Question

定语从句中that和wich、who等词的用法

Answer 1

that,
which
和who在定语从句中做关系代词，指代人或物。
1）that和which主要在定语从句中做主语或宾语，指代物；
比如：This
is
the
place
which/that
I
visited
last
year
2）who在定语从句中做主语，指代人；
比如：The
girl
who
is
standing
under
the
tree
is
my
younger
sister.
3)
有几种情况只能选择that:
1.当先行词是或被序数词，最高级，不定代词修饰时，关系词用that不用which。
　　
2.当先行词既有人又有物时，用that。
　　
3.当先行词带有the
only,the
very,the
same,the
last,the
one等词时，用that不用which。
　　
4.当主句中有who或which时，为避免重复用that
希望帮到你！
欢迎追问！

Answer 2

1、
who指人，是主格，在定语从句中作主语。例如：
This
is
the
girl
who
is
the
most
beautiful
in
our
school.
2、whom指人，是宾格，在定语从句中作宾语，可省略。例如
This
is
the
girl
whom
I’d
like
to
make
friends
with.
3、whose既可指人又可指物，是所有格，在定语从句中作定语。例如：
This
is
the
girl
whose
father
is
our
headmaster.
This
is
the
tree
whose
branches
are
dead.
4、
that既可指物也可指人，既是主格又是宾格，在定语从句中既作主语又作宾语，作宾语时可省略。例如：
①This
is
the
bike
that
was
stolen
yesterday.
②Have
you
found
the
key
that
your
brother
lost?
③This
is
the
doctor
that
fights
bravely
against
SARS.
④Li
Ping
is
the
student
that
our
teacher
often
praises.
5、
which只可指物，既是主格又是宾格，在定语从句中既作主语又作宾语，作宾语时可省略。例如：
This
is
the
book
which
can
help
you.
This
is
the
pen
which
you
lost
yesterday.