English is used as the first language in America.English is used as a second language in India.为什么first 前用the 而second 前用a ?
问题描述：
English is used as the first language in America.
English is used as a second language in India.
为什么first 前用the
而second 前用a ?
答
the是特指,只有一个
a是泛指,指的一类
答
first前用the是第一个
second前用a是又一个
答
"the" is for something unique.
"a" is not unique.
答
后一句的second 是泛指。
答
因为母语是唯一的,而第二外语会有很多