外研社八年級(jí)上語(yǔ)法知識(shí)點(diǎn)-情態(tài)動(dòng)詞(26張)課件

1、Grammar Focus 情態(tài)動(dòng)詞 may, can, must, needGrammar Focus 情態(tài)動(dòng)詞 may 可能；可以 may not 可能不 can 能；可以 cant 不能；不可能 must 必須；一定 mustnt 不準(zhǔn)，不允許 need 需要 needt 不必，不需要+ 動(dòng)詞 ( )原形 may 可能；可以+ 動(dòng)詞 ( can(能) 表示能力 He can speak a little English. Can you fly? 表示請(qǐng)求或允許 Can I help you? 表示猜測(cè) That can not be our English teacher, becau

2、se she has gone to Shanghai .can(能) 表示能力 He can speak a l 表請(qǐng)求時(shí) could語(yǔ)氣更委婉，主要用于疑問(wèn)句， 不可用于肯定句，答語(yǔ)應(yīng)用can.Could I come to see you tomorrow? Yes, you can. （否定答語(yǔ)可用No, Im afraid not.） 注意 表能力時(shí) could 是 can 的過(guò)去式。 表請(qǐng)求時(shí) could語(yǔ)氣更委婉，主要用于疑問(wèn)句，Cou表示請(qǐng)求或允許 :May I go home，please? 以may（表許可或請(qǐng)求）開(kāi)頭的一般疑問(wèn)句,肯定回答用may，否定回答用mustnt或

3、cant. 表示猜測(cè)（可能） :You may be right. No, you _ may(可以)Yes, you may.注意might為may的過(guò)去式，語(yǔ)氣較為婉轉(zhuǎn)客氣或更加不肯定。 You might be right. mightmustnt / you cant.表示請(qǐng)求或允許 :May I go home，pleas 表示推測(cè)“肯定，一定” : 表示命令“必須” : You must come early tomorrow They must be at home. The light is on. must(必須)mustnt(禁止) 否定時(shí)表示 “禁止” :You must

4、nt smoke here. 表示推測(cè)“肯定，一定” : 表示命令“必須” : Y注意must開(kāi)頭的疑問(wèn)句，其否定回答通常用 dont have to 或neednt 。而不用mustnt -Must I finish my homework first? - Yes, you must. - No, you dont have to/ neednt. 注意must開(kāi)頭的疑問(wèn)句， -Must I finis1.-Must I come before eight oclock? -No, you _.” A. cant B. dont C. mustnt D. neednt2.-Must I f

5、inish all the work before I leave? -Yes, you _ .” A. must B. can C. mustnt D. needntDA1.-Must I come before eight o3. You _ be quiet when you are in a library. A. may B. can C. will D. mustD3. You _ be quiet when you a（表命令） 比較 You may not smoke here(不可以) 語(yǔ)氣輕 You cant smoke here（不能）重 You mustnt smoke

6、 here（決不可）最重 cantmay notmustnt（表命令） 比較 You may not smoke既可以做情態(tài)動(dòng)詞, 也可以做實(shí)意動(dòng)詞。 情態(tài)動(dòng)詞 (need do sth) I need buy a big house. need(需要)He need drive me home. Need I buy a big house ? - Yes, you must.- No, you neednt / dont have to. (不必要)既可以做情態(tài)動(dòng)詞, 也可以做實(shí)意動(dòng)詞。 情態(tài)動(dòng)詞 (nee 實(shí)意動(dòng)詞 (need to do sth) He needs to buy a b

7、ig house. Do I need to buy a big house ? - Yes, you do. /- No, you dont. 實(shí)意動(dòng)詞 (need to do sth) He neehad better do sth 意為“最好”，表示建議和勸告，否定式為had better not do sth. ，后面跟動(dòng)詞原形。You had better go to see a doctor.Youd better not stay here.had better(最好)had better do sth 意為“最好”，表示建have to(必須)have to 表示客觀因素We

8、are very glad at the party, but mother is ill, so we have to leave now .must 表示主觀因素We must study hard to find a good job for ourselves .must(必須)have to(必須)have to 表示客觀因素must(1. It rained heavily, so we _ stay at home watching TV all day. A. could B. had to C. must2. May I take the book out of the re

9、ading room? No, you cant. You _ read it here. Its the rule. A. must B. would C. may BA練一練1. It rained heavily, so we _3. Dad, may I watch TV? No. You _ finish your homework first. A. must B. can C. may 4. Bob, shall we go and meet our new classmate? Sorry. Im busy now. But you _ ask David to go with

10、 you. He is free Aneed Bmay CmustAB3. Dad, may I watch TV?AB4. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should5. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C. neednt D. may notC C 4. Could I borrow your dicti6. Joh

11、nny, you _ play with the knife, you _ hurt yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldntB B 7. -Will you stay for lunch? -Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont8. -May I pick a flower in the garden? - _. A. No, you needn

12、t B. Not, please. C. No, you mustnt D. No, you wontB C 7. -Will you stay for lunch?B9. -Must I drive to his house and pick up the children? No, .A. you shouldntB. you might not C. you neednt D. you mustntC 10. There is someone knocking at the door. it be Tom? A. can B. must C. should D. ought toA 9.

13、 -Must I drive to his house中考鏈接1. Who is the man over there? Is it Mr Li? No, it _ be him. Mr Li is much taller. A. mustnt B. may not C. cant D. needntC中考鏈接1. Who is the man over t2. Could I look at your pictures? Yes, of course you _. A. could B. can C. will D. mightB3._you pass me a pen? Id like t

14、o write down the telephone number. A. Need B. Could C. Must D. ShouldB2. Could I look at your pict4. May I go to the cinema, Mum? Certainly. But you _ be back by 11 oclock. A. can B. may C. must D. needC4. May I go to the cinema, M5. Susans parents have bought a large house with a swimming pool. It _ be very expensive. A. must B. can C. mustnt D. cant6. You _ go and ask Meimei. She _ know the answer. A. must; can B. must; may C. need; can D. can; mayAD5. Susans parents ha