！sprain的名词依然是sprain，动词和名词同形，n. 扭伤和形容词是sprained，中文意思是，扭伤的

A sprained ankle slowed my pace.扭伤了的脚踝骨使我的步伐减慢。

How would you treat a sprained ankle?脚踝骨扭了，(你)怎么治

The nurse will bind up Ed's sprained ankle.