情態(tài)動(dòng)詞完成時(shí)（學(xué)生卷）

1、情態(tài)動(dòng)詞表示說話人的態(tài)度和看法L在句中（能/不能）獨(dú)立充當(dāng)謂語.不受任何人稱、數(shù)變化的影響.后跟動(dòng)詞（什么形式？）本單元著重講情態(tài)動(dòng)詞表示猜測(cè)時(shí)的用法表示猜測(cè)的情態(tài)動(dòng)詞有 can（could）, may（might）, must （一定），may not （might） not 可能 不，can（不可能）注意must（一定）的否定形式是, mustift意為L(zhǎng)情態(tài)動(dòng)詞一般（式）用法：1 .在表示具體的可能性時(shí)，can用于否定句和疑問句，may, might,could用于肯定句Eg:或許哈雷彗星五十年后會(huì)撞上地球。Halei Comet hit the earth in 50 yeas tim

2、e.A:it be true?-Isn t that Ann s husband over there?No, it be him. I m sure he doesn t wear glasses.can t B.mustn t C.won t D.may not2.Can表示一般性的或理論上的可能性，may是表示具體的可能性。Eg： One can travel to Qingdao by boat,by train or by air.I may fly to Beijing next week.Practise.You might as well tell the furniture

3、manufacturer that male customers not like the designof the furniture.A. must B. may C. can D. need. My English-Chinese dictionary has disappeared. Who have taken it?A. can B. must C. need D. mayTourism help a country promote the friendship with other countries, but too much tourism create problems.A

4、. may shouldB. might* mayC. can canD. shall maySummary：1）在表示具體的可能性時(shí)，用于否定句和疑問句，用于肯定句.2） 表示一般性的或理論上的可能性，是表示具體的可能性。II.本單元的重點(diǎn) 1.情態(tài)動(dòng)詞的完成時(shí)；情態(tài)動(dòng)詞+have done用法：l.must have done “過去一定發(fā)生了/做了某事“，表示對(duì)過去事情肯定推測(cè)，只用于肯定句中。It last night, for the road is quite muddy.昨晚一定下雨了，因?yàn)槁泛苣酀簟an/cant have done“過去可能發(fā)生了（做了）某事/過去不可能發(fā)生

5、了（做了）某事”，表示對(duì)過去疑問和否定的 推測(cè)，用于疑問句和否定句中。There is nowhere to find Tom. Where can he have gone? He to Beijing ,forI saw him just now.到處都找不到湯姆，他可能去哪里呢？他不可能去北京，我剛剛還見他來。couldnt have done“過去不可能做過某事”1）表示對(duì)過去事情的否定推測(cè)We them because of the noise from the river.由于河水的聲音我們當(dāng)時(shí)不可能聽到他們的談話。用于虛擬語氣If it hadnt been for your h

6、elp,! couldnt have succeeded.Meaning ： could have done“過去本來能做某事而實(shí)際上沒做”（表虛擬）Tom, but he was too careless,湯姆本來能通過考試，但他太粗心了。may/might have done“過去可能/也許做了某事”表示對(duì)過去發(fā)生過的事情的推測(cè)，用might可能性更小。It is too late .1 think Tom（ go） to bed.太晚了，我想湯姆或許已經(jīng)睡了。may not /might not have done“過去可能/也許沒做過某事”表示對(duì)過去發(fā)生過的事情推測(cè)，用might可能性

7、更小。Tom may not have finished his homework.湯姆可能完成了他的作業(yè)。They（regard） me as their friends.他們可能沒把我當(dāng)朋友看待。should/ought to have done ”過去本應(yīng)該做某事而實(shí)際上沒做”You are too lazy . You（finish） the work yesterday.你太懶了，你昨天本應(yīng)該完成那項(xiàng)工作。shouldn /oughtn have done”過去本不應(yīng)該做某事而實(shí)際上卻做了”You（tell） her the truth.你本不該告訴她真相。neediTt have

8、done ”過去本來不必做某事但卻做了”You（take） a taxi here。你本來不必打車來這里。總結(jié)如下表：must haveMeaning, 只用于（肯定/否定）done句。表示對(duì)（過去/現(xiàn)在/將來）所做事情的肯定推測(cè)。can/could have done 表示對(duì)（過去/現(xiàn)在/將來）情況的推測(cè)，常用于_（肯定/否定）和疑問句。也可用于虛擬語氣，表示過去本來可 以做某事但沒做。should/oughtMeaning , 其否定式 shouldnt/oughto have donetnt have done 意思是。neednt have doneMeaningmay/mightMe

9、aning ;“might have done 還可表示本來have done可能但實(shí)際上沒發(fā)生”的意思。Practice單項(xiàng)選擇Did they visit the famous university?-No. They it, but they spent too much time shopping.A. must have visited B. could have visited C. cant have visited D. shouldnt have visitedI knew she was in because I heard the radio, but she didnt

10、 open the door. She the bell.A. might not hear B. mustnt have heard C. couldnt hear D. may not have heardNow, look at our purchase. We so much food and drinks now that Emily wont bewith us for dinner.A. neednt have boughtB. might have boughtC. could have boughtD. ought to have boughtSomeone my umbre

11、lla. I found it wet.A. should have used B. cant have used C. must have used D. could have used-1 have looked for my keys everywhere, but I cant find them.-Sorry to hear that. You them somewhere.A.must loseB.should loseC.must have lostD.should have lostHis father him for his rudeness, for Tom looked

12、happy.A.could have forgivenB.might have forgivenC.must forgiveD.must have forgivenT cant find my purse. I it in the supennarket yesterday, but Pm not sure.A.should leaveB.must have leftC.might leaveD.could have left二、根據(jù)所給漢語意思完成句子.考試后我說這次考試很容易，還說我準(zhǔn)能得高分，我的口氣聽上去想必很是自得。I（sound） very proud of myself afte

13、r the quiz, saying how easy it was and how I was sure to get a good grade.Linda可能在哪呢？ Linda可能在公司。.她一定把鑰匙丟了.A:經(jīng)理可能正在開會(huì)。B:不。不可能。.他們一定走了，可是應(yīng)當(dāng)給我留一個(gè)條子呀！補(bǔ)充1情態(tài)動(dòng)詞后加進(jìn)行式表示猜測(cè)的情態(tài)動(dòng)詞的不同形式已經(jīng)發(fā)生：can/may/must/might+ have done正在發(fā)生:can/may/must/might+ be doing （想必正在， 可能正在）情態(tài)動(dòng)詞后加進(jìn)行式 表示的意義：表示“想必正在”“可能正在”They may be discu

14、ssing the problem,他們可能正在討論問題。It s 12 o clock. They（一定再吃中飯）.He（不可能在說真相） the truth.IL情態(tài)動(dòng)詞的特殊手法can9t but do sth表示“不得不/只好做某事”I cant but tell you the truth.我不得不告訴你真相。注意：表示“不得不/只好做某事”的句式：cant help but do cant choose but do can do nothing but docan help doing sth情不自禁做某事Hearing the sad story ,he can、help cr

15、ying.聽完那個(gè)悲傷的故事，他禁不住哭了起來。may as well do sth最好/倒不如做某事You may as well finish your work now.你最好現(xiàn)在就完成你的工作。may well do sth 相當(dāng)于 be likely to do sth “很可能做某事”Tickets are likely to be expensive. 入場(chǎng)券可能很貴。can not /can never +be +adj enough,can not /can never +be +too adj”再.,也不過分或“越,.越好”You can never be too careful while crossing the road.Y