elder/older 这两个词都是形容词old的比较级形式,区别在于: 1.elder指“年长的”,常修饰人,用来表示出生顺序的前后和年龄的长幼,常作定语,不可用于than引导的比较状语从句。例如: The elder sister gave her little sister an apple. 2.older指“年纪较大的,较老的,较旧的”,修饰人或物都行。既可作定语,也可作表语,可用于than引导的比较状语从句。例如: The older man in the photo is my grandfather. We work in an older building. Your bag is older than mine.