必修3Unit1情態(tài)動詞改

1、modal verbmodal verb情態(tài)動詞表說話人的某種感情情態(tài)動詞表說話人的某種感情或語氣，對某一動作或狀態(tài)的或語氣，對某一動作或狀態(tài)的某種態(tài)度。表示某種態(tài)度。表示“需要、可以、需要、可以、必須、應(yīng)當(dāng)必須、應(yīng)當(dāng)”等。等。 情態(tài)動詞情態(tài)動詞 ( modal verbs)情態(tài)動詞有一定的意義，但沒有人稱和數(shù)的情態(tài)動詞有一定的意義，但沒有人稱和數(shù)的變化，不能獨立使用，它和后面的動詞構(gòu)成變化，不能獨立使用，它和后面的動詞構(gòu)成謂語謂語只作情態(tài)動詞的只作情態(tài)動詞的can/could, may/might, ought to， must可情態(tài)可實義的可情態(tài)可實義的need, dare可情態(tài)可助動詞的

2、可情態(tài)可助動詞的shall/should, will/would相當(dāng)于情態(tài)動詞的相當(dāng)于情態(tài)動詞的have to, used to1) Some of us can use the computer now, but we couldnt last year.2) The new-built theatre can seat 1500 people.3) Can she be in the computer center?4) I thought what he said could not be true.5) Can/Could I use your dictionary?6) Could

3、you lend me a hand?1. 1.表能力表能力3. 表示表示“請求請求” “允許允許”(表請求時，口語中常用表請求時，口語中常用 could 代替代替 can 使語氣更委婉，回答時用使語氣更委婉，回答時用can)2. 表示推測表示推測 “可能可能”，can只用于疑否句，只用于疑否句，could不限不限1. can 與與could4. 表示表示“許可許可”，可與，可與may 換用。換用。You can go home now.5. can 用于疑問句或否定句中時，表驚異、用于疑問句或否定句中時，表驚異、不相信等，意思是不相信等，意思是“可能、能夠可能、能夠”。How can you

4、 say that you really understand the wholestory if you have covered only part of the article?How can you be so selfish?6. can 用于陳述句，表用于陳述句，表“有時會有時會”“”“有些會有些會”。Boys can be beautiful and girls can be very naughty.Shanghai can be very cold in March.2. may 與與might1. 表示表示“許可許可”或或“請求請求”，有，有“可以可以”的意思，口語中的意思

5、，口語中 常用常用 might 代代 may ,表示委婉語氣。表示委婉語氣。 否定回答時用否定回答時用“must not”表表“禁止，阻止禁止，阻止”.Eg: - May I watch TV after supper? - Yes, you may. / No, you mustnt. 2. 表示可能性。表示可能性。 意為意為“或許，可能或許，可能” might 比比 may 可能性小。對現(xiàn)在或?qū)聿聹y?？赡苄孕　ΜF(xiàn)在或?qū)聿聹y。Eg: 1) It might be true. 2) They may be in the library now.3) They may come here

6、tomorrow. may/ might as well + 動詞原形動詞原形 “還是還是的好的好”， “不妨不妨” Eg: You may as well go and have a look.4. May you +動詞原形動詞原形 表表“希望、祝愿、祈求希望、祝愿、祈求” “祝你祝你”Eg: May you succeed.Make 2 sentences by yourselves with “may you”.3. must1. 表示義務(wù)或強烈的勸告，意為表示義務(wù)或強烈的勸告，意為“必須必須”“”“應(yīng)該應(yīng)該”， 其其否定式否定式表示表示“不應(yīng)該不應(yīng)該”“”“不許可不許可” “不準(zhǔn)不準(zhǔn)

7、”“”“禁止禁止”。Eg: 1) You must finish your homework first. 2) Children mustnt speak like that to their parents.2. 回答回答 must 所在的一般疑問句時，否定回答用所在的一般疑問句時，否定回答用 “neednt” “dont have to”.Eg: -Must we finish the work tomorrow? -No, you neednt/ dont have to, but you must finish it in three days.3. 對對現(xiàn)在現(xiàn)在進行推測，用于進行推

8、測，用于肯定句，意為肯定句，意為“一定一定”“”“務(wù)必務(wù)必”。Eg: 1) Betty must be in the next room. 2) He must be watering the flowers in his garden. 4. 表不滿或指責(zé)，用于肯定句或疑問句，意為表不滿或指責(zé)，用于肯定句或疑問句，意為“非非得得”“”“必定會必定會”。1) If you must smoke, please go outside.2) My car must break down whenever Im in a hurry.3) Must you spit on the floor? Th

9、e toilet is so near!陷阱提示must: 1. mustnt只表示只表示“不可以，不許不可以，不許”； 不不表示表示猜測猜測“一定不會一定不會”！(cant) 2. must 只對只對現(xiàn)在現(xiàn)在表猜測表猜測，不，不對對將來將來猜測！猜測！can 表表猜測猜測只用于只用于疑問句否定句中！疑問句否定句中！ 用于用于陳述句陳述句表示的是：表示的是：有時會！有時會！may/might 1. 表表猜測猜測既可用于既可用于肯定句，肯定句， 也可用于也可用于否定句；否定句； 2. 可對可對將來將來猜測猜測真題演練真題演練1.-I dont really like James. Why did

10、 you invite him? -Dont worry. He _come. He said he wasnt certain what his plans were.(11北京）北京） A. must not B. need not C. would not D. might notD2. It _ be the postman at the door. Its only six oclock. (2011江西卷）江西卷） A. mustnt B. cant C. wont D. needntB3. It is usually warm in my hometown in March, b

11、ut it _ be rather cold sometimes.(08福建）福建） A. must B. can C. should D. would B3. I have told you the truth. _ I keep repeating it? （10江西）江西） A. Must B. Can C. May D. Will A3. will 與與would 1. 表表“請求、建議請求、建議”等，用等，用 would 比用比用will 委婉，客氣些委婉，客氣些Eg: 1)Will you lend me your book? 2) Would you like a cup of

12、tea?2. 用于表示意志或意愿。用于表示意志或意愿。 will 指現(xiàn)在，指現(xiàn)在， 而而 would 指指 過去。過去。Eg: 1) Ill never do that again. 2) They said that they would help us.wont 表示表示“不肯、不樂意不肯、不樂意”Eg: No matter what I said, he wont listen to me.3.表示習(xí)慣性動作。表示習(xí)慣性動作。 譯作譯作 “總是、慣于總是、慣于” will 指現(xiàn)在，指現(xiàn)在， would 指過去。指過去。Eg: 1)He will often read all night.

13、 2) Every evening, she would sit by window, deep in thought.4. 表示功能，譯作表示功能，譯作“能、行能、行”Eg: 1) That will be all right. 2) This door wont open.4. should1. 用于表勸告、建議。用于表勸告、建議。 意為意為”應(yīng)該、應(yīng)當(dāng)應(yīng)該、應(yīng)當(dāng)”。Eg: You should keep your promise.2. 用于表推測。用于表推測。 意為意為 “可能、該可能、該”Eg: 1) Its 7 oclock. He should be at home. 2) Its

14、 7 oclock. He should be here at any time.聯(lián)想：聯(lián)想：suggest, order, require/request, insistmust & should1) The light is on. He _ be at home.2) It is 10 oclock. Mr. King _ be at the office.mustshould總結(jié)： must & should:1.推測的情境不同：should表示按常理推測；2.推測的時間不同。1. Youre using Iphone 5s! You _ have a lot of m

15、oney!2. When can you finish your design? It _ (be) ready before you need it.mustshould be5. shall 與與will1. shall 用與第一人稱連用，用在疑問句中時，用與第一人稱連用，用在疑問句中時， 表說話人主動提出做事，并征求聽話者的允諾。表說話人主動提出做事，并征求聽話者的允諾。 shall 與第三人稱連用，詢問對方的意見；與第三人稱連用，詢問對方的意見； will 與第二人稱連用，請求對方做事。與第二人稱連用，請求對方做事。 would 更客氣。更客氣。Eg: 1) Shall we begi

16、n our discussion? 2) Do you feel hot? Shall I turn on the AC? 3) Shall the driver wait? 4) Will you speak louder, please?2. shall的主語是第二、三人稱的陳述句，表示說話人的主語是第二、三人稱的陳述句，表示說話人 的允諾、警告、命令等語氣。的允諾、警告、命令等語氣。 Eg: 1)You shall get the book tomorrow. 2) He shall be punished. 3) You shall go with me. 允諾對方允諾對方警告警告命令

17、命令概括一下：shall表示說話人意志的不可更改will 的主語是第一、二、三人稱的陳述句，表意愿的主語是第一、二、三人稱的陳述句，表意愿或承諾自己（將如何）?；虺兄Z自己（將如何）。1） If you will come to my house，I will show you my new painting.2）-Please remember me to your family. -I will.3) Dont forget to bring your homework. -I wont. 1. It _ be the postman at the door. Its only six oc

18、lock. （2011江西卷）江西卷） A. mustnt B. cant C. wont D. neednt B 2. John promised his doctor he _ not smoke, and he has never smoked ever since. (08北京）北京） A. might B. should C. could D. would3. -I havent got the reference book yet, but Ill have a test on the subject next month. -Dont worry. You _ have it by Friday. A. could B. shall C. must D. mayDB（2011上海春招）上海春招）Some young people these days just _ go out of their homes to contact the real world. A. mustnt B. wont C. mightnt D. sho