题目内容：

busy的用法,例如busy to do sth ,等各种用法

优质解答

亲 没有 busy to do sth的用法哦. 常见固搭有：1. be busy with/at/over sth.例句：He is busy at work. 他忙着工作. Jean is busy with her work. 琼忙于自己的工作.2. be busy in doing sth, in可以省略I am bu...

追问：

Bill busied himself with collecting materials 为什么用busied