哈罗德在黑暗中摔了一跤，扭伤了脚脖子。 Harold didn't keep his footing in the dark and sprained his ankle.
当我扭了脚脖子时，我的邻居不厌其烦地帮助我。她帮我购买所有的物品并每天帮我去遛狗。 My neighbour was a good Samaritan when I sprained my ankle. She did all my shopping and took the dog for a walk every day.