第1个回答 2019-04-24
从一道高考题综述while的用法
先看下面一道高考题:
-I\”m
going
to
the
post
office.
-________you\”re
there,
can
you
get
me
some
stamps?
A.
As
B.
While
C.
Because
D.
If
对连词的用法考查在每年高考题中均有涉及。Because引导原因状语从句,
If引导条件状语从句,按题干提供的情景均不可取。While和As都能引导时间状语从句,极易混淆。As一般强调主句谓语动词与从句谓语动词动作的同时性,而While除可表示同时性外,还含有一个动作在另一个动作正在进行或持续过程中的某一时刻发生。再从题干所提供的情景判断,就可知道B为最佳答案。
while的用法可从下述几点理解与运用。
一、while意为\"当......时候\",指一段时间,不能用来表示一个时间点。
While
the
discussion
was
still
going
on,
George
came
in.
当讨论还在进行时,乔治走了进来。
二、while意为\"而;然而\",表示转折。
There\”re
plenty
of
rain
in
the
southeast,
while
there\”s
little
in
the
northeast.
东南部雨量充足,而西北部则很少下雨。
三、while意为\"虽然;尽管\",表示让步。
While
I
admit
his
good
points,
I
can
see
his
shortcomings.
尽管我承认他的优点,但我还是能看到他的缺点。
四、while意为\"只要\",表示条件。
We
can
surely
overcome
these
difficulties
while
we
are
closely
united.
只要我们紧密地团结一致,一定能克服这些困难。
五、while从句中的省略。
当while从句中的主语与主句的主语一致,且含有be的某种形式时,从句中的主语连同be可同时省略。
While
listening
to
the
radio,
she
fell
asleep.
她在听收音机时睡着了。
While
in
London,
he
studied
music
and
painting.
在伦敦时,他学习音乐和绘画。
六、while可用作名词,意为\"一会儿;一段时间\"。
作名词用时,主要用于短语中:
after
a
while
\"过了一会儿\";
all
the
while
\"一直,始终\";
a
short
/
little
while
ago
\"刚才\";
once
in
a
while
\"偶尔,间或\";
wait
/
rest(for)
a
while
\"等
/
休息一会儿\"。
I
haven\”t
seen
her
for
a
long
while.我好久没有看见她了。
Where
have
you
been
all
this
while?这一阵子你到哪去了?
He
usually
goes
to
work
by
bike,
but
once
in
a
while
he
goes
by
bus.
他通常骑自行车上班,但偶尔也乘公共汽车。
I
looked
everywhere
for
the
letter,
but
it
was
in
my
pocket
all
the
while.
我到处找那封信,却不知它一直在我口袋里。
七、while与when以及as之间的区别。
1.
当从句中的谓语动词是持续性的动作时,我们可以用while,
when或as。
While
/
When
/
As
I
was
walking
down
the
street,
I
noticed
a
police
car
in
front
of
the
bank.我顺着马路往前走时,发现银行门前停着一辆警车。
2.
当从句中的谓语动词表示瞬间动作时,不可用while。
He
was
on
the
point
of
leaving
when
someone
knocked
at
the
door.
他正要走,这时有人敲门。
3.
如果谈论两个长动作,最常用的是while。
While
John
was
sitting
biting
his
nails,
I
was
working
out
a
plan
to
get
us
home.
约翰坐在那里咬指甲时,我想出了一个回家的办法。
不过,
as是可以用来说明两种正在发展或变化的情况的,这时as引导一个持续性的动作,主句中的动作与之同时进行。
As
we
talked
on,
he
got
more
and
more
excited.
我们继续往下谈的时候,他越来越兴奋。
4.
如果表示两个短动作或事件同时发生,最常用的是as或just
as,也可用when。
Just
as
he
caught
the
ball,
there
was
a
tearing
sound.
当他抓住球的时候,有一种撕裂的声音。
I
thought
of
it
just
when
you
opened
your
mouth.
就在你要说话的时候,我也想到了。