be busy in 用法

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be busy in 用法
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be busy in 用法
be busy in 用法

be busy in 用法
be busy doing sth.=be busy with sth.忙于做某事,如:I'm busy with my homework.=I'm busy doing my homework.with后面接事(sth.),没有with的话后面要接做什么事(doing sth.).

这边的in 是介词 后面要接doing
be busy doing sth.=be busy with sth.忙于做某事,如:I'm busy with my homework.=I'm busy doing my homework.with后面接事(sth.),没有with的话后面要接做什么事(doing sth.)。

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