be busy with sth 与be busy doing sth

问题描述:

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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