be busy doing sth

• 忙于做某事

be busy doing sth的用法和样例：

例句

1. Nowadays, when Huang is busy being the volunteer chef at Tzu Chi, the former male chauvinist is her best kitchen hand.
   如今，当太太忙于做香积志工时，这个从前是沙文主义的大男人，就是她的好帮手了。