介词+
关系代词"引导的
定语从句关系代词whom,
which在定语从句中作介词的宾语时,可以跟介词一起放在主句和从句之间;当
先行词指人时,介词后的关系代词用whom,
其余用which,这时的关系代词不能省略;有时为了使关系代词紧跟它所修饰的先行词,也可以把介词放在从句中有关动词的后面,这时的which可用that替换。当介词放在从句有关动词的后面时,关系代词which,
that,
whom在口语中和非正式文体中经常省略。如:
This
is
the
room
in
which
he
used
to
live.
=
This
is
the
room
(which
/
that)
he
used
to
live
in.
这是他过去居住过的房间。
Who's
the
man
with
whom
you
just
shook
hands?
=Who's
the
man
(that
/
whom)
you
just
shook
hands
with?
刚才你与他握手的那个人是谁?
但含有介词的短语动词一般不拆开,介词仍放在动词的后面。如:
This
is
the
book
(which
/
that)
I'm
looking
for.
这就是我在找的那本书。
在这类定语从句中,介词的选择一般根据动词的需要,如上述几例,或者根据先行词来决定。如:
There
is
a
mountain
of
which
the
top
is
always
covered
with
snow.
有一座山顶总是覆盖着雪的山。