Question

请教语法问题 English

Answer 1

用that是先行词是人或物，
whose是在句子中做宾语，
who是做主语，
what是先行词是物，
when是时间副词，
which“哪一（类）（个）”。
做这些从句时，先看看先行词是什么再选引导词，也不迟。

Answer 2

when是关系副词，引导时间状语从句。
1．关系代词who、which、that在定语从句中作主语时不能省略，
作宾语时，特别是在口语中可以省略。如：
I
like
the
film
(which)
I
saw
last
night.
我喜欢昨晚看的那部电影。
The
book
(which/that)
you
lent
me
is
very
interesting.
你借给我的那本书很有趣。
2．关系代词whom、which在定语从句中作介词的宾语时，介词可放在whom、which之前，
也可放在定语从句中谓语动词及宾语的后面原来的位置上。当关系代词被省略时，介词必须放在定语从句后面。如：
This
is
the
room
in
which
they
lived
last
year.
或This
is
the
room
which
they
lived
in
last
year.
这是他们去年住的房间。
Is
this
the
key
which
she
was
looking
for?
这是她刚才找的那把钥匙吗？
I
know
the
woman
(whom)
you
talked
to
just
now.
我认识刚才跟你说话的那个妇女。
注：但含有介词短语的动词一般不能分开。如：
The
children
whom
the
nurses
look
after
are
very
healthy.
护士们照料的那些孩子们都很健康。
She
was
the
teacher
(whom)
I
had
been
waiting
for.
她就是我一直在等的那位老师。
3．关系代词that在定语从句中作介词宾语时，介词不能放在它的前面，而只能放在从句中原来的位置上。
如：
This
is
the
room
that
he
lived
in
last
year.
这就是他去年住的那个房间。
Melissa
is
the
student
that
I
borrowed
the
book
from.
梅利莎就是我借书的那个学生
4．关系代词通常紧跟在先行词之后，但有时在先行词与关系代词之间插入其他成分。注意区别：
He
laughs
best
who
laughs
last.
谁笑在最后，谁笑得最好。
（定语从句中的who代替he，在从句中作主语）
There
are
many
thousands
of
stars
in
the
sky
that
are
like
the
sun.
天空中有成千上万颗像太阳一样的恒星。（先行词stars、that在定语从句中作主语，
in
the
sky是地点状语）