题目内容
10.Iwas watching(watch) TV when someone knocked at the door.分析 有人敲门的时候我正在看电视.
解答 答案:was watching.结合后面的时间状语从句when someone knocked at the door有人敲门的时候,其中knocked是过去式,故这里是说过去的事情,结合前后的含义,得知这里是表达过去某个时刻正在进行的动作,故用过去进行时was/were+doing,所给单词是动词watch观看,主语是I,故答案是was watching.
点评 1.when 和while引导的状语从句中,强调某个动作正在进行的过程中时要用进行时态,while表示一段时间,因此它所引导的状语从句中,谓语动词常用进行时态,如:
When/While we were having supper,the light went out.我们正在吃饭时灯熄灭了.
2.when用作并列连词时,主句常用进行时态,从句则用一般过去时,表示主句动作发生的过程中,另一个意想不到的动作发生了.如:
I was walking in the street when someone called me.我正在街上走时突然有人喊我.
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