我们坐前排吧，这样我们看得更清楚些。

School was closed early in order that the children might go home ahead of the storm.

早点儿放学是为了让孩子们在暴风雨到来之前回家。

He took the name down for fear that he should forget it.

他把名字写下省得忘了。(该从句中一般用情态动词should+动词原形，或省略should)

Better take more clothes in case the weather is cold.

最好多带些衣服以防天气会冷。

注意：so that引导的目的状语从句只能放在主句之后，in order that 引导的目的状语从句可以放在主句之前或之后。

6.条件状语从句

分为真实条件句和非真实条件句(用在虚拟语气中)。

表示条件的状语从句可以由if(如果),unless(除非), in case(万一), so /as long as(只要), as/ so far as(就……而言), on condition that(条件是……)suppose(假设)supposing(假设)(仅用在问句中)

等词或词组引导。一般情况下当主句是将来时的时候，从句要用一般现在时。

As/So long as we don’t lose heart, we’ll find a way to overcome the difficulty.

只要我们不灰心，我们就能找到克服困难的方法。

Send us a message in case you have any difficulty.万一你有什么困难，请给我们一个信儿。

If you leave at 6 o’clock tomorrow morning, you’d better get to bed now.

如果你明早6点钟走，你最好现在就上床。

We’ll let you use the room on condition that you keep it clean and tidy.

只要你能保持整洁，我们可以让你使用这个房间。

As/So far as I know, he is an expert on DNA.据我所知，他是一个DNA专家。

He’ll accept the job unless the salary is too low/ if the salary is not too low.

他会接受这项工作的，除非薪水太少/如果薪水不太少的话。

Suppose/Supposing we can’t get enough food, what shall we do?

假设我们弄不到足够的食物，那我们怎么办?

7.让步状语从句

由下列连词引导：although,though,as,even if, even though,while,whether…or,whoever,whatever,however,no matter+疑问词等。

We won’t be discouraged even if(=even though) we fail ten times.

我们就是失败十次也不泄气。

It was an exciting game, though / although no goals were scored.

那是一场精彩的球赛，尽管一个球都没进。

Whether you believe it or not, it’s true.不管你信不信，这是真的。

However (=No matter how) expensive it may be, I’ll take it.无论它有多贵，我也要买下它。

Don’t let them in, whoever(=no matter who) they are.不管他们是谁，别让他们进来。

No matter what I say or how I say it, he always thinks I’m wrong.无论我说什么或怎么说，他总认为是我错。

注意以下几点：

①although,though引导让步状语从句时，主句前不能用but,但可以加yet,stil。

He refuses help although he has many friends who want to offer all kinds of help.

②as引导让步状语从句时，必须用前置结构，通常是从句中的表语、状语或动词原形放在句首，放在句首的名词前的冠词要去掉。

Child as(though)he is, he knows a lot.(注意在child前不要用冠词)

Much as I like it, I won’t buy.

Try as he would, he couldn’t lift the heavy box.

8.方式状语从句

由下列连词引导：as,as if,as though,the way等。

Do it the way you were told.

注意以下几点：

①as引导方式状语从句时意义为“按照”，“如同”，前面常用加强语势。

I did it just as you told me.

②as if和as though 引导的从句中，谓语常用虚拟语气，有时也用陈述语气。

③连词while 和whereas 可表示对比。

Whereas he is rather lazy,she is quite energetic.

9.比较状语从句

由下列连词引导：as…as,not as…as,not so…as,than等(详情请参见【专题三】形容词和副词)。

10.注意状语从句中的省略现象

①连接词+过去分词

Unless repaired, the washing machine is no use.

②连词+现在分词

Look out while crossing the street.

③连词+形容词/其他

常见的有if necessary、if possible、when necessary、if any等。

④比较状语从句中的省略句。如：He arrived home half an hour earlier than (he had been)expected.

精品小编为大家提供的高中英语状语从句知识点，大家仔细阅读了吗?最后祝同学们学习进步。

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