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

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?

懒人打哈哈 1年前已收到4个回答举报

就这样活着幼苗

共回答了18个问题采纳率：94.4% 举报

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

1年前

linda14 幼苗

共回答了3个问题举报

固定句式。。。。。。。。。。。。

1年前

刀锋彷徨幼苗

共回答了6个问题举报

was是be动词的过去式，be动词后动词要变为动名词，且前后两个分句时态要一致
望采纳，谢谢

1年前

南方的树花朵

共回答了5402个问题举报

好吧。记住 busy这个形容词在句子裏的原始结构：be busy (in) doing sth ---------在现代英语中，in 通常省掉了，这个doing是动名词形式，不是分词形式：
He was busy (IN) doing his homework while I was cooking busily.

你下手太快了，唉，- - - - - 。

1年前

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