20.When they arrived at the train station,the plane has taken off.把has 改為had.

分析 當(dāng)我們到達(dá)火車(chē)站時(shí),飛機(jī)已經(jīng)起飛了.

解答 答案是:把has 改為had;本題考查時(shí)態(tài);我們到達(dá)火車(chē)站是過(guò)去,飛機(jī)起飛是我們到達(dá)火車(chē)站前,是過(guò)去的過(guò)去,故需要過(guò)去完成時(shí),把has 改為had.

點(diǎn)評(píng) 句子改錯(cuò)要在理解句子結(jié)構(gòu)的基礎(chǔ)上從詞語(yǔ)搭配、詞性、單復(fù)數(shù)、時(shí)態(tài)、非謂語(yǔ)動(dòng)詞等方面進(jìn)行綜合考慮,分析可能存在的錯(cuò)誤;

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