He was busy --- (do)his homework while I was cooking

问题描述:

He was busy ___ (do)his homework while I was cooking
这道题为什么要用非谓语中的动名词形式doing呢?
1个回答 分类:英语 2014-11-26

问题解答:

我来补答
doing
当我做饭的时候,他正忙于做作业.
be busy doing sth
基本翻译
忙着做某事
网络释义
be busy doing sth:忙于做某事 | 忙于 | 忙于做
 
 
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