关系代词和关系副词的区别,1、主要看它们在句子的功能 2、了解简单句的五种基本结构
关系代词：that/which/who/whom 在句中,做主语、宾语、表语
whose 做定语
关系副词在句中作状语
试比较：
This is the place that/which I visited 3 years ago
This is the place where I worked 3 years ago
分析
that/which I主语 visited 谓语 3 years ago状语,缺宾语,因为修饰物,所以用 that/which
where I 主语 worked 不及物动词作谓语 3 years ago 状语,本句主干不缺成分,所以用where