This computer is of good quality. If it ___________ break down within the first year, we would repair it at our expense.
A.wouldB.couldC.shouldD.might
C

試題分析:考查條件句的虛擬語(yǔ)氣。本題是一個(gè)與將來(lái)事實(shí)相反的虛擬語(yǔ)氣。條件句中有三種情況,過(guò)去時(shí);were to do ;should+動(dòng)詞原形,主句使用“情態(tài)動(dòng)詞+動(dòng)詞原形”;句意:這種電腦的質(zhì)量很好,如果在第一年中壞掉,我們會(huì)免費(fèi)為你維修。故C正確。
點(diǎn)評(píng):條件句中的虛擬語(yǔ)氣,如果過(guò)去事實(shí)相反,條件句中使用過(guò)去完成時(shí),主句使用“情態(tài)動(dòng)詞+have done”;如果主句與現(xiàn)在事實(shí)相反,條件句中使用過(guò)去時(shí),be動(dòng)詞使用were,主句中使用“情態(tài)動(dòng)詞+動(dòng)詞原形”;如果與將來(lái)事實(shí)相反,條件句中有三種:過(guò)去時(shí);were to do ;should+動(dòng)詞原形,主句使用“情態(tài)動(dòng)詞+動(dòng)詞原形”;要特別注意如果省略了if,句子要使用部分倒裝的形式,把助動(dòng)詞,be動(dòng)詞,情態(tài)動(dòng)詞提之主語(yǔ)前。
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