be busy with sth 和 be busy dong

be busy with sth 和 be busy dong
be busy with sth 和 be busy dong

be busy with sth 和 be busy dong
前者加的的某事
be busy with my homework
强调事
be busy doing my homework
强调做这件事
只有这一点细微的差别
一般来说他们的意思是相等的

be busy with sth忙于某事
be busy doing sth忙于做某事
如：
I'm busy with my homework.
我正忙于作业
I'm busy doing my homework
我正忙于做作业。
意思都一样，只不过接的词词性不一样