lindsay-recollect

区别状语从句中的when, while和as的用法
————新洲三中英语组 陈红英
一.when,while,as在时间状语从句中的区别:
①三者均可表示“当……的时候”,如果主句表示的是短暂的动作,而从句表示的是一段
时
间,三者可通用。如:
I met Kang Li as/when/while I was
walking along the street.当我沿街散步时碰见了康丽。
②when
可以和延续性动词连用,也可以和短暂性动词连用;而while和as只能和延续
性动词连用。 如:
It was snowing when we got to the
airport.当我们到达机场时,天正下着雪。(不能用while)
③as强调主句与从
句表示的动作同时发生,as常表示“随着……”;“一边……,一边……;
while强调主句表示的
动作持续于while所指的整个时间内;when可指主、从句所述动作同
时或先后发生。如:
As the time went on,the weather got
worse.(as表示“随着……”之意)
He sang as he went
along.他边走边唱。
Please write while I
read.我读的时候,请写下来。
When he reached home,he had a
little rest.回到家后,他休息了一会儿。
④when用于表示“一……就……”的句型中(指过去的事情)。
somebody
had hardly(=scarcely) done …when...=Hardly /
Scarcely had somebody
done …when...
①I
had hardly /scarcely closed my eyes when someone
knocked at the door.=Hardly
/ Scarcely had I
closed my eyes when someone knocked at the
door.我刚一闭上眼,
就有人在敲门了。
二.when,
while和as都可引导让步状语从句:
①.when引导让步状语从句,意为“尽管,虽然”相当于though或although:
They stopped trying when they might have
succeeded next time.
②while引导让步状语从句,相当于although ,是较为正式的书面语:
While I am willing to go, I would like it
better that you went.
③as引导让步状语从句必须倒装,从句中的表语,状
语或动词原形置于句首,若表语为名
词,前置时省略冠词。
Child as he
is, he knows a lot.
Much as I like it, I will
not buy it, for it’s too expensive.
Try as he
might, he couldn’t find a job.
三.when和while可用作并列连词:
①when作并列连词,意为“突然,正在那个时候”常运用于以下句型中:
Somebody be about to do…when…
Somebody be
on the point of doing…when…
Somebody be doing…
when…
Somebody had done…when…
We were
having a meeting when someone broke in.
We
were about to set off on our way, when it suddenly
began to rain.
②作并列连词,意为“而,却”,表示对比。
He likes pop music, while I am fond of
music.
四.when和as用于原因状语从句中:
①when=since,
now that… “既然”
Why do you want a new job when
you’ve got such a good one already?
②意为“因为”,指说话双方都知道的原因。
As he was not ready
in time, we went without him.
组题练习:
1. Success came ______ she began to play
leading parts in radio plays.
A. While B.
as C. when D. if
2. The atmosphere gets
thinner and thinner _______ the height increases.
A. When B. as C. while D. since
3. I was just about to go to sleep______ there
was a loud knock on the door.
A. While
B. when C. as D. since
4. They were
surprised that a child should work out the
problem_____ they themselves couldn’t.
A. When
B. where C. until D. while
5. We were
swimming in the lake______ suddenly the storm
started.
A. When B. while C. until
D. before
6. I do every single bit of
housework______ my husband Bob just does the
dishes now and then.
(04高考广西卷)
A. Since
B. while C. when D. as
7. _____ I
accept that he is not perfect, I do actually like
the person.(04高考江苏卷)
A. While B. Since
C. Before D. Unless
8. Jasmine was
holidaying with her family in a wildlife park_____
she was bitten on the leg by a
lion.(04高考上海卷)
A. When B. while C. since D.
once
9. _____modeling business is by no
means easy to get into, the good model will always
be in
demand.(o4高考浙江卷)
A. While B.
Since C. As D. If
10. All gases and
most liquids and solids expand ______ heated.
A. as B. while C. before D. when
11. We have only three books______ we need
five.
A. as if B. if C. when
D. even though
can we explain it to
you_____?
A. while you are listening
B. unless you will listen
C. as you won’t
listen D. when you won’t listen
13._______ I had to work to support my family.
A. When I was a little child B. While I
was a little child
C. As I was a little child
D. Before I was a little child
14._____________, helicopters flew to the
burning building.
A. While the firefighters
were trying to control the fire
B. As the
firefighters were trying to control the fire
C. As soon as the firefighters were trying to
control the fire
D. After the
firefighters had controlled the fire
15. The
husband was looking after the baby__________.
A. after his wife cooked in the kitchen
B.
as his wife was cooking in the kitchen
C.
when his wife was cooking in the kitchen
D.
while his wife was cooking in the kitchen
16.
Look at the sun. It is shining._______ it’s sunny,
let’s go for a walk.
A. as B. when
C. if D. as soon as
17. The sad mother sat
on the roadside,shouting_______ she was crying.
A. what B. when C. as D. which
18. Hardly had we entered the room ______ it
began to rain.
A. while B. as C.
then D. when
19. ___________, he does get
annoyed with her sometimes.(04).
A.
Although much he likes her B. Much although he
likes her
C. As he likes her much D.
Much as he likes her
20.______ years go
by,China is getting stronger and richer
. A.
When B. As C. While D. Since
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