忙于某事用英语怎么说？
忙于某事：be busy doing sth 英语中的 be busy doing sth 是一个常用搭配，比如： He is busy writing，他正忙于写作。 I’m busy cooking the dinner，我正忙着烧饭。 She was busy weeding the garden，她在花园里忙着除草。 He’s busy studying for his finals，他正忙着准备期末考试。 注：以上都是后面省略介词in，做方面状语。be busy in doing...