while与when的区别

详细点whilr与when(当.....的时候)
2024-12-23 05:40:20
推荐回答(5个)
回答1:

when, while这三个词都有"当……时候"之意,但用法有所不同,使用时要特别注意。

①when意为"在……时刻或时期",它可兼指"时间点"与"时间段",所引导的从句的动词既可以是终止性动词,也可是持续性动词。如:

When I got home, he was having supper.我到家时,他正在吃饭。

When I was young, I liked dancing.我年轻时喜欢跳舞。

②while只指"时间段",不指"时间点",从句的动词只限于持续性动词。如:

While I slept, a thief broke in.在我睡觉时,盗贼闯了进来。

辨析

①when从句与主句动作先后发生时,不能与while互换。如:

When he has finished his work, he takes a short rest.每当他做完工作后,总要稍稍休息一下。(when = after)

When I got to the cinema, the film had already begun.当我到电影院时,电影已经开始了。(when=before)

②when从句动词为终止性动词时,不能由while替换。如:

When he came yesterday, we were playing basketball.昨天他来时,我们正在打篮球。

③当从句的谓语是表动作的延续性动词时,when, while才有可能互相替代。如:

While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时,老师进来了。

④当从句的谓语动词是终止性动词,而且主句的谓语动词也是终止性动词时,when可和as通用,而且用as比用when在时间上更为紧凑,有"正当这时"的含义。如:

He came just as (or when) I reached the door.我刚到门那儿,他就来了。

⑤从句的谓语动词如表示状态时,通常用while。如:

We must strike while the iron is hot.我们应该趁热打铁。

⑥while和when都可以用作并列连词。

Mike is tall while his brother is short.迈克的个子很高,然而他弟弟很矮。

Mary was on her way home when two big boys stopped her.玛丽正走在回家的路上,这时两个大个子男孩拦住她。

回答2:

when,while都有“当……时候”的意思。
when既可表示某一点时间,也可以表示某一段时间 。
在when引导的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续性的,可与主句中的谓语动词同时发生,也可在其后发生。

例如:
1、I was just reading a book when she came into my room.
她走进我房间时,我正在看书。
2、Were you writing when the teacher came in?
老师进来的时候,你在写信吗?
3、When he was a child he was always trying out new ideas.
他小时候就常常试验一些新的设想。

(二)、while只能表示某一段时间,不能表示某一点时间。在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。

例如:
1、While Jim was mending his bike, Lin Tao came to see him.
正当吉姆修自行车时,林涛来看他。
2、You can’t do your homework while you’re watching TV.
你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。

例如:
1、While they were talking , the bell rang.
正在他们谈话的时候,上课铃响了。
2、I was doing my homework when my mother came back home yesterday evening.
昨天晚上妈妈回家的时候,我正在做家庭作

注意:
1) 如主句谓语动词表示的是短暂动作,从句时间状语指一段时间,when while as 三者可通用。

例如:
Peter came in while /as I was watching TV.当Peter进来的时候我正在看电视。
I was watching TV when Peter came in. 当Peter进来时我正在看电视。

2) as 和 when 可与非延续性动词连用,而 while 只能与延续性动词连用。
例如:He came in when/ as I was going to bed.我正要上床睡觉,他进来了。

3) as 和 while可用来指一段时间,但 as 强调主句与从句表示的动作同时发生,while强调主句表示的动作是在 while 从句的动作延续中发生。
例如:
As my mother sang those old songs, tears ran down her cheeks.
当我妈妈唱起那些老歌时,眼泪顺着她的脸颊流了下来。
I came in while he was reading an interesting book in his room.

回答3:

when, while这三个词都有"当……时候"之意,但用法有所不同,使用时要特别注意。

①when意为"在……时刻或时期",它可兼指"时间点"与"时间段",所引导的从句的动词既可以是终止性动词,也可是持续性动词。如:

When I got home, he was having supper.我到家时,他正在吃饭。

When I was young, I liked dancing.我年轻时喜欢跳舞。

②while只指"时间段",不指"时间点",从句的动词只限于持续性动词。如:

While I slept, a thief broke in.在我睡觉时,盗贼闯了进来。

辨析

①when从句与主句动作先后发生时,不能与while互换。如:

When he has finished his work, he takes a short rest.每当他做完工作后,总要稍稍休息一下。(when = after)

When I got to the cinema, the film had already begun.当我到电影院时,电影已经开始了。(when=before)

②when从句动词为终止性动词时,不能由while替换。如:

When he came yesterday, we were playing basketball.昨天他来时,我们正在打篮球。

③当从句的谓语是表动作的延续性动词时,when, while才有可能互相替代。如:

While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时,老师进来了。

④当从句的谓语动词是终止性动词,而且主句的谓语动词也是终止性动词时,when可和as通用,而且用as比用when在时间上更为紧凑,有"正当这时"的含义。如:

He came just as (or when) I reached the door.我刚到门那儿,他就来了。

回答4:

两者的区别如下:
①when是at
or
during
the
time
that,
既指时间点,也可指一段时间;
while是during
the
time
that,只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
②when
说明从句的动作和主句的动作可以是同时,也可以是先后发生;while
则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导,如:
a.
When
the
teacher
came
in,
we
were
talking.
当此句改变主从句的位置时,则为:
While
we
were
talking,
the
teacher
came
in.
b.
They
were
singing
while
we
were
dancing.
④when和while
还可作并列连词。when表示“在那时”;while表示“而,却”,表对照关系。如:
a.
The
children
were
running
to
move
the
bag
of
rice
when
they
heard
the
sound
of
a
motor
bike.
孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的声音。
b.
He
is
strong
while
his
brother
is
weak.
他长得很结实,而他弟弟却很瘦弱。
when;
while
当……时候
while能用when代替;
但是when却不一定能用while代替.
while+从句,
动作一定会延续
when+延续性动词/瞬间动词;
when
he
arrived
when
he
died
when,while强调动作同时发生
过去进行时
:
在过去的某一点时间,
或者是过去某一动作同时发生的另外一个动作
瞬间动词(arrive)无进行时态
I
am
arriving
进行时态表示将要
When
he
arrived,I
was
having
dinner.
同时发生的两个动作,
均用过去进行时
When
I
was
doing
my
homework,my
mother
was
cooking.
When
my
mother
was
doing
the
housework,my
father
was
watching
TV.
同时发生的两个动作
1.一个用一般过去时,
另一个用过去进行时
2.分工的情况,
均用过去进行时
When
the
plane
arrived,...were
waiting
inside
the
main
building
while
others
were
waiting
on...
While...
...were
keeping
guard
at
the
door,two
others
opened
the
parcel.
表面上是分工,
两个动作同时发生,
不是同时开始同时结束,
延续时间不一致,
长一点时间的动作用进行时态,
短时间的动作用过去时.
When
someone
knocked
at
the
door,I
was
having
dinner.
when和while引导的时间状语从句与这一时态连用。所以区别when和while的用法成了这一单元的难点。
(一)、when,while都有“当……时候”的意思。when既可表示某一点时间,也可以表示某一段时间
。在when引导的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续性的,可与主句中的谓语动词同时发生,也可在其后发生。
例如:
1、I
was
just
reading
a
book
when
she
came
into
my
room.
她走进我房间时,我正在看书。
2、Were
you
writing
when
the
teacher
came
in?
老师进来的时候,你在写信吗?
3、When
he
was
a
child
he
was
always
trying
out
new
ideas.
他小时候就常常试验一些新的设想。
(二)、while只能表示某一段时间,不能表示某一点时间。在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。
例如:
1、While
Jim
was
mending
his
bike,
Lin
Tao
came
to
see
him.
正当吉姆修自行车时,林涛来看他。
2、You
can’t
do
your
homework
while
you’re
watching
TV.
你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
例如:
1、While
they
were
talking
,
the
bell
rang.
正在他们谈话的时候,上课铃响了。
2、I
was
doing
my
homework
when
my
mother
came
back
home
yesterday
evening.
昨天晚上妈妈回家的时候,我正在做家庭作业。
when/while都可做并列连词.前者表and
at
that
time,(这时,突然),后者表对比,可译为”然而”
I
was
going
downstairs
when
the
telephone
rang.
Lucy
is
in
blue
while
Lily
is
in
green.
when后加瞬间动词
while后也可加持续性动词

回答5:

When和While的区别
①when是at
or
during
the
time
that,
既指时间点,也可指一段时间,while是during
the
time
that,只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
②when
说明从句的动作和主句的动作可以是同时,也可以是先后发生;while
则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导。
④when和while
还可作并列连词。when表示“在那时”;while表示“而,却”,表对照关系。