Where引导的是地点状语从句还是定语从句，主要有以下两个判定方法：
1.where做为关系副词的定语从句时，先行词要在从句中做成分 ，而where引导的地点状语从句则不需要。
2.若是定语从句，则where前边必然有被修饰的地点名词；若where前边没有被修饰的名词，则视为地点状语从句。
具体分析如下：
一、where引导定语从句时,where是关系副词,在从句中作地点状语,其前面有表示地点的先行词,
where引导的从句修饰先行词.
例:
The shop where I bought this shirt is not far from here.
我买这件衬衫的商店离这里不远。
二、where引导状语从句时,where是从属连词,where引导的从句修饰主句的谓语动词,
where前面没有表示地点的先行词.
例:Make a mark where you have any doubts or questions.
在你有疑问的地方做记号。
I found my books where I had left them.
我在我原来放书的地方发现了我的书。
有时,where引导的地点状语从句兼有抽象条件含义,可放在主句的前面,而where引导的定语从句则不能.
例:Where there is water,there is life.有水的地方就有生命.
三、在有些情况下,where引导的定语从句可转换为where引导的地点状语从句.
例:
A tall building was put up at the place where there used to be a
desert.（＝A tall building was put up where there used to be a
desert.）在以前曾是沙漠的地方盖起了一幢高楼.
Bam boo grows best in places where it is warm and where it rains
often.）温暖而多雨的地方最适合于竹子生长.
最简单的办法是看where是否有指代先行词是定语从句还是状语从句的区别主要可以从以下三点来看：
一、where引导定语从句时, where是关系副词, 在从句中作地点状语, 其前面有表示地点的先行词, where引导的从句修饰先行词。例如:The bookshop where I bought this book is not far from here.This is the house where I lived two years ago.We will start at the point where we left off.
二、where引导状语从句时, where是从属连词, where引导的从句修饰主句的谓语动词, where前面没有表示地点的先行词。例如:Wuhan lies where the Changjiang River and the Han Jiang River meet.Make a mark where you have any doubts or questions.I found my books where I had left them.有时, where引导的地点状语从句兼有抽象条件含义, 可放在主句的前面, 而where引导的定语从句则不能。例如:Where there is a will, there is a way. 〔谚语〕有志者事竟成。Where there is water, there is life. 有水的地方就有生命。三、在有些情况下, where引导的定语从句可转换为where引导的地点状语从句。例如:A tall building was put up at the place where there used to be a desert. （＝A tall building was put up where there used to be a desert. ）在以前曾是沙漠的地方盖起了一幢高楼。Bam boo grows best in places where it is warm and where it rains often. （＝Bamboo grows best where it is warm and where it rains often. ）温暖而多雨的地方最适合于竹子生长。
