2011成考高起點(diǎn)英語(yǔ)語(yǔ)法歸納與練習(xí)15
來(lái)源：育路成人高考發(fā)布時(shí)間：2011-10-09
育路成人高考培訓(xùn)咨詢(xún)
幫助希望進(jìn)入名校的在職人員實(shí)現(xiàn)他們的本、專(zhuān)科大學(xué)夢(mèng)想
第十五節(jié) 情態(tài)動(dòng)詞（二）
情態(tài)動(dòng)詞與完成時(shí)的使用
一、must+have+ED分詞：用于肯定句，表示對(duì)過(guò)去情況的一種肯定推測(cè)，表示“肯定，一定”
1） It around nine o'clock when I drove back home because it was already dark.
[A] had to be [B] must have been [C] was to be [D] must be
2） John's score on the test is the highest in the class；
[A] he should study last night
[B] he should have studied last night
[C] he must have studied last night
[D] he must had to study last night
3） After searching [A] for evidence in the house，the police concluded [B] that the thief must have come in [C] through the window and stole [D] the silver while the family was asleep.
二、may （might）+have+ED分詞：用于肯定句和否定句，表示對(duì)已發(fā)生事情的不肯定的推測(cè)，相當(dāng)于“可能，大概，”其中might較may 語(yǔ)氣更弱，把握更小
She might have gone to see her doctor last week， but I am not sure.
上星期或許她去看醫(yī)生了，但我不敢肯定。
Don't worry， your husband may not have been hurt seriously.
別急，你丈夫也許傷得不厲害。
三、should（ought to）+have+ED分詞：肯定句表示過(guò)去本應(yīng)發(fā)生的事卻沒(méi)有發(fā)生；否定句表示已發(fā)生了本不該發(fā)生的事。前者可譯為“本應(yīng)，”后者為“本不該”
You should have apologized to her for not soon replying to the letter. 你本應(yīng)向她道歉，說(shuō)明為什么沒(méi)能及時(shí)回信。（可你沒(méi)這么做）
4） You yesterday if you were really serious about your work.
[A] ought to come[B] ought to be coming[C] ought to have come[D] ought have come
四、can（not） +have+ED分詞
He is an hour late —— He can have been delayed by fog. Of course，that's a possibility.他遲到了1小時(shí)，可能因?yàn)榇箪F而耽擱了。當(dāng)然這只是可能性問(wèn)題。
The poem can not have been written by her since she was only five years old then.這詩(shī)不可能是她寫(xiě)的，因?yàn)樗菚r(shí)才5歲。
五、“could+have+ED分詞”有時(shí)用于表示過(guò)去的時(shí)間，說(shuō)明某事可能或不可能已發(fā)生；有時(shí)可表示過(guò)去本來(lái)可以做某事，但卻未做
I simply can't understand how he could have made such a mistake. 我簡(jiǎn)直不明白他怎么會(huì)犯那樣的錯(cuò)誤。
He walked there，but he could have taken a taxi. 他走著去了，可當(dāng)時(shí)完全可以坐出租。
“couldn't+have+ED分詞”還表示無(wú)論如何也不可能或沒(méi)有做到
I couldn't have called you. I wasn't near a telephone. 反正我也不可能給你打電話(huà)，我附近沒(méi)有電話(huà)。
5） “We didn't see him at the lecture yesterday.”“He it.”
[A] mustn't attended[B] couldn't have attended[C] would have not attended[D] needn't have attended
六、needn't+have+ED分詞：表示對(duì)過(guò)去不必做的事情卻做了，可譯為“其實(shí)不必”
6） You all these parcels yourself.The shop would have delivered them if you had asked a shop assistant.
[A] didn't need to carry[B] needn't have carried[C] needn't carry[D] didn't need carry
七、used to 表示過(guò)去的習(xí)慣動(dòng)作或狀態(tài)，現(xiàn)在已不存在，在否定陳述句中，一般用didn't use to，也可用used not to；在疑問(wèn)句中用“Did…use to”。used to還可never，often，always等連用。注意used to與be used to的不同，后者表示be accustomed to “習(xí)慣于某種狀態(tài)”，而且跟接名詞或ING形式，而used to后接動(dòng)詞原形，試比較
He used to drink. 表示“他過(guò)去經(jīng)常喝酒”而現(xiàn)在不喝了。
He is used to wine （He is used to drinking wine） at each meal.
表示“他現(xiàn)在已養(yǎng)成習(xí)慣，每頓飯喝點(diǎn)葡萄酒。”
八、had better表示“最好……”，后接動(dòng)詞原形，其否定式為had better not+動(dòng)詞原形
You had better not follow his behavior. 你最好不要學(xué)他。
九、would rather 意思是“寧愿”，表示選擇。它有兩種用法，一是在肯定句中后邊直接跟動(dòng)詞原形，其否定句是在would rather 后加not，即 would rather not+動(dòng)詞原形；二是它后邊可以跟接從句，該從句的謂語(yǔ)動(dòng)詞用一般過(guò)去式表示虛擬語(yǔ)氣。由于would rather表示選擇，它后邊可跟接than
She would rather sleep than talk rubbish. 她寧愿睡不愿閑聊。
7） “Did you criticize him for his mistakes？”——“Yes，but it.”
[A] I'd rather not do[B] I'd rather not doing[C] I'd rather not have done[D] I'd rather not did
[注] would rather和had rather都表示“寧愿”，在用法上也沒(méi)有區(qū)別。但如果說(shuō)would rather與had rather完全一樣（Longman Dictionary of Comtemporary English 如是說(shuō)），這一說(shuō)法有爭(zhēng)議。其實(shí)had rather在現(xiàn)代標(biāo)準(zhǔn)英語(yǔ)中幾乎已經(jīng)不用了。這對(duì)我們考試來(lái)說(shuō)是比較重要的，因?yàn)橐话憧碱}作為標(biāo)準(zhǔn)英語(yǔ)是不用had rather的。
十、例題解析
1） B為正確答案。2） C為正確答案。
3） D錯(cuò)。改為stolen.這里C處和D處是并列的謂語(yǔ)，D處相當(dāng)于must have stolen.
4） C為正確答案。5） B為正確答案。6） B為正確答案。7） C為正確答案。
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