介词加关系代词等于
介词加关系代词都等于哪些词？
介词加关系代词都等于哪些词？
“介词加关系代词”等于另外一个词，是出现在定语从句中的一种现象。“介词 关系代词”起一个关系副词的作用，相对于一个关系副词。
in/on/at/during/… which=when
in/on/at/… which=where
for which=why
例句：
1. This is the factory in which he worked.
这是他曾经工作过的工厂。
in which=where
2.This is the farm on which he worked.
这是他曾经工作过的农厂。
on which=where
3.This was the reason for which he was late for school.
这是他为什么迟到的原因。
for which=why
关系代词前面的介词怎么填？
关系代词前面的介词究竟用哪个，主要是根据主句中的先行词和从句中的谓语动词来确定。
例句：
1.The film about which they are talking in a foreign film.
他们正在谈论的电影是一部外国电影。
句子中的介词about就是根据主句中的先行词是film,从句的谓语动词talk来确定的，因为讨论…，谈论…这个短语是talk about…
2.This is the house in which he lived many years ago.
句子中的介词in就是根据主句中的先行词是house,从句的谓语动词是live来确定的，因为住在……地方(名词)，这个短语是live in…。
关系代词前面的介词怎么填？
1. 介词 关系代词=关系副词when/where。若先行词是时间名词，介词就应该是表示时间的介词；若先行词是地点名词，介词就应该是表示地点的介词。至于用哪个介词，这要看句意和前面的先行词。如
This is the house where(=in which)he once lived.
There is a table where(=on which) lies a map of China.
There is a farm where(=on/at which) lived 50 people.
I#39ll never forget the day when(=on which) I joined the Party.
We will always remember the days when(=in which) we worked together.
June 4th is her birthday when(=on which) she will invite all her friends to her birthday party.
He died from a traffic accident at 6:30 am, when(=at which) we were sleeping.
2. 介词提前时，要看句子的动词：是及物动词还是不及物动词，以及动词与介词的搭配。如：
I know the boy with whom you will go.
The man to whom you referred is my uncle.
注意：动词短语是固定搭配,不可分割时,那么动词短语的介词一般不能提前，如look after,look for, take care of, hear of, hear from等。
The man whom/who she is looking after is her daddy.