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25.—Mum, can I go shopping with Gina?—Well, If I were you, I homework first. A.will do B.have to finish C.must finish D.would do【答案】D【解析】試題分析:句意:媽媽,我能和吉娜去購(gòu)物嗎?——哦,如果我是你,我會(huì)首先完成作業(yè)。結(jié)合語(yǔ)境可知主句表示的是對(duì)現(xiàn)在的虛擬,故用過(guò)去將來(lái)時(shí)態(tài),選D??键c(diǎn):虛擬語(yǔ)氣點(diǎn)評(píng):虛擬語(yǔ)氣是一種特殊的動(dòng)詞形式,用來(lái)表示說(shuō)話人所說(shuō)的話并不是事實(shí),而是一種假設(shè)、愿望、懷疑或推測(cè)。判斷是真實(shí)條件句還是非真實(shí)條件句。只有在非真實(shí)條件句中才使用虛擬語(yǔ)氣。通過(guò)句子意思,看假設(shè)的條件是否能夠?qū)崿F(xiàn),能夠?qū)崿F(xiàn)是真實(shí)條件句,不能使用虛擬語(yǔ)氣;假設(shè)的條件不能實(shí)現(xiàn)則是非真實(shí)條件句。與現(xiàn)在事實(shí)相反 若與現(xiàn)在事實(shí)相反,條件從句的謂語(yǔ)用過(guò)去式(be通常用were),主句謂語(yǔ)用“should (would, could, might)+動(dòng)詞原形” 與過(guò)去事實(shí)相反 若與過(guò)去事實(shí)相反,條件從句的謂語(yǔ)用過(guò)去完成時(shí)(had+過(guò)去分詞),主句謂語(yǔ)用“should (would, could, might)+have+過(guò)去分詞”與將來(lái)事實(shí)相反 若與將來(lái)事實(shí)相反,條件從句的謂語(yǔ)用過(guò)去式(be通常用were),主句謂語(yǔ)用“should (would, could, might)+動(dòng)詞原形”:26. 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(huì)幫助你的,但是我太忙了。對(duì)過(guò)去的虛擬If+主語(yǔ)+had +動(dòng)詞過(guò)去分詞,主語(yǔ)+would / should / might / could have + 動(dòng)詞過(guò)去分詞。所以描述的是過(guò)去的事情,故我過(guò)去很忙應(yīng)該用過(guò)去時(shí)??键c(diǎn):考查虛擬語(yǔ)氣及時(shí)態(tài)的用法。27.If I you, I’d keep quiet and listen carefully in class.A.a(chǎn)m B.will be C.were【答案】C【解析】試題分析: 與現(xiàn)在事實(shí)相反:條件從句用動(dòng)詞過(guò)去式,主句用would/could/should/might+動(dòng)詞原形;與過(guò)去事實(shí)相反:條件從句用had done,主句用would/could/should/might+have done;與將來(lái)事實(shí)相反:條件從句用動(dòng)詞過(guò)去式/should+動(dòng)詞原形/were to do,主句用would/could/should/might+動(dòng)詞原形。句意:如果我是你,我上課就會(huì)保持安靜,認(rèn)真聽課。故選C??键c(diǎn):考查虛擬語(yǔ)氣的用法。28.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(lái)。但你沒(méi)有。這里用虛擬語(yǔ)氣,用情態(tài)動(dòng)詞should + have + 過(guò)去分詞,這是對(duì)過(guò)去的一種虛擬。所以選B。考點(diǎn):考查虛擬語(yǔ)氣。29.If I _______ you, I would give some flowers to her.A.a(chǎn)m B.a(chǎn)re C.was D.were【答案】D【解析】試題分析:句意:如果我是你,我會(huì)送她一些花。這是由if引導(dǎo)的一個(gè)虛擬語(yǔ)氣句子,表示與現(xiàn)在事實(shí)相反的情況,其句型為“ if+ 主語(yǔ) + 動(dòng)詞的過(guò)去式( be 動(dòng)詞用 were ),主語(yǔ) +would / could / might / should + 動(dòng)詞原形”。故選D??键c(diǎn):考查虛擬語(yǔ)氣的用法。30. If I you,I buy a bike for him.A.was,would B.was,could C.were,would D.were,could【答案】C【解析】試題分析:句意:如果我是你,我會(huì)給他買一輛自行車。buy sth for sb給某人買某物;本句用的是虛擬語(yǔ)氣,表示與現(xiàn)在的事實(shí)相反,在虛擬語(yǔ)氣中不能用was,而用were,因此選C??键c(diǎn):考查虛擬語(yǔ)氣的用法。