be busy with sth 与be busy doing sth

be busy with sth 与be busy doing sth
be busy with sth 与be busy doing sth

be busy with sth 与be busy doing sth
be busy doing sth侧重于动作 sth 是名词哦· do是动词的形式
be busy with sth 侧重于状态
意思都一样,可以互换.
He is busy doing homework.=
He is busy with homework.
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be busy with sth ，with后面加事情 忙于某事
He is busy with his homework
be busy doing sth ，从doing 就开始加动词进行式 忙着做......
He is busy doing his homework

如果接名词代词用前者， 如果要用动词，表示忙于做什么 用后者
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