1. 忙于：be burned to a crisp 烧脆 | be busy with 忙于... | be capable of 有做出(某事)倾向的

2. 忙于做某事：be angry with... 生某人的气 | be busy with... 忙于做某事 | be covered with... 用......覆盖

3. 正忙于：稍稍整理 tidy up | 正忙于 be busy with | 洗衣项目 laundry items

4. 使忙碌：w) 悲伤 sadness | x) 使忙碌 be busy with | y) 勤奋的 hardworking