he+is+very+busy为什么要加ing？

Question

如题所述

Answer 1

因为be busy doing something是一个固定搭配，意为忙着做某事，同义词组是 be busy to do something，所以这个句子后面要用动词ing形式，表示正忙着做某事，造句，他忙着读书，He is very busy reading

Answer 2

固定用法
Be busy doing something.
同义句是
Be busy with something.
如
He is very busy doing his homework.
他正忙于做作业。
同义句是
He is very busy with his homework.本回答被网友采纳

Answer 3

He is very busy.这个句子的意思是，他很忙。如果是这个句子的后面加ing的时候，那就是he is very busy going shopping他忙着购物。
这是一个固定结构
be busy doing sth忙着做某事。本回答被网友采纳

Answer 4

固定用法
be busy doing sth 忙于做某事
如
He is very busy doing his homework.
他忙于做作业。
同义句是
He is very busy with his homework.本回答被网友采纳

Answer 5

这是非谓语的用法，be busy (in) doing sth忙于做某事，He is busy in doing housework. 他忙于做家务。