八年級(jí)下冊(cè)Unit2情態(tài)動(dòng)詞課件.ppt

1、新目標(biāo)八年級(jí)下冊(cè)語(yǔ)法 王春菊,Unit 2 情態(tài)動(dòng)詞,Part 1：基本知識(shí),一、情態(tài)動(dòng)詞是什么？,動(dòng)詞的類(lèi)別,行為動(dòng)詞,系動(dòng)詞,助動(dòng)詞,情態(tài)動(dòng)詞,能夠獨(dú)立做謂語(yǔ),不能獨(dú)立做謂語(yǔ),掌握情態(tài)動(dòng)詞的定義：表示可能、懷疑、允諾、 愿望、義務(wù)、必要、猜測(cè)等的動(dòng)詞是情態(tài)動(dòng)詞。,二、情態(tài)動(dòng)詞的基本句型,陳述句 主+情態(tài)動(dòng)詞+ v原 疑問(wèn)句 情態(tài)動(dòng)詞+主+ v原？ 考點(diǎn)：注意may, must疑問(wèn)句的否定回答 否定句 -主+情態(tài)動(dòng)詞 not+ v原 考點(diǎn)：注意had better, need兩種詞性, ought to 的否定,三、?？嫉那閼B(tài)動(dòng)詞,can能; 可能-could may可以-might mus

2、t必須;一定 need需要-非標(biāo)準(zhǔn)情態(tài)動(dòng)詞 should-shall would-will had better used to 過(guò)去常常 Would rather 寧愿 ought to應(yīng)當(dāng),Part 2：?？记閼B(tài)動(dòng)詞,的三個(gè)“能”,能力,樂(lè)意,可能,can,can與be able to 的區(qū)別,Can 是情態(tài)動(dòng)詞，不能獨(dú)立做謂語(yǔ) be able to是系動(dòng)詞，能夠獨(dú)立做謂語(yǔ),所有表示“意愿類(lèi)題目”，都適用 Can/Could you give me some water?,此時(shí)can 與could相等,can與must的區(qū)別,Must肯定是（無(wú)否定）可能是,1. He will _ fin

3、ish it by himself. can/ may/ be able to/ 不填（多） 2. can you give me _ suggestion? another/ other/ the other/ others 3. She _ run fast, but I cant. may/ must/ need/ can,的兩個(gè)意思,樂(lè)意,可能,may,may的回答,肯定回答一般是：Yes, please./Certainly./ Sure等， 否定回答一般是：Please dont./No，you cant/mustnt.,can多用于疑問(wèn)句和否定句，表示懷疑或不相信等態(tài)度； 而ma

4、y則多用于陳述句（肯定），表示一種揣測(cè)。,can與may的區(qū)別,He may be right他可能對(duì) He cant be right他不可能對(duì),的兩個(gè)意思,必須,肯定,must,must的否定回答,肯定回答：yes, must 否定回答：no, you neednt/ no, you dont have to,can多用于疑問(wèn)句和否定句，表示懷疑或不相信等態(tài)度； Must表示推測(cè)時(shí)，不能用否定句,can與must的區(qū)別,Dont have to 不必- mustnt一定不能neednt 不必 must 表必須有否定； 表肯定，不能用否定句,Must的否定,I didnt hear the

5、phone. I must have been asleep. 我剛才沒(méi)有聽(tīng)到電話，我想必是睡著了,的兩個(gè)詞性,情態(tài)動(dòng)詞,行為動(dòng)詞,need,You neednt answer the question now.,You dont need ot answer the question now.,Had better最好,易錯(cuò)點(diǎn)： 錯(cuò)誤理解為had, 或better 否定 解析： 你最好立刻就做 You had better do it right now. 你最好不要碰它 You had better not touch it.,的三個(gè)辨析,Used to,Be used to doing,

6、Be used to do,used to,過(guò)去常常（情態(tài)動(dòng)詞）,He used to go shopping on weekends. 他過(guò)去常常周末去買(mǎi)東西,The Englishman isnt used to driving on the right in China.,某人習(xí)慣于(to是介詞）,被動(dòng)語(yǔ)態(tài)（to是不定式）,Pens are used to write on paper.,Would rather do.than do寧愿做而不愿做,解析:寧愿而不愿，中考共三種表達(dá)方式 1、prefer to do.rather than do寧愿做而不愿做(動(dòng)詞詞組) 例:I pref

7、er to swim rather than stay at home.我寧愿去跑步也不愿待在家里 2、would rather do.than do寧愿做而不愿做(動(dòng)詞詞組) 例:I would rather swim than stay at home. 我寧愿去跑步也不愿待在家里 3、preferto I prefer dogs to cats.相對(duì)于貓.我更喜歡狗. Would rather是情態(tài)動(dòng)詞，否定為 would rather not do,Part 3：情態(tài)動(dòng)詞與助動(dòng)詞,Can與could的相同與不同,Can 能力 he said: “I can do that.” 樂(lè)意 c

8、an I help you? 可能It cannt be rainy,Could 能力,是can的過(guò)去式He said that he could do that . 表樂(lè)意,could可獨(dú)立一詞.Could I go with you?,(willwould; shall should于此相似),Will 只用于將來(lái)時(shí), he will come tomorrow shall, will用來(lái)征求對(duì)方意見(jiàn)，shall用于第一人稱，will用于第二人稱，用來(lái)表示意愿；shall用于第二、第三人稱，will用于第一人稱。,Would 過(guò)去將來(lái)時(shí)，是will的過(guò)去式.He said that he

9、would come tomorrow. 表樂(lè)意 Would you like? 虛擬語(yǔ)氣,1. The doctor suggested that he _ the medicine 3 times a day.多 Take/ took/ takes/ should take 解析 Suggest/advice that 主+should +v原。 考點(diǎn): should 省略；給時(shí)態(tài)迷惑 2. She would leave the city if the rain _. Stops/ would stop/ stopped/ stopping 解析: 1判斷would-過(guò)去時(shí)，從句也用過(guò)去

10、時(shí) 2主句過(guò)去將來(lái)，if 從句用一般過(guò)去 3.The patient knew that he _ the wrong mdicine. take/ took/ takes/ should take,Part 4：真題解析與練習(xí),1must和have to 【考例】-Must we finish giving out the posters today? -Yes, we _. It cant be put off any longer. 太原市 A. can B. may C. must 答案C。解析 此題考查情態(tài)動(dòng)詞的用法?；卮鹩蒻ust引起的一般疑問(wèn)句，其肯定答語(yǔ)要用must，不能用ca

11、n或may。故選C。 -I didnt pass the math test. I think I have spent too much time playing computer games recently. -I agree. You _ play like that any more. 河南省 A. needntB. mustntC. may notD. wouldnt 答案B。解析 此處選mustnt。表示“一定不能”“千萬(wàn)不能”，用較強(qiáng)的語(yǔ)氣來(lái)提醒對(duì)方不能再玩游戲了。 When traffic lights are red. We _stop and wait. 南京市 A. m

12、ayB. canC. must D. might. 答案C。解析 考查情態(tài)動(dòng)詞，must必須，表示禁止。,2can和could -Could I borrow your dictionary? -Of course you _.陜西省 A. can B. mustC. should D. will 答案A。解析 上文的could并不表示過(guò)去，而只是一種委婉的說(shuō)法，所以答語(yǔ)用can更禮貌些。 -Listen! Is Tom singing in the classroom? -No. It _be Tom. He has gone to Paris. 長(zhǎng)沙市 A. may notB. needn

13、t C. cant 答案C。解析 因?yàn)闇凡辉谶@里，所以不可能是他。 一Mary，_you speak Chinese? 一Yes，only a little 北京市 A mustB need C mayDcan 答案D。解析 考查情態(tài)動(dòng)詞，“瑪麗，你會(huì)說(shuō)英語(yǔ)嗎?“是的，會(huì)一點(diǎn)”。故選D。can表示能夠,1Schools _allow students at least one hour a day for sports. A. would B. might C. should D. could 答案C。解析 此處用情態(tài)動(dòng)詞should的用法。should表示“應(yīng)當(dāng)應(yīng)該”的含義比其他三個(gè)詞更強(qiáng)

14、些。 2.Bob，may I _your MP4? 一SureBut youd better not _it to othersA.lend；lend B lend；borrow C borrow；borrowD.borrow；lend 答案D。解析本題考查動(dòng)詞borrow和lend的區(qū)別. 由語(yǔ)境可判斷前者是借入，用borrow后者是借出，用lend。 3.-What about playing football this afternoon, Sam? -I would rather _ at home than_ football. Its too hot outside. A. sta

15、y; playing B. stay; play C. to stay; to playD. to stay; playing 答案：A。解析本題考查了would rather的固定短語(yǔ)的應(yīng)用。Would rather do A than do B和做B比起來(lái)，寧愿做A。,4.He used to _ in the sun, but now he is used toat night. A. read, readB. reading, read C. read, reading D. reading, reading 答案：C。解析考查固定結(jié)構(gòu)的用法。Used 后接動(dòng)詞不定時(shí)，be used

16、to 后接動(dòng)名詞。故選C。 5.You _do it if you really dont want to. A. needntB. mustnt C. cantD. couldnt 答案A。解析 考查情態(tài)動(dòng)詞。本題應(yīng)由句意人手破解。如果你不想做的話，你“沒(méi)有必要”做它，所以正確答案為A項(xiàng)。 6.-May I do the rest of the work tomorrow? -Yea, of course. You _finish it today. A. mustB. mustntC. neednt 答案C。解析思路分析：根據(jù)句意可知，neednt不必,7.You _be tired af

17、ter working for eight hours without a rest. A. canB. mayC. must D. need 答案C。解析 本題考查情態(tài)動(dòng)詞must，can，may8need的區(qū)別。情態(tài)動(dòng)詞must在此表示肯定的推測(cè)。 8.一Look at the boy running on the groundIs it Davis? It _be himI saw him go to the teachers office just now A mustB cant CcouldDmight 答案B。解析 考查情態(tài)動(dòng)詞。表推測(cè)時(shí)否定句中用cant。表示“不可能”，因?yàn)樗?/p>

18、已經(jīng)去了老師的辦公室。,1._I open the window?Its hot here. A.Must B.Shall C.Will D.Would 2.Go and ask Mr Liu.He _tell you. A.may B.can C.would D.could 3._you please tell me the time please? A.Shall B.Will C.May D.Might 4._I try out all the ideas? No,you _. A. Must, mustnt B.Need,need C.Must,dont have to D.Must,

19、dont 5._I speak to Mr Green，please? A.Will B.Could C.Must D.Would ,B,A,B,C,B,課時(shí)訓(xùn)練,9.He said Kate _come to the party.But I dont think so. A.could B.might C.need D.must 10.Need I do my lessons right now? Yes,you_. A.need B.can C.should D.must 11.Would you like to go swimming with me this afternoon? Id love to.But Im afraid I_.I have too much work to do. A.cant B. mustnt C. neednt D.may not 12.To make our city more beautiful，rubbish_into the river. A. neednt be thrown B. mustnt be thrown C.cant throw D. may not throw