be busy with sth 与be busy to do sth的区别

be busy with sth 与be busy to do sth的区别
be busy with sth 与be busy to do sth的区别

be busy with sth 与be busy to do sth的区别
忙于什么事,be busy with sth,
忙于去做什么事,be busy to do sth
二者其实可以等价,例如:
We are busy with homework.
=We are busy to do homework

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