英语定语从句中in which,for which,at which这些介词是根据什么决定的？

英语定语从句中in
which,for
which,at
which这些介词，是根据谓语动词和被修饰的先行词之间的搭配关系决定的。
例如：
This
is
the
school
in
which
I
studied
10
years
ago.
The
task
for
which
he
is
responsible
has
been
completed.
The
palace
at
which
I
called
5
years
ago
is
now
being
rebuilt.

当way做先行词,并在定语从句中做状语时,关系词用that或in
which或省略
先行词是the
way时，其后的定语从句关系词有三种，例如：
i
like
the
way
in
which
/
(that)
the
teacher
gives
his
lessons.
从句缺少的是主语、宾语还是状语是确定用关系代词还是关系副词的关键。也就是说要看先行词在定语从句中担任什么成分
试比较：
i
will
never
forget
the
day
(which/that)
i
spent
in
hongkong.
(
spent是及物动词，后缺宾语，因此用关系代词或省略
)
i
will
never
forget
the
day
when/on
which
hongkong
returned
to
its
motherland.
（
从句主谓宾结构完整，缺状语，因此用关系副词或介词加关系代词
）
the
reason
（that/which）he
gave
for
not
coming
to
school
yesterday
is
unbelievable.
(
gave是及物动词，后缺宾语，因此用关系代词或省略
)
the
reason
why
he
didn’t
come
to
school
yesterday
is
unbelievable.
（
从句主谓宾结构完整，缺状语，因此用关系副词或介词加关系代词
）
希望我的回答对你有帮助

根据定语从句中从句的谓语，谓语需要什么介词搭配，就用这个介词+which.
　　例如：
It
is
an
old
house
in
which
my
grandfather
live.我爷爷住的房子是一间旧房子。
　　这个定语从句的主句是it
is
an
old
house,
从句是in
which
my
grandfather
live
(which
指代主句中的house，
就是my
grandfather
live
in
the
house.)
从句中的谓语是live，
live
和house连用时，用介词in
,
所以就是in
which
了。