when在句子中是什么成分,相当于名词+介词吗?
问题描述：
when在句子中是什么成分,相当于名词+介词吗?
答
when 作为关系副词,在定语从句中做时间状语,相当于介词+关系代词
I still remember the year when we met for the first time. (when= in which )
Sunday is the day when very few people go to work（when= on which）
when做疑问副词,When can you come?