您好,where 可以引导什么从句需要看其(词性)而定:
1)where 作为(连接副词),可以引导:主语从句、宾语从句、表语从句,和同位语从句,比如:
I don't know where he is.(where 引导宾语从句)
This is where I put the book.(where 引导表语从句)
2)where 作为(关系副词),可以引导:定语从句,比如:
This is the city where I grew up.(where 引导定语从句,修饰先行词 city)
3)where 作为(从属连词),可以引导:地点状语从句,比如:
I will take you where it is quiet enough for you to study.(where 引导地点状语从句)
where 作为(特殊疑问词),可以引导特殊疑问句,但这个不是从句结构。