where句型：
(1) where 引导的定语从句
例：This is the house where he lived last year. 这就是他去年住过的房子。
(2) where 引导的状语从句
例：Where there is a will，there is a way.有志者事竟成。
He left his key where he could find.他将钥匙放在易找到的地方。
I will go where I want to go.我要去我想去的地方。
(3) where引导的表语从句
例：This is where you are wrong.这正是你错的地方。
注：引导状语从句的where= 介词+the place where (定语从句)例：Go where(ver) you are most needed.到最需要你的地方去