Question

关系代词which在定语从句中作定语

RT……不明白，希望有例子+比较易懂的解释，谢谢

Answer 1

关系代词 which 一般指物，在定语从句中作主语、宾语或定语，既可引导限制性定语从句，又可引导非限制性定语从句。下面就进行归纳总结：
1. 引导限制性定语从句
A shop should keep a stock of those goods which sell best.
商店应存有最畅销的货物。
This is the family which is planning to move to the party.
这是要搬进城里的一家。
2. 引导非限制性定语从句。
（ 1 ）用来指代一个句子。
Internet is so interesting, which makes all possible happen.
因特网是如此有趣，它使任何事都有可能发生。
（ 2 ）用来指代句子的一部分。
When deep in thought, which he often was, he would forget all around him.
他常常陷入沉思，这时他就会忘掉周围的一切。
（ 3 ）如果要引导两个非限制性定语从句，第二个 which 前要加 and.
He bought a book, which was written by LuXun, and which he decided to give to his friend.
他买了本鲁迅写的书，他决定送给朋友。
3. 名词＋ of ＋ which （＝ of which ＋名词＝ whose + 名词）通常放在先行词的后面。
I'd like a room the window of which looks out over the sea. / I'd like a room of which the window looks out over the sea. / I'd like a room whose window looks out over the sea.
我要一间窗户面临大海的房间。
4. 介词＋ which 的替代作用。
（ 1 ）作时间状语替代 when 。
There used to be a time at which / during which （ = when ） the Chinese people struggled for freedom.
中国人曾有一段为自由而斗争的日子。
（ 2 ）作地点状语替代 where 。
This is the office in which （ = where ） I used to work.
这是我过去工作过的办公室。
（ 3 ）作原因状语替代 why 。
I'd like you to explain the reason for which （＝ why ） you were absent.
我想让你解释一下缺席的原因。
（ 4 ）作方式状语替代 that 或省略。
There are many ways in which （＝ that / 省略） we can solve the problem.
解决这个问题有很多方法。

Answer 2

定语是用来修饰、限定、说明名词或代词的品质与特征的。 主要有形容词此外还有名词、代词、数词、介词短语、动词不定式（短语）、分词、定语从句或相当于形容词的词、短语或句子都可以作定语。

引导定语从句的“whose+名词”，有时可换成其他结构：

破了窗户的那座房子是空的。

The house whose windows are broken is empty.

The house the windows of which are broken is empty.

其中，of which结构中的which在定语从句中就是做定语，指代先行词the house,在定语从句中做定语修饰the windows,相当于the house's windows
.