… be busy V-ing …

结构︰

be busy＋动名词

说明︰

此句型意为“忙着做…”。等于“be busy with＋<名词>”。

Mother is busy making cookies for the picnic.
母亲正忙着为野餐做饼干。
He was busy preparing for the exam.
他忙着准备考试。
I was busy looking up all the new words of the lesson in my dictionary.
我忙着在字典里查本课所有的生字。