As的用法小结是什么？

Question

如题所述

Answer 1

As的用法小结
as可以作连词、介词及关系代词和副词。现将其用法小结如下:
（一）、
as作连词的用法:
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、
while的用法区别。
①下列情形时,只用as,
而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边.
如:
The
girl
sings
as
she
goes
to
school.
He
looked
behind
occasionally
as
he
went
forward
in
the
forest.
2)表示两个同步发生的动作或行为,意思是随着-----的发展.如:
As
time
went
on
/
by,
she
became
more
and
more
beautiful
.
As
children
get
older,
they
become
more
and
more
interested
in
everything.
3)表示两个短暂行为或事情几乎同时发生.如:I
watched
her
as
she
read
the
book.
I
thought
of
it
just
as
you
opened
your
mouth.
Just
as
the
flying
worm
hit
her
face,
she
gave
a
loud
cry.
4)接在名词后面表示某一个年龄段时.如:
As
a
young
man,
he
was
active
in
sports.
②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。如:When
I
was
at
college,
I
could
speak
several
foreign
languages.
When
the
clock
struck
twelve,
I
had
slept
for
2hours.
③
while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work
while
you
work.
Play
while
you
play.
2.
As
=Since
作"既然"、"由于"解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如:
As
he’s
been
ill
for
ages,
I
will
help
him.
As
/
Since
you're
not
feeling
well,
you
may
stay
at
home.
As
he
wasn't
ready
,
we
went
without
him.
3.
As
=in
the
way
that作"像"、"按照……的方式"解,引导方式状语从句。如:
Do
as
I
told
you.
Remember,
you
must
do
everything
as
I
do.
4.
用于as---
as或not
/
so/
as
----
as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They
helped
the
old
as
much
as
possible.
I
don't
speak
English
so/
as
well
as
she
does.
5.
表示虽然,尽管
等,引导让步状语从句,常用倒装语序,模式为:
adj.
/adv.
/
n.+as
+主语+谓语+主句。如:
Young
as
he
is,
he
knows
much.
Tired
as
they
were,
they
walked
on.
6.
表示也------一样。
She
is
a
doctor,
as
was
her
husband.
（二）、
as作关系代词,引导定语从句,表示正如,这一点.如:
He
is
very
careful,
as
we
all
know.
As
is
well-known,
Taiwan
belongs
to
China.
另外,当先行词被the
same,
such等词修饰时,常用as来引导定语从句。如:
Such
a
clever
girl
as
she
can
learn
anything
quickly.
I
was
reading
the
same
book
as
he
bought
yesterday.
（三）、as作介词的用法.
1.表示好像。如:He
dressed
as
a
policeman.
2.
表示作为当作。如：I
found
a
job
as
a
guide.
3.
当某人是某身份时。如：As
a
child
,
she
was
sent
to
abroad.
4.
as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如:
As
a
Party
member,
I'll
take
the
lead
in
everything.
(状语)
She
works
as
a
model.
(状语)
She
has
me
as
one
of
her
best
friends.(引起宾语补足语)
（四）、作副词的用法
1
表示与------等同。如：This
dress
is
twice
as
expensive
as
that
one.
2
像，如等。如：As
before,
he
remained
unmoved.
总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。