某人忙于做某事用英文怎么说

"busy with" 是表示某人正在忙于做某事的常用说法。

来源：
这是一个简单的词组，来自英语语法，没有特殊来源。

例句：

I'm busy with work. (我正忙着工作。)
She's busy with her studies. (她正忙着学习。)
He's busy with his family. (他正忙着照顾家人。)