请问定语从句如何判断用关系代词还是关系副词

简单的来说关系代词就是指代个人啦,物啦之类的,人的时候：whose,who,whom,that,物的时候：which,that
关系副词就是：介词+which,when,where,why,that,指代地点啊时间啊或者原因啊
最简单的方法就是：删掉关系副词,从句还是完整的,语法正确的.如：
There are occasions when (on which) one must yield.任何人都有不得不屈服的时候.
one must yield.人必须屈服
Beijing is the place where (in which) I was born.北京是我的出生地.
I was born我出生鸟
Is this the reason why (for which) he refused our offer?这就是他拒绝我们帮助他的理由吗?
he refused our offer 他拒绝我们的帮助了
但是关系代词就不可以啦,因为它指代的是一个很实际的东西嘛.不可或缺!缺了的话从句肯定不完整有错误.
Is he the man who/that wants to see you?
wants to see you 这是没主语的句子哦
He is the man whom/ that I saw yesterday.
I saw yesterday 除了口语的I SEE.其他see后面必须要加东西啊!
Please pass me the book whose (of which) cover is green.
cover is green.定冠词丢了哦!错句子.╮(╯_╰)╭
这个你百试百灵的,就是看到关系词,遮住,读后面的从句,完整就是关系副词,错句就是关系代词.
我有点墨迹,加油↖(^ω^)↗