这是由where引导的名词性从句,相当与一地点名词.
以下是有关where的一些知识,
地点状语从句表示地点、 方位,这类从句通常由where引导.
where they were before Katrina 是由where引导的地点状语从句,简单地说你可以把它看成一个地点吧,这样就好理解了吧.
例如:
1.We must camp where we can get water.
我们必须在能找到水的地方露营.
2.Go back where you came from.(where引导地点状语从句)
你从何处来到何处去.
3.He advised me to live where the air is fresher.
他建议我去住在空气更新鲜的地方.
4.If you are traveling where the customs are really foreign to your own,please do as the Romans do.
where 可以引导定语从句:
例如:
5.Please go back to the place where you come from .
请回到你原来的地方.
你问得我都有点模糊,