be busy with sth 与be busy doing sth
问题描述：
be busy with sth 与be busy doing sth
答
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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答
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
答
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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