What's wrong with John?-He hurt himself_____(play)soccer.

问题描述:

What's wrong with John?-He hurt himself_____(play)soccer.

playing
其实是when playing football,踢足球时伤了,把when省略掉就是结果when引导的从句为什么要是正在进行时?哦,意思是说,他在玩球的时候受伤的,所以,应该是(when he was) playing football“习惯于做某事”是be used to doing sth,那“习惯某事”是be used to sth吗?没错,doing sth相当于动名词,也就是sth,是一样的