Long ago,there was a big cat in the house.He caught many mice while they were stealing food.

问题描述:

Long ago,there was a big cat in the house.He caught many mice while they were stealing food.
翻译

Long ago,there was a big cat in the house.He caught many mice while they were stealing food.
在很久以前,在一座房子里有一只大猫,它抓了许多正在偷食物的老鼠.
1.mice是mouse(老鼠)的复数
2.were/was+doing sth.是过去完成时态