情態(tài)動(dòng)詞can, may, must, need解析區(qū)別練習(xí)ppt

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1、2021/6/301( (能能) )( (可以可以) )( (需要需要) )( (必須必須) )From Jasmine Kan2021/6/302情態(tài)動(dòng)詞后面 + 動(dòng)詞原形情態(tài)動(dòng)詞沒有人稱和數(shù)的變化I can not play basketball. I need buy / bought a computer. ( (能能) )( (需要需要) )She can / cans ride a horse. Amy need / needs buy a book.否定式構(gòu)成是在情態(tài)動(dòng)詞后面加 not I can play / played basketball. 2021/6/303( (能能

2、) )用法: 表示能力表示能力 :He can speak a little English. Can you fly? 表示請(qǐng)求或允許表示請(qǐng)求或允許 : Can I help you? 表示猜測(cè)表示猜測(cè) :That can not be our English teacher, because she has gone to Shanghai . could也可表示請(qǐng)求,語(yǔ)氣委婉,主要用于疑問句, 不可用于肯定句,答語(yǔ)應(yīng)用canCould I come to see you tomorrow? Yes, you can. (否定答語(yǔ)可用No, Im afraid not.) 2021/6/3

3、04用法:表示請(qǐng)求或允許表示請(qǐng)求或允許 :May I go home,please? (1)以may(表許可或請(qǐng)求)開頭的一般疑問句,肯定回答用may,否定回答用mustnt或cant. (2)在疑問句中不用于第二人稱 表示可能性表示可能性 :You may be right. No, you _ ( (可以可以) )Yes, you may.might為may的過(guò)去式,但也可以代替may,語(yǔ)氣較為婉轉(zhuǎn)客氣或更加不肯定。 You might be right. mustnt / you cant.2021/6/305試比較 : You may not smoke here(不可以) 語(yǔ)氣輕 Y

4、ou cant smoke here(不能)重 You mustnt smoke here(決不可)最重 2021/6/306用法:既可以做情態(tài)動(dòng)詞, 也可以做實(shí)意動(dòng)詞 實(shí)意動(dòng)詞實(shí)意動(dòng)詞 (need to do sth) : 情態(tài)動(dòng)詞情態(tài)動(dòng)詞 (need do sth) : I need buy a big house. ( (需要需要) )He need drive me home. Do I need to buy a big house ? He needs to buy a big house. Need I buy a big house ? - Yes, you must.- No

5、, you neednt / dont have to. (不必要)- Yes, you do.- No, you dont. 2021/6/307用法: 表示推測(cè)表示推測(cè)“肯定,一定肯定,一定” : 表示義務(wù)、必要或命令表示義務(wù)、必要或命令 : You must come early tomorrow -Must I finish my homework first? They must be at home. The light is on. - Yes, you must. - No, you dont have to/ neednt. ( (必須必須) )must開頭的疑問句,其否定回

6、答通常用 dont have to 或neednt 。而不用mustnt ( (禁止禁止) ) 否定時(shí)表示否定時(shí)表示 “禁止禁止” :You mustnt smoke here. 2021/6/308用法:Its eleven oclock . I have to go now .It was getting dark. He had to finish the work first . I dont have to go now . He doesnt have to finish the work first.( (必須必須) )have to 表示客觀因素We are very glad

7、 at the party , but its 11 , so we have to leave now .must 表示主觀因素We must study hard to find a good job for ourselves .( (必須必須) )2021/6/309My brother was very ill, so I call the doctor in the middle of the night. He said that they work hard. You dont have to tell him about it. You mustnt tell him abo

8、ut it. 你不一定要把此事告訴他。 你一定不要把這件事告訴他 .had tomust2021/6/3010Can I ?Yes, you can. No, you cant.May I ?Yes, you may. No, you cant / mustnt.Need I ?Yes, you must. No, you neednt.Do I need to ?Yes, you do. No, you dont.Must I ?Yes, you must. No, you neednt.2021/6/30112021/6/30121. Must we clean the house now

9、? No, you_. neednt B. may not C. mustnt D. cant2. You return the book now. You can keep it next week if you like. A. cant B. mustnt C. neednt D. may not3. Johnny, you play with the knife, you hurt yourself. A. wont.cant B. mustnt.may C. shouldnt, must D. cant.shouldnt4. _I go back before lunch? No,

10、I dont think you_. A. Need.must B. Do.need to C. Must.have to D. May . ought to2021/6/30135. The teacher_ do all the exercises, but a pupil_. A. neednt.must B. may not.must C. neednt.neednt D. cant.must6. Must I finish this novel this morning ? No, you_. A. mustnt B. might not C. dont have to D. cant7. The taxi _ only hold six passengers. It is full. You _ take the next one. A. may.may B. can.may C. may.can D. must.can8. This pen looks like mine, yet it isnt. Whose _ it be? A. must B. can C. may D. might2021/6/3014 若有不當(dāng)之處,請(qǐng)指正,謝謝!若有不當(dāng)之處,請(qǐng)指正,謝謝!

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