If she     that Mary would come to see her, she would never have gone to the party.
A.had knownB.knewC.knowsD.would know
A

試題分析:考查虛擬語氣。本句是一個(gè)條件句的虛擬語氣,條件句中使用過去完成時(shí);主句使用“情態(tài)動(dòng)詞+have done”句意:如果她知道Mary來看她,她就不會(huì)去那個(gè)聚會(huì)了。故A正確。
點(diǎn)評(píng):條件句的虛擬語氣是考查的重點(diǎn)。如果過去事實(shí)相反,條件句中使用過去完成時(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”;如果與將來事實(shí)相反,條件句中有三種:過去時(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)詞提之主語前。
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