参考解答:
busy 短语的用法常用的有两个:
be busy with sth 忙于做某事
be busy doing sth 忙于做某事
例如:
1. The plan for the new book is on ice at the moment. I've been busy with too many other things.
写那本新书的计划暂时搁一下,我一直忙于太多其它的事情。
2. I was busy with my children.
我忙于照顾孩子。
3. He is busy doing his homework.
他正忙着做家庭作业。
4. I am busy working.
我正忙于工作。
你们的作业上一般都用be busy doing sth