He fell and sprained his ankle.

他跌了一跤，扭伤了脚踝。

He sprained his ankle when playing football.

他踢足球时扭伤了脚脖子。

I stumbled and sprained my ankle.

我摔了一跤，把脚脖子扭了。

He sprained his ankle and had to be helped home.

他扭了脚脖子，我们只得把他架回去。

I fell down and got sprained.

我跌倒扭伤了。