最简单的办法是看where是否有指代先行词应到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 Rivermeet.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 adesert. （＝A tall building was put up where there used to be adesert. ）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 rainsoften. ）温暖而多雨的地方最适合于竹子生长。
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