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I ______ go climbing Mount Yuntai.A. must B. need C. may D. can【2012貴州貴陽(yáng)】“Whose notebook is this?” “It _______ Jim’s. It has his name on it.” A. can’t be B. must be C. can be【2012甘肅雞西市 黑龍江黑河 黑龍江齊齊哈爾】 —Is that your teacher?—That _____be . He has gone to Japan with his wife.A. can’t B. mustn’t C. may not【2012湖南岳陽(yáng)】 —Who is that? —It _____ be Shirly. Only she is in red today . A. could B. may C. must【2011湖北恩施】—Is that girl under the tree Mary?—No, that ______be Mary. She is in New York.A. can B. mustn’t C. can’t【2012 湖北黃石】Is Maria knocking at the door?It ______be her. She is in Australia now.A. may not B. needn39。t D. can39。s. Look at his name on the cover! A. can B. may C. must D. need【2012山東濟(jì)寧】This toy Mickey Mouse _______be Amy39。t【2012四川廣安】—Look! The man at the gate ______ be our teacher. He is always standing there every morning. —No, it _______ be him. He is having a meeting in the office now. A. must。 mustn’t C. can’t。s. It has his name on it.A. mustn39。t C. must D. need★【2012湖南常德】In petition, as in life, you _______ not always win.A. may B. shall C. must【2012四川自貢】 Have you heard that some bad thing would happen in 2012?Don39。t B. may not C. needn39。t B. can39。t D. mustn’t情態(tài)動(dòng)詞表推測(cè)用法總結(jié)及專項(xiàng)練習(xí) / could用于表推測(cè)的用法(1) 從使用句型上看,can 通常只用于否定句或疑問句,一般不用于肯定句,而could 可用于肯定句、否定句和疑問句。如:It can’t [couldn’t] be true. 那不可能是真的。注:can 有時(shí)也用于肯定句中表示推測(cè),主要用于表示理論上的可能性(即從理論上看是可能的,但實(shí)際未必會(huì)發(fā)生),或表示“有時(shí)”之意。She can be very unpleasant. 她有時(shí)很令人討厭。如:He could have gone home. 他可能已經(jīng)回家了。Why does he know this? Can [Could] someone have told him about it? 他怎么知道? 會(huì)是哪個(gè)人告訴他了嗎?(3) “could+完成式”除表示對(duì)過去的推測(cè)外,還有以下重要用法:① 表示過去沒有實(shí)現(xiàn)的可能性,常譯為“本來(lái)可以”。你為什么不向我提出?② 用來(lái)委婉地責(zé)備某人過去應(yīng)該做某事而沒有去做,常譯為“本來(lái)應(yīng)該”。③ 表示“差點(diǎn)兒就要”。2. may / might用于表推測(cè)的用法表示推測(cè),兩者都可用,只是 might 比 may 語(yǔ)氣更不確定,表示的可能性更小。如:He may [might] know the answer. 他可能知道答案。And who may [might] she be? 那么她會(huì)是哪一位呢?(2) 從時(shí)間關(guān)系看,對(duì)現(xiàn)在或?qū)?lái)情況作推測(cè),后接動(dòng)詞原形;對(duì)正在進(jìn)行的情況作推測(cè),后接 be doing 結(jié)構(gòu);對(duì)過去情況作推測(cè),后接動(dòng)詞完成式。He may [might] be writing a letter. 他可能在寫信。(3)“might+完成式”除表示對(duì)過去的推測(cè)外,還有以下重要用法:① 表示過去某事可能發(fā)生而實(shí)際上卻并沒發(fā)生。A lot of men died who might have been saved.很多人本來(lái)可以獲救的卻死了。如:You might have made greater progress. 你的進(jìn)步本來(lái)可更大一些的。3. must表示推測(cè)的用法must 表示很有把握的推測(cè),其意為“一定會(huì)”“肯定會(huì)”,只用于肯定句,一般不用于否定句或疑問句。如:I must be the happiest woman on earth! 我一定是世界上最幸福的女人了。4. should have done 的用法should have done只用于談?wù)撨^去情況,主要有兩個(gè)用法:一是用于推測(cè)過去已經(jīng)發(fā)生的情況,二是用于指本該發(fā)生而實(shí)際上未發(fā)生的情況。He should have arrived by now. 此時(shí)他本該到了。5. need have done 的用法need have done結(jié)構(gòu)主要用于否定句或疑問句,一般不用于肯定句。如:You needn’t have hurried. 你當(dāng)時(shí)實(shí)在不必那么匆忙。Need you have paid so much? 你當(dāng)時(shí)真須要付那么多錢嗎?Need they have sold the farm? 他們那時(shí)非得把農(nóng)場(chǎng)賣掉不可嗎?其中表示推測(cè)用法的情態(tài)動(dòng)詞在近幾年的高考中更是屢見不鮮。(意味著已有具體的改進(jìn)計(jì)劃或方案。(意思是鐵路還不完善,尚有問題存在。在一般的陳述句,can與sometimes幾乎相同,表示一種偶然的可能性。=Even expert drivers sometimes make mistakes.=It is possible for the expert drivers to make mistakes.因此,如果講的是一種特殊情況,不是一般情況,就用may,試比較:Mr Reed looks may be ill.Mr Reed is in poor can be ill at any time.Must指邏輯必然,作“想必”、“準(zhǔn)是”、“一定”解,用來(lái)表示我們對(duì)某事有把握的推論或揣測(cè)。析:?!薄究祭縈ary ___ be in saw her in town only a few minutes ago.(NMET1994) ’t ’t ’t not .Is John ing by train? (NMET 2002 Tianjing ) He should,but he ___ likes driving his car.A.must 【分析】May用于否定時(shí),not不是否定may,而是否定句中的動(dòng)詞,這一點(diǎn)與can不同,試比較:He may not know the 。must表示推測(cè)的這種用法通常用在肯定句中,在疑問句中常用can(可能),在否定