看看从句是不是完整的 如果缺少主语或者宾语 就选which 如果成分齐全啥都不缺 就选where 另外where=in+which 仔细看看从句里有没有in噢

　　同学您好： This is the house where we lived last year. This is the house which we lived in last year. This is the house in which we lived last year. 这三个句子都真正确。 where 是关系副词，在定语从句中是状语 which是关系代词哦，在定语从句中做主语或宾语。 判断用where还是which，主要是识别定语从句是否缺成分。

　　where是关系副词，which是关系代词。where 指地点，在定语从句中作状语，后面应是一个完整的句子。来看一个例子感受一下This is the house where we lived last year. which在定语从中作主语或宾语，后面是一个非完整的句子。来看一个例子感受一下A dictionary is a book which gives the meaning of words.

　　where 后面加的是完整句子，which后面接不完整句子。

　　把从句修饰的先行词拿回到从句中看看是应该放在某个介词后连同介词一起构成一个表示地点的状语，还是做主语或者是动词的宾语。所以才有where=介词+which的用法。