题目

关于to do与to be done
刚才看了两个例句,给分析下什么时候用to do 什么时候to be done
any type of physical activity you choose to do will increase the number of calories your body uses.
when the policemen arrived on the scene,torn pieces of paper were everywhere to be seen

提问时间：2021-01-13

答案

to do 是主动语态,一般是sb to do sth.
to be done是被动语态,是sth.to be done (by sb.)