4、d have done sth.本应该做某事，而事实上并没有做。本应该做某事，而事实上并没有做。 1.You ought to / should have been more careful in this experiment.3. “shouldnthave done”本来不应该做某事，而实际做了。本来不应该做某事，而实际做了。1. 4. neednt have done sth本没必要做某事而做了本没必要做某事而做了I dressed very warmly for the trip, but I neednt have done so. The weather was hot.5. n

5、eedhave done”本来需要做某事而没有做。本来需要做某事而没有做。He need have hurried to the station. In that case，he wouldnt have missed the train.他本来需要快点去车站，那样的话，他就他本来需要快点去车站，那样的话，他就不会误了火车。不会误了火车。6“couldhave done”“本来能够做某事而没有做本来能够做某事而没有做”。He could have passed the exam，but he was too careless.本来他能够通过考试的，但是他太粗心了。本来他能够通过考试的，但是他太

6、粗心了。7“canthave done”“不可能做过某事不可能做过某事” 对过去事情的否定推测。对过去事情的否定推测。Mary cant have stolen your money. She has gone home.Mr.Smith cant have gone to Beijing，for I saw him in the library just now.4. would like to have done sth本打算做某事而没有做本打算做某事而没有做I would like to have read the article, but I was very busy then.情态

7、动词情态动词+ have +过去分词过去分词 表示否定的情态动词的用法表示否定的情态动词的用法:mustnt 不准；禁止不准；禁止 neednt 没必要没必要 ( = dont have to )cant 不能；不可能不能；不可能may not 不可以；可能不不可以；可能不shouldnt 不应该不应该 ( = ought not to )Function-1. Presentation1, 23unlikelyFUNCTION小结小结:may: 可能会可能会,或许会或许会might: 可能可能,或许或许(语气更不肯定语气更不肯定)unlikely: 可能性不大的可能性不大的(形容词形容词)1

8、.It may be a new species.它可能是一种新的物种它可能是一种新的物种。他他或许不在那儿或许不在那儿。2.He may not be there.语语气气强强 弱弱3. His suggestion might be worth thinking about.他的他的建议或许值得考虑建议或许值得考虑。我有我有许多或许你感兴趣的书许多或许你感兴趣的书。4. I have got a lot of books that might interest you.7点钟前她可能到不了点钟前她可能到不了。他他不大可能受伤不大可能受伤。5. She is unlikely to arri

9、ve before 7.6. It is unlikely that he got injured.Function-3. Practice(4m) Do activity 2 on page 54.1Think of more reasons why the dinosaurs might have disappeared.注注: word : word 文档文档点击此处链接点击此处链接Individual activity.用所给动词的适当形式填空用所给动词的适当形式填空1Your mother must _(wait) for you now.答案：答案：be waiting2You c

10、ould _(do)better，but you didnt try your best.答案：答案：have done3You shouldnt _(take) away my measuring tape，for I wanted to use it.答案：答案：have taken1. Could I borrow your dictionary? Yes, of course, you_. A. might B. will C. can D. should 答案答案C could表示委婉的语气，并不为表示委婉的语气，并不为时态。答语中时态。答语中of course，表示肯定的，表示肯定

11、的语气，允许某人做某事时，用语气，允许某人做某事时，用can和和 may来表达，不能用来表达，不能用could或或might。2. Shall I tell John about it?No, you _. Ive told him already. A. needntB. wouldnt C. mustntD. shouldnt答案答案A neednt 不必，不用。不必，不用。 wouldnt 将不将不, , 不会的。不会的。 mustnt 禁止、不能。禁止、不能。 shouldnt不应该。不应该。本题为不需要，不必的意思，应用本题为不需要，不必的意思，应用neednt。 3. Dont f

12、orget to come to my birthday party tomorrow._.A. I dont B. I wont C. I cant D. I havent 答案答案B will既可当作情态动词，表请既可当作情态动词，表请求、建议、也可作为实义动词表求、建议、也可作为实义动词表“意愿、意志、决心意愿、意志、决心”，本题表示，本题表示决心，选决心，选B。 25.The children lost in the woods; otherwise, they would have been at the lakeside camp as scheduled. （2013陕西）陕西）

13、 A. must have got B. must get C. should have got D. should get26. Why are your eyes so red? You _ have slept well last night. Yeah, I stayed up late writing a report. （2013辽宁）辽宁） A. cant B. mustnt C. neednt D. wont 其它情态动词小结其它情态动词小结:must have done:对过去或已完成的动作作出对过去或已完成的动作作出肯定肯定的推测的推测can/could not have done