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(be通常用were),主句謂語用“should (would, could, might)+動詞原形”:25. If it had been possible, I would have helped him, but I ______ too busy.A.had been B.would be C.were D.was【答案】D【解析】試題分析:句意:如果可能的話,我肯定會幫助你的,但是我太忙了。對過去的虛擬If+主語+had +動詞過去分詞,主語+would / should / might / could have + 動詞過去分詞。所以描述的是過去的事情,故我過去很忙應(yīng)該用過去時。考點:考查虛擬語氣及時態(tài)的用法。26.Sir, you should__________ at the red light.But you didn’t.A.stop B.have stopped C.not have stopped D.stopped【答案】B【解析】試題分析:句意:先生,你應(yīng)該在紅燈亮?xí)r停下來。但你沒有。這里用虛擬語氣,用情態(tài)動詞should + have + 過去分詞,這是對過去的一種虛擬。所以選B??键c:考查虛擬語氣。27.If I you, I would rather at home and watch TV than to the party.A.was;stay, go B.a(chǎn)m;stay, go C.were;to stay, go D.were;stay, go【答案】D【解析】試題分析:句意為:如果我是你,我寧愿在家看電視也不去參加聚會。根據(jù)語境,這是一個與現(xiàn)在事實相反的虛擬條件句,主句用would/should+動詞原形,從句用一般過去時(be動詞用were)。另外,would rather do sth than do sth是固定句型,表示“寧可……也不……”。故選D??键c:考查虛擬條件狀語從句。28. — I don’t know what to do.— If I you, I buy a guidebook.A.a(chǎn)m。 will B.a(chǎn)m。 would C.were。 will D.were。 would【答案】D【解析】試題分析:句意:我不知道做什么?如果我是你,我就會買一本指南。虛擬語氣是一種特殊的動詞形式,用來表示說話人所說的話并不是事實,而是一種假設(shè)、愿望、懷疑或推測。其主要有三種結(jié)構(gòu):與現(xiàn)在事實相反若與現(xiàn)在事實相反,條件從句的謂語用過去式(be通常用were),主句謂語用“should (would, could, might)+動詞原形”與過去事實相反若與過去事實相反,條件從句的謂語用過去完成時(had+過去分詞),主句謂語用“should (would, could, might)+have+過去分詞”與將來事實相反若與將來事實相反,條件從句的謂語用過去式(be通常用were),主句謂語用“should (would, could, might)+動詞原形”。根據(jù)句意,可知是與現(xiàn)在的事實相反,故選D考點:考查虛擬語氣的用法。29.What_____you do if you had a million dollars ? A.would B.will C.did D.do【答案】A【解析】考查點:虛擬語氣。解題思路:根據(jù)句意:如果你有一百萬你將會干什么? “如果你有一百萬”是對現(xiàn)在的一種假設(shè),與現(xiàn)在的事實相反。表示與現(xiàn)在事實相反的虛擬語氣的結(jié)構(gòu)是:主句用should/would/could/might+動詞原形,從句用一般過去時態(tài)。故選A。30.She doesn’t stick to her exercises and a balanced diet. If she _______, she would remain slim and healthy.A.had done B.would do C.did D.should【答案】C【解析】【詳解】句意:她沒有堅持鍛煉和均衡飲食。如果她這樣做了,她將保持苗條和健康??疾樘摂M語氣。had done過去完成時;would do過去將來時;did過去時;should應(yīng)該;根據(jù)后文“would remain ”,所以是對現(xiàn)在的虛擬,此處應(yīng)是did/be動詞(were),故選C。