when， while及as都能引導(dǎo)多種狀語(yǔ)從句:
一、 when常見考點(diǎn)
1、“當(dāng)……時(shí)候”， 引導(dǎo)時(shí)間狀語(yǔ)從句。
When he was a young man， he was fond of hunting.
It was already 10:00PM，when I finished the work.
2、“正在那時(shí)，這時(shí)”等于and at that time，引導(dǎo)時(shí)間狀語(yǔ)從句。
We were having a meeting when someone broke in.
Wewereabouttoleave when it began to rain.
3、“既然”等于since 或considering that， 引導(dǎo)原因狀語(yǔ)從句。
It was foolish of you to take a taxi，when you should easily walkthere in five minutes.
How can they learn anything when they spend all their spare timewatching TV?
4、“雖然，然而，可是”引導(dǎo)讓步狀語(yǔ)從句。
He usually walks when he might ride.
They had only three chairs when they need five.
二、 while常見考點(diǎn)
1、“當(dāng)……時(shí)候”， 引導(dǎo)時(shí)間狀語(yǔ)從句（從句動(dòng)作必須是延續(xù)性的）。
Please don’t talk so loud while others are working.
While I was cleaning the window， my finger was seriouslycut.
2、“雖然，盡管”相當(dāng)于although，引導(dǎo)讓步狀語(yǔ)從句（常把while放在句首）。
While she is a top student， she has some shortcomings.
While the Internet is bridging the distance between people， itmay also be breaking some home or will cause other familyproblems.
3、“只要，如果”等于as long as，引導(dǎo)條件狀語(yǔ)從句。
There is hope while there is life.
While you study hard， your effort will pay off.
4、“而，然而”，表對(duì)比或相反的情況。
He likes pop music，while I am fond of folk music.
Kids talk frequently about what they can do，while many adults dothe opposite， tending to talk about what they can’t .
三、 as常見考點(diǎn)
1、“一邊……一邊”或“隨著……”，引導(dǎo)時(shí)間狀語(yǔ)從句（as引導(dǎo)的從句內(nèi)部的動(dòng)作與主句內(nèi)動(dòng)作同步）。
John sings as he works. （一邊……一邊）
Jame’s blindness was getting worse as he was getting older.（隨著……）
2、“因?yàn)椤保?引導(dǎo)原因狀語(yǔ)從句。
As you weren’t there， I left a message.
Perhapshe will need some help as he was ill.
3、“盡管，即使，雖然” 引導(dǎo)讓步狀語(yǔ)從句（用于形容詞，副詞或名詞后構(gòu)成部分倒裝）。
Young as I am， I already know what career I want to follow.
Much as I like you， I couldn’t live with you.
Child as Tom is ， he has been a success.
高考題精練
1.（2007山東，29）_______I really don’t like art， I find his workimpressive.
A. AsB. SinceC. IfD. While
2. （2007北京，25） —— Where is that report ?
—I brought it to you ________you were in Mr Black’s officeyesterday.
A. ifB. whenC. becauseD. before
3. （2007四川，29）I’d like to study law at university
________my cousin prefers geography.
A. thoughB. asC. whileD. for
4. （2007重慶，34） ______ ，his idea was accepted by all the people atthe meeting.
A. Strange as might it sound
B. As it might sound strange
C. As strange it might sound
D. Strange as it might sound
5.（2006廣東，26）Jenny was very sad over the loss of the photos shehad shot at Canada， ________this was a memory she especiallytreasured.
A. asB. ifC. whenD. where
6. （2006山東，31）How can you expect to learn anything ________younever listen?
A. in caseB. even ifC. unlessD. when
7. （2006湖南，31）I had just stepped out of the bathroom and wasbusily drying myself with a towel ________I heard the steps.
A. whileB. when C. since D. after
8. （2006遼寧，24）He was about halfway through his meal ________afamiliar voice came to his ears.
A. whyB. whereC. whenD. while
9. （2006天津，2） The cost of living in Glasgow is among the lowestin Britain， the quality of life is probably one of thehighest.
A. sinceB. whenC. asD. while
10. （2005福建，24） —— Did Jack come back early last night?
— Yes. It was not yet eight o’clock ________he arrivedhome.
A. beforeB. whenC. thatD. until
11. （2005上海，34）He transplanted the little tree to the garden________it was the best time for it.
A. whereB. whenC. thatD. until
12. （2004全國(guó)I ，35）I do every single bit of housework， ________myhusband Bob just does the dishes now and then.
A. sinceB. whileC. whenD. as
13. （2004全國(guó) ，21）Don’t be afraid of asking for help ________it isneeded.
A. unlessB. sinceC. althoughD. when
14. （2004浙江 ，31） ________modeling business is by no means easy toget into， the good model will always be in demand.
A. WhileB. SinceC. AsD. If
15. （2004江蘇 ，23） ________I accept that he is not perfect， I doactually like the person
A. WhileB. SinceC. BeforeD. Unless
The key: 1-5DBCDA6-10DBCDB11-15BBDAA
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