把
从句单独拎出来 然后把引导词去掉 看看句子是不是完整的
1.如果完整 那这个引导词就是关系副词 例如
Beijing is the place where (in which) I was born.
去掉where (in which)剩下 I was born.完整句子
2.不完整 引导词就是
关系代词 此时该引导词一定在从句中作成分 例如
He is the man whom/ that I saw yesterday.
这里把whom/ that去掉后剩下 I saw yesterday.明显缺少宾语
3.但是有一个例外那就是引导词作主语的定语时 也是关系代词 例如
They rushed over to help the man whose car had broken down.
这里把whose去掉后剩下 car had broken down. 也是完整句子 只是这里whose作定语修饰car 所以是关系代词 其实这时候应该whose car一起去掉 然后就是缺少主语了