modal verbs 情態(tài)動(dòng)詞

1、 Could 能夠能夠 Might 或許或許 必須必須 Ought to 應(yīng)該應(yīng)該 Shall Should 應(yīng)該應(yīng)該 Will Would 會(huì)Common Modal Verbs:常見(jiàn)的情態(tài)動(dòng)詞：常見(jiàn)的情態(tài)動(dòng)詞：P.S: Today we just learn three of them: can, may, must.1. Modal verbs do not take “-s” in the third person. 第三人稱后不需要加“-s”。 e.g. He can speak Chinese. 2. 否定句 直接在情態(tài)動(dòng)詞后加 “not”. e.g. They may not c

2、ome to the party. 3. Many modal verbs cannot be used in the past tenses or the future tenses.許多情態(tài)動(dòng)詞不能用于過(guò)去時(shí)或者將來(lái)時(shí)。 e.g. She musted study very hard. Modal verbs are special verbs which behave very differently from normal verbs. x “Can” 是最常用的一個(gè)情態(tài)動(dòng)詞。它能用來(lái)表示 能力、許可和可能性。 e.g. I can ride a horse. Can I use yo

3、ur pen? You cannot spell.Can的過(guò)去時(shí) could /kud/Using “can” in present and pastAsk and answerCan Kitty spell? Yes, she can._ Derek _? _ Kitty _? _ Kitty _? _CanmultiplyCanCanNo, he cant.subtractYes, she can.Yes, she can.add “may” 常被用來(lái)表達(dá)可能性，也可以表示請(qǐng)常被用來(lái)表達(dá)可能性，也可以表示請(qǐng)求。求。 表示請(qǐng)求：表示請(qǐng)求： May I use your bathroom? 表

4、示可能性表示可能性 ：I may go shopping in the afternoon. may的過(guò)去時(shí) mightHe might be our new teacher.PS：might也可以表示推測(cè)，可能性比may小,語(yǔ)氣更婉轉(zhuǎn)。may (perhaps) 也許也許,可能可能Using “may” in present, future and past “Must” 用來(lái)表示確定的意思，表示必須，用來(lái)表示確定的意思，表示必須，一定一定 。 必須：必須： You must buy a ticket.一定一定 ： He must be our new teacher.must not 表示

5、禁止表示禁止You must not park here.Must (have to)What do the signs mean? Do you know?You must not cycle.You must be careful.You must turn left.You must not enter.You must pay ten yuan.You must keep silent.You must not turn right.You must not smoke. 情態(tài)動(dòng)詞情態(tài)動(dòng)詞情態(tài)動(dòng)詞不能單獨(dú)作謂語(yǔ)動(dòng)詞，后接其它情態(tài)動(dòng)詞不能單獨(dú)作謂語(yǔ)動(dòng)詞，后接其它做謂語(yǔ)，沒(méi)有人稱和數(shù)的變化

6、。做謂語(yǔ)，沒(méi)有人稱和數(shù)的變化。 表示能夠或不能做某事用表示能夠或不能做某事用can 或或 cant; A bird can fly . Fish cant live without water.2. 告訴人們必須或禁止做某事用告訴人們必須或禁止做某事用must或或mustnt; You must hand in your homework at once. You mustnt talk loudly in public.3. 表示請(qǐng)求或允許做某事表示請(qǐng)求或允許做某事may 或或can; May I come in ? Can I open the door ?4. 情態(tài)動(dòng)詞的疑問(wèn)句：情態(tài)動(dòng)詞

7、的疑問(wèn)句：把把 can may must 置于句首。置于句首。Can you play the guitar?May I come in?Must I finish the work today?Yes，.can.No,.cantYes，.may./SureNo,may not / cant.Yes，.must.No,.neednt.Notes : 1、can 和和 be able to的區(qū)別的區(qū)別 : be able to 有有 人稱數(shù)和時(shí)態(tài)的變化。人稱數(shù)和時(shí)態(tài)的變化。 I can come tomorrow . He was able to help the old lady. I wil

8、l be able to come tomorrow.2、在回答、在回答must的疑問(wèn)句時(shí)，否定回答常用的疑問(wèn)句時(shí)，否定回答常用 neednt 或或dont have to表示不必，而不用表示不必，而不用 mustnt 。 Must we stay here ? No, you neednt . ( No, you dont have to .)Notes : 3、May?的回答可以有下列方式：的回答可以有下列方式：Yes, of course.Yes, please.Sure.No, you must not.No, you cant.Do exercise about modal verb

9、s1 John_ come to see us tonight, but he isnt very sure yet. A. may B. can C. has to D. must 2 They _ do well in the exam. A. can be able to B. be able to C. can able to D. are able to -May I take this book out? -No, you_. A. cant B. may not C. neednt D. arent 4 You_ go and see a doctor at once becau

10、se youve got a fever. A. can B. must C. dare D. would 5 -Can you speak Japanese? -No, I_. A. mustnt B. cant C. neednt D. may not 6 Must I finish the work today? No, you _. A. dont B. wont C. neednt D. mustnt7 You _ talk loudly in the library. A. dont B. mustnt C. neednt D. dont have to8 - You must c

11、ome here at six tomorrow morning. -Sorry, I _ be here so early. A. need B. can C. must D. cant9 After a long walk, the old man_ be tired now. A. must B. has to C. need D. can.用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空：。1.I can play football. _you swim?2.Dont worry. You _ return me this book tomorrow.3.My grandma is ill. You _ talk

12、 so loudly here .4.I cant play with you. I _finish my homework first.5.I_ get up early tomorrow. because I have a meeting.6._you please open the window? CanmaycantmustmustCan9. Nobody _live without air.10._he speak Chinese ?Yes ,a little.11. The book _ be returned before Saturday.12._I come in ?Yes ,please.13. You _give up smoking at once. Its bad for your health.14. Excuse me ._I ask you a question?15. _you tell me where the station is ?16. _ I finish the work now ?No, you _. You _ do it t