北京市高考英语一轮复习 第18讲 状语从句(上)2(1)

第18讲状语从句经典精讲（上）

开篇语

开心自测

开心自测讲解

题一：

Jack wasn’t saying anything, but the teacher smiled at him ___he had done something

very clever.

A. as if

B. in case

C. while

D. though

题二：

To show our respect, we usually have to take our gloves off ______ we are to shake

hands with.

A. whichever

B. whenever

C. whoever

D. wherever

题三：

__________all of them are strong candidates, only one will be chosen for the post.

A. Since

B. While

C. If

D. As

题四：

____ regular exercise is very important, it’s never a good idea to exercise too

close to bedtime.

A. It

B. As

C. Although

D. Unless

主要考点梳理

地点状语从句

地点状语从句通常由where, wherever 引导。

Where there is a will, there is a way.

Wherever you go，I’m right here waiting for you.

方式状语从句

方式状语从句通常由as, (just)as...so..., as if, as though引导。as，

(just)as...so...引导的方式状语从句通常位于主句后，但当(just)as...so...结构位于句

首时，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.

As water is to fish, so air is to man.

Just as we sweep our rooms, so we should sweep backward ideas from our minds.

as if, as though

两者的意义和用法相同，引出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。译作“仿佛……似的；好像……似

的”。

They completely ignore these facts as if (as though)they never existed.

He looks as if ( as though)he had been hit by lighting.

It looks as if the weather may pick up very soon.

原因状语从句

比较because, since, as和for的用法：

because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知的，就用as或since.

I didn’t go, because I was afraid.

Since / As the weather is so bad, we have to delay our journey.

由because引导的从句如果放在句末，且前面有逗号，则可以用for来代替。如果不是说明直接原因，而是多种情况加以推断，就只能用for.

He is absent today, because / for he is ill.

He must be ill, for he is absent today.

目的状语从句

表示目的状语的从句可以由 so that, in order that, lest, for fear that, in case 等词引导。

You must speak louder so that / in order that you can be heard by all.

He wrote the name down for fear that(lest)he should forget it.

Better take more clothes in case the weather is cold.

结果状语从句

结果状语从句常由so...that或such...that引导。so...that与such...that之间可以转换。

The boy is so young that he can’t go to school.

He is such a young boy that he can’t go to.

条件状语从句

连接词主要有 if, unless, as / so long as, on condition that等。

Let’s go out for a walk unless you are too tired.

If you are not too tired, let’s go out for a walk.

让步状语从句

though, although引导的让步状语从句，后面的从句不能有but，但是 though 和yet 可连用。

Although it’s raining, they are still working in the field.

He is very old, but he still works very hard.

Though the sore is healed, yet a scar may remain.

as, though 引导的让步从句必须将表语或状语提前(形容词、副词、分词、实义动词原形提前)。

Child as / though he was, he knew what was the right thing to do.

ever if, even though“即使”。

We’ll make a trip even though the weather is bad.

whether...or...“不管……都”。

Whether you believe it or not, it is true.

“no matter ＋疑问词”或“疑问词＋－ever”。