备战高考英语 考点一遍过 专题32 条件状语从句(含解析)

高考频度：★★★★★

一、条件状语从句 1. if引导的条件状语从句

if可引导非真实条件状语从句(见＂虚拟语气＂)和真实条件状语从句。 If he said that, he can’t be telling the truth. 如果他说了那样的话，他不可能是说实话。 2. unless引导的条件状语从句

unless引导的是否定条件状语从句，在意义上相当于if...not，而且语气较强，一般不用于虚拟语气。

You’ll be late unless you hurry. 你会迟到的，如果不赶快的话。

________ we have enough evidence, we can't win the case. A. Once B. As long as C. Unless D. Since 【答案】C

【名师点睛】条件状语从句就是在复合句中表示主句动作发生条件的状语从句。引导条件状语从句最经常用的连词是if，它的意思是＂如果＂； 也可以用unless引导：unless的意思是＂如果不＂＂除非＂，相当于if not。Zx.xk

3. only if引导的条件状语从句

only if在引导条件状语从句时意为＂只有……(才)；只有在……的时候，唯一的条件是……＂。

I’ll let you use the car only if you keep it in good condition. 只要你把车保养好，我就让你用。

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4. as/so long as引导的条件状语从句 as/so long as意为＂只要；如果＂。

As long as it doesn’t rain, we can play. 只要不下雨我们就能玩。

You won’t find paper cutting difficult _____you keep practicing it. A. even if C .as if 【答案】B

B. as long as

D. ever since

5. provided (that)/providing (that)引导的条件状语从句 provided (that)/providing (that)意为＂假如；如果＂。

I will agree to go provided / providing (that) my expense is paid. 假如为我负担费用，我就同意去。

Providing you promise not to tell anyone else I’ll explain the secret. 假如你承诺不告诉别人，我就告诉你这个秘密。

6. on condition that（条件是）和suppose / supposing (that)（假设；如果）也可引导条件状语从句

I can tell you the truth on condition that you promise to keep it a secret. 我可以告诉你，条件是你答应保守秘密。

Suppose/ Supposing (that) they refuse us, who else can we turn to for help?

在条件状语从句中，通常要用一般现在时表示将来意义，而不能直接使用将来时态。不过，有时表示条件的 if之后可能用 will，但那不是将来时态, 而是表示意愿或委婉的请求(will为情态动词)。

If you will sit down for a few moments, I’ll tell the manager you’re here. 请稍坐片刻，我这就通知经理说您来了。 二、方式状语从句

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表示行为方式的状语从句常由as（依照……，像……一样），as if（正如……，似乎……），as though（似乎……，好像……），（just）as... so...（正如……）引导，多置于主句之后。

1.as，(just) as... so...引导的方式状语从句通常位于主句后，但在(just) as...so...结构中位于句首，这时as从句带有比喻的含义，意思是＂正如……＂，＂就像＂，多用于正式文体。

Always do to the others as you would be done by. 你希望人家怎样待你，你就要怎样待别人。

As water is to fish, so air is to man. 我们离不开空气，犹如鱼儿离不开水。 Just as we sweep our rooms, so we should sweep backward ideas from our minds. 正如打扫房屋一样，我们也要扫除我们头脑中落后的东西。

2.as if，as though两者的意义和用法相同，引导的状语从句谓语多用虚拟语气，表示与事实相反，有时也用陈述语气，表示所说情况是事实或实现的可能性较大。汉译常作＂仿佛……似的＂，＂好像……似的＂。

They completely ignore these facts as if (as though) they never existed.他们完全忽略了这些事实，就仿佛它们不存在似的。（与事实相反，谓语用虚拟语气。）

He looks as if (as though) he had been hit by lighting. 他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）

It looks as if the weather may pick up very soon. 看来天气很快就会好起来。（实现的可能性较大，谓语用陈述语气。） 【名师点睛】

as if / as though也可以引导一个分词短语、不定式短语或无动词短语。 He stared at me as if seeing me for first time. 他目不转睛地看着我，就像第一次看见我似的。

He cleared his throat as if to say something. 他清了清嗓子，像要说什么似的。

The waves dashed on the rocks as if in anger. 波涛冲击着岩石，好像很愤怒。

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1. He looked at me curiously _______________ he had some doubt which he was unwilling to express. A.as if

B.in case

C.unless

D.so that

【答案】A

2. More people will eat out in restaurants _______________ they do today. A. than

D. as

B. when

C. while

【答案】D

【解析】句意：正如人们现在所做的一样，更多的人将会在饭店吃饭。as在此引导方式状语从句，表示＂如同，照……的方式＂。

题组一 能力过关 单项填空

1. This medicine is quite beneficial to your recovery after the operation,______ you take it as told. A. unless since

2.I'll be out for some time. ______ anything important happens, call me up immediately.

A. In case B. if that

3.She says that she'll have to close the shop ________ business improves. A. if

B. providing C. considering D.

As D. Now

C. Even though

B. unless C. after D. when

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4.She says that she'll have to close the shop ________ business improves. A. if

B. unless

C. after

D. when

5. The house was greatly damaged by the truck. We’d better leave things __________ they are until the police arrive. A. since C. though

B. as D. unless

6. The two boys had so much in common as if they ____________ brought up in the same family.

A. should be C. have been

B. would be D. had been

7. —Do you remember the experiment we did together many years ago? —Yes, ____________ we did it yesterday. A. as if C. only if

B. even if D. if only

8. My daughter stared at me, angrily, ___________ I were her wicked stepmother. A. even if C. if only

B. only if D. as if

9. Mrs. Sue looked __________ she was going to explode when the boy cut in line. A. even though C. in case

B. as though D. now that

10. For years, those journalists would describe the event in detail __________ they themselves had attended it. A. as though C. only if

B. in case

D. even though

单项填空

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3.B 【解析】考查状语从句中连词的选择。句意：她说除非生意有改善，否则她将不得不

关闭这家商店。unless意为＂除非＂，符合语境。

4.B 【解析】考查状语从句中连词的选择。句意：她说除非生意有改善，否则她将不得不

关闭这家商店。unless意为＂除非＂，符合语境。

【名师点睛】条件状语从句就是在复合句中表示主句动作发生条件的状语从句。引导条件状语从句最经常用的连词是if，它的意思是＂如果＂； 也可以用unless引导：unless的意思是＂如果不＂＂除非＂，相当于if not。

5.B 【解析】考查状语从句。句意：卡车对这座房子造成了严重的损害。我们最好保持

原样，等待到来。as引导方式状语从句，意为＂按照……的方式＂。leave things as they are意为＂任其自然＂。

6. D 【解析】此处as if引导方式状语从句，且从句应用虚拟语气。主句用的是一般过去

时，从句表示对过去情况的虚拟，故从句谓语形式为had done。所以选D。

8. D 【解析】考查状语从句。句意：女儿生气地瞪着我，好像我是她的后妈一样。空

处表示＂似乎，好像＂，引导方式状语从句。根据句意可知选D。

9. B 【解析】考查状语从句。句意：当那个男孩插队时，Sue夫人看起来像要发怒了。根

据句意可知，要用as though，意思是＂看起来好像……＂，在此引导方式状语从句。even though＂即使＂；in case＂以防＂；now that＂既然＂。

10. A 【解析】考查as though引导的方式状语从句。句意：多少年来，那些记者们总是可

以详细地描述那起事件，就好像他们亲自参与了一样。根据句意可知，此处应用as though引导方式状语从句。

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