一、考點聚焦
1、時間狀語從句
（1）as、when、while用法一覽表。
類別 作 用 例 句
as as表示“當……的時候”，往往和when/ while通用，但它著重強調主句與從句的動作或事情同時或幾乎同時發生。 She came up as I was cooking.(同時)
The runners started as the gun went off.(幾乎同時)
when (at or during the time that )既可以表示在某一點的時候，又可表示在某一段時間內，主句與從句的動作或事情可以同時發生也可以先后發生。 It was raining when we arrived.(指時間點)
When we were at school, we went to the library every day.(在一段時間內)
while while意思是“當……的時候”或“在某一段時間里”。主句中的動作或事情在從句中的動作或事情的進展過程中發生，從句中的動詞一般要用延續性動詞。在when表示a period of time時，兩者可以互換。 Please don’t talk so loud while others are working.
He fell asleep while/when reading. Strike while the iron is hot.(用as或when不可，這里的while意思是“趁……”)
（2）引導時間狀語從句的連接詞除上述外還有：
①till, not … until …, until, before, since
Don’t get off the bus until it has stopped.
He waited for his father until(till)it was twelve o’clock.
It will be five years before he returns from England.
②hardly / scarcely … when, no sooner … than, as soon as once
表示“一……就”
As soon as I have finished it , I’ll give yu a call.
Once you show any fear, he will attack you.
We had hardly got / Hardly had we got into the country when it
began to rain.
No sooner had he arrived / He had no sooner arrived than she started complaining.
③directly, immediately, the moment, the minute that… 一……就
He made for the door directly he heard the knock.
④each time, every time, by the time
Each time he came to my city, he would call on me.
注意：表示未來情況，主句用將來時，從句用現在時。
2、讓步狀語從句
（1）although與though可以引導讓步狀語從句，不能與but連用，但可以與yet連用。
Although they are poor,(yet)they are warm-hearted.
（2）even if或even though引導讓步狀語從句，表示“即使”，“縱然”，用來使人注意下文所強調內容的性質。
I’ll get there even if(though)I have to sell my house to get enough money to go by air.
（3）no matter后接上who、what、where、how等疑問詞，也可以在這類疑問詞后面加上ever構成whoever、whatever、wherever、however等。
Don’t trust him, no matter what / whatever he says.
Whoever breaks the law will be published.
No matter how hard the work is, you’d better try to do it well.
（4）as也可以引導讓步狀語從句。要用倒裝。
Child as(though)he is, he knows a lot.
Much as I like it, I won’t buy.
Try as he would, he couldn’t lift the heavy box.
3、原因狀語從句：because, for, as, since, now that
（1）表示不知道的原因時用because,即說話人認為聽話人不知道，因此because從句是全句最重要的部分，通常它被置于主句之后。
You want to know why I’m leaving? I’m leaving because I’m full.
for雖然表示不知道的原因，但其語氣較because要弱得多，是可說可不說的話，它只能置于主句之后，這時，for是并列連詞。如果不是因果關系，而是對前面主句的內容加以解釋或推斷時，只能用for。如：It’s morning now, for the birds are singing.（很顯然，鳥叫不可能是“現在已是早上”的原因。）
（2）表示已經知道的原因時用as或since,即某種原因在說話人看來已經很明顯，或已為聽話人所熟悉，因此它是句中不很重要的部分。since要比as正式一些，它們通常被置于語句之前，但有時卻相反。
Seeing all of the children already seated, he said,“Since everyone is here, let’s start.”
(3)下列情況下只能使用because:
①在回答why的問句時；
②在用于強調句型時；
③被not所否定時。
4、地點狀語從句：where, wherever
Make a mark wherever you have any questions.
We will go where the Party directs us.
5、目的狀語從句：that, so that, in order that
注意：目的狀語從句的謂語動詞常與情態動詞連用，否則可能是結果狀語從句。不可置于句首。
6、結果狀語從句：that, so that, so … that, such … that …
注意：so + 形容詞/副詞 + that從句；such + 名詞 + that從句。
7、方式狀語從句：as, as if(though)
I’ll do as I am told to.
It looks as if it is going to rain.
8、比較狀語從句：than, as
9、條件狀語從句：if, unless, so (as) long as, in case, once, a far as, on condition that.
注意if與unless的區別：不能用and連接兩個unless從句，即不能有… unless …,and unless … 。但if … not and if … not卻不受此限。
You won’t lose your weight unless you eat less and unless you exercise more.(×)
但可以說 … unless you eat less and exercise more.
10、注意狀語從句中從句的省略現象
（1）連接詞 + 過去分詞
Don’t speak until spoken to.
Pressure can be incrased when needed.
Unless repaired, the washing machine is no use.
（2）連詞 + 現在分詞
Look out while crossing the street.
（3）連詞 + 形容詞/其他
常見的有it necessary、if possible、when necessary、if any等。
二、精典名題導解
選擇填空
1. I don’t think I’ll need any money but I’ll bring some ____________.
(NMET 2000)
A.as last B.in case C.once again D.in time
解析：答案為B。句意為“帶些錢以防萬一”，只能選擇in case。引導的條件狀語從句，后面省略了I should need it。
2. The WTO can’t live up to its name _________ it doesn’t include a country that is home to one fifth of mankind.（NMET 2000）
A.as long as B.while C.if D.even though
解析：答案為C。本題考查狀語從句的用法。句意為“假如世貿組織不包括占世界人口五分之一的中國的話，那它就名不副實”。as long as語氣過于強烈，while和even though不符合句意。
3、Someone called me up in the middle of the night, but they hung up_________I could answer the phone.(NMET 2000)
A.as B.since C.before D.until
解析：答案為C。題意為：半夜里有人打來電話，我沒來得及就掛了。but暗示在接話前就掛了。
狀語從句
1． ，Mother will wait for him to have dinner together．
A．However 1ate is he B．However he is late
C．However is he late D．However late he is
2．Go and get your coat．It is you left it．
A．there B．where C．there where D．where there
3．I won’t forgive her unless she ．
A．Will apologize B．apologized C．would apologize D．apologizes
4．Why do you want a new job you’ve got such a good one already?
A．that B．where C．which D．when
5．If you go to Xi’an，you’1l find the palaces there more magnificent than commonly ．
A．supposing B．supposed C．to suppose D．suppose
6．Although he is considered a great writer， ．
A．his works are not widely read
B．but his works are not widely read
C．however his works are not widely read
D．still his works are not widely read
7．When you read the book，you’d better make a mark you have any questions.
A．at which B．at where C．the place where D．where
8． the days went on，the weather got worse．
A．With B．Since C．While D．As
9． you go， be honest and modest．
A．Wherever；do B．Wherever；must C．Where；do D．Where；should
10． ，it was finished on time．
A．As was the work difficult B．Difficult as was the work
C．Difficult as the work was D．As the work was difficult
11． everybody is here，let’s begin our meeting．
A．When B．For C．Because D．Since
12．It was he was ill that he was absent yesterday．
A．now that B．since C．as D．because
13．Put the medicine you can easily get it．
A．so that B．where C．which D．there
14．The earth goes around the sun the moon goes around earth．
A．so that B．just like C．as how D．just as
15．No sooner finished my work the boss come
A．had I；when B．I had；when C．had I；than D．I had；when
16． rich one may be，there is always something one wants．
A．Whatever B．Whenever C．However D．Wherever
17．-What was the party like?
- Wonderful．It’years I enjoyed myself so much．
A．after B．before C．when D．since
18．Mother was worried because little Alice was ill．Especially father was away in France．
A．as B．that C．during D．if
19．We won’t give up we should fail 10 times．
A．even if B．since C．whether D．unti1
20．Please let me know you have any more information．
A．the moment B．unless C．as far as D．until
21．Jack and Jim had to wait two more weeks the manager came back．
A．before B．until C．unless D．when
22．Please put back the books you took them．
A．where B．in which C．which D．there
23． you have mentioned it，I’ll remember to look after your dog when you go traveling．
A．Before B．If C．Now that D．Until
24．-What are you going to do this afternoon?
-I’ll probably go for a walk later on it stays fine．
A．as far as B．so long as C．even if D．as if
25．I was about to go to bed there was a knock at the door．
A．whlie B．when C．as D．suddenly
26．He asked me so many questions at a time I didn’t know how to answer．
A．when B．that C．as D．as if
27． again and again，but he didn’t tell me the truth．
A．Having been asked B．Being asked
C．He had been asked D．Though he was asked
28．-Would you like to come to the dinner party here on Saturday?
--Thank you．I’d love to， I’ll be out of town at the weekend．
A．because B．and C．so D．but
29． you want me to fire you，I suggest you stop wearing sports clothes at office．
A．If B．Since C．Unless D．Until
狀語從句
1-5 DBDDB 6-10 ADDAC 11-15 DDBDC 16-20 CDAAA 21-25 AACBB