be busy 什么 on还是of还是for还是with
问题描述：
be busy 什么 on还是of还是for还是with
答
不要这么懒啊~找本字典一翻就找到了的
be busy at/with sth.
be busy doing sth.
都是忙于某事的意思
答
be busy with
忙于
She's busy with some important work.
她正忙于一些重要工作。
另有
be busy in
忙于
He is busy in preparing for the examination.
他忙着准备考试。
be busy doing sth忙于做某事
希望可以帮到你，谢谢~！！
答
be busy doing sth.
be busy with...
答
固定搭配
be busy doing sth
be busy with sth