______ it rain heavily tomorrow, we would have to put off the visit to the Forbidden City.
A.WereB.ShouldC.WouldD.Will
B

試題分析:考察虛擬語(yǔ)氣和倒裝。在條件狀語(yǔ)從句中,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。本題就是把if省略,把should提前。句意:如果明天的雨下得很大,我們就不得不不推遲到紫禁城的參觀。故B正確。
點(diǎn)評(píng):條件句的虛擬語(yǔ)氣是考查的重點(diǎn)。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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