______ to reach them on the phone, we sent an email instead.
A.FailB.Failed
C.To failD.Having failed
D

試題分析:考查分詞做狀語(yǔ)。本題的動(dòng)詞fail與句子主語(yǔ)we之間構(gòu)成主動(dòng)關(guān)系,且沒(méi)有打通電話發(fā)生在發(fā)郵件之前,故使用現(xiàn)在分詞的完成式。句意:因?yàn)闆](méi)有打通他們的電話,我們就發(fā)了一封郵件。故D正確。
點(diǎn)評(píng):當(dāng)分詞做狀語(yǔ)的時(shí)候,如果構(gòu)成分詞的動(dòng)詞與句子的主語(yǔ)構(gòu)成主動(dòng)關(guān)系,就使用現(xiàn)在分詞做狀語(yǔ);當(dāng)二者構(gòu)成被動(dòng)關(guān)系,使用過(guò)去分詞做狀語(yǔ)。如果分詞的動(dòng)作發(fā)生在謂語(yǔ)動(dòng)詞之前,就使用分詞的完成式。如果分詞與句子的主語(yǔ)沒(méi)有關(guān)系,可以使用狀語(yǔ)從句或者獨(dú)立主格結(jié)構(gòu)。
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