be busy to do sth.和be busy doing的区别

题目

be busy to do sth.和be busy doing的区别

答案

be busy doing sth 其实也可以是 be busy (in) doing sth.意为忙于做某事.
例：I'm busy (in) doing my home work.
be busy to do sth.如果是 be too busy to do sth.
那就是too...to...结构了,可以这样用,太忙了以至于不能干什么.
但是如果没有那个too那就不能用to do只能用doing表示忙于做某事