1：The pan is used to cook food.这个平底锅被用来做食物.2：He used to swim in the river when he was small.他小时候曾经在河里游泳.3：I used to live in the university.我以前住在学校.
用use to怎么造句?
1：The pan is used to cook food.这个平底锅被用来做食物.2：He used to swim in the river when he was small.他小时候曾经在河里游泳.3：I used to live in the university.我以前住在学校.