哪些句子中的“介词加关系代词”可以用关系副词替换?

引导定语从句的关系副词有when,where,和why,
其具体用法如下:
1） 当定语从句所修饰的先行词是表示时间的名词时,用when,在定语从句中充当时间状语.在口语中可以用that代替when,也可以用介词+which来代替when.
I will never forget the day when (=that / on which) I went to university.
(when,that or on which 相当于on that day,在从句中作状语.)
The dark days when the imperialists ruled China are gone.
帝国主义统治中国的黑暗时代一去不复返了.
2）当定语从句修饰表示地点的名词时,用where,在定语从句中充当地点状语从句.
Is there a shop around where I can get school things?
附近有什么商店可以买到学习用品吗?
I have found a peaceful place where I can study.
我找到了一个能学习的安静的地方.(where=that or in which)
3）当定语从句所修饰的词是表示原因的词,用why,在定语从句中作原因状语.
This is the reason why he was absent.
这就是他为什么缺席的原因.(why=for which)
I don’t know the reason why he did it.
若是不缺成分就用关系副词
如 I don't like the way he talks to me.
若是缺少成分就用关系代词
如（缺主语）I don't know the person who is talking with my brother.
(缺宾语）I always remember the day (that) we spent together.
介词加关系代词就是关系副词的形式
如I don't know the place in which he lives.