(1) a day after; after a day = 一天后/经过一天 (a) He died a day after his wife left him. (b) After a day staying in hospital, he died peacefully. (2) a few days ago = 几天前(谷歌翻译错误:日前) (a) He died a fews days ago (b) His wife left him a few days ago. He died yesterday.
