He was about to rob the bank when he saw a police-car coming

问题描述:

He was about to rob the bank when he saw a police-car coming
从句是什么时态 为什么come要用现在分词形式
1个回答 分类:英语 2014-10-07

问题解答:

我来补答
e about to do something when 是固定搭配,意为正准备做某事,主从句都为过去式,see somebody \ something doing 意为看见某人正在做某事
 
 
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