状语从句用法归纳

1.状语从句即指在主从复合句中用作状语的从句。状语从句根据其用途可分为时间状语从句、地点状语从句、原因状语从句、结果状语从句、目的状语从句、条件状语从句、方式状语从句等。

2.在时间状语和条件状语从句中,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。

3.有时也可见到 if you will 这样的说法,但那不是将来时态,而是表示意愿或委婉的请求(此处的 will是情态动词)

4. because习惯上不与so连用,汉语习惯上说因为所以…”,但英语习惯上却不能将 sobecause 连用。

5.(al)though习惯上不与but连用,汉语中可说虽然但是…”,但按英语习惯,通常不能说although…butthough…but

6.为了简洁起见,有的状语从句(如时间状语从句、条件状语从句等)有时可省略从句的主语和部分谓语(尤其是当从句主语与主句主语一致,且从句谓语包括有动词be)

7.有些由if构成的省略结构,已属固定短语,如if any, if necessary, if possible, if not, if so.

状语从句用法,状语从句的分类及引导词,状语从句知识点归纳 

状语从句的用法讲解

地点状语从句

地点状语从句通常由where, wherever 引导。

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。

原因状语从句

1/because语势最强,用来说明人所不知的原因,回答why提出的问题。2、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。

目的状语从句

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

结果状语从句

such 是形容词,修饰名词或名词词组,so 是副词,只能修饰形容词或副词。 so 还可与表示数量的形容词many, few, much, little连用,形成固定搭配。

条件状语从句

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

让步状语从句

当有though, although时,后面的从句不能有but,但是 though yet可连用

比较while, when, as

1as, when 引导短暂性动作的动词。2、当从句的动作发生于主句动作之前,只能用when 引导这个从句,不可用as while3、从句表示"随时间推移"连词能用as,不用when while

比较untiltill

此两个连词意义相同。肯定形式表示的意思是"做某事直至某时",动词必须是延续性的。否定形式表达的意思是"直至某时才做某事"。动词为延续性或非延续性都可以。

表示"…"的结构

hardly/scarcely…when/before, no sooner…than 和as soon as都可以表示"…"的意思

状语从句的概念:

状语从句指句子用作状语时,起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导,也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开,位于句尾时可以不用逗号隔开。

比较while/as/when

1as/when引导短暂性动作的动词例句:

如:Just as/Just when/When I stopped my car, a man came up to me.

2、当从句的动作发生于主句动作之前,只能用when引导这个从句,不可用aswhile

如:When you have finished your work, you may have a rest.

3、从句表示“随时间推移”连词能用as,不用whenwhile

如:As the day went on, the weather got worse.

比较untill/till

两个连词意义相同,肯定形式表示的意思是“做某事直至某时”,动词必须是延续性的。否定形式表达的意思是“直至某时才做某事”,动词为延续性或非延续性都可以。

正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。

肯定句例句:I slept until midnight. 我一直睡到半夜时醒了。

Wait till I call you. 等着我叫你。

注意:在肯定句中可用before代替:Let's get in the wheat before the sunsets.

否定句例句:She didn't arrive until 6o'clock. 

 I didn't manage to do it until you had explained how.

1Until可用于句首,而till通常不用于句首。

例句:Until you told me, I had heard nothing of what happened.

2Untilwhen疑问句中,until要放在句首。

例句:Until when are you staying? 你呆到什么时候?

注意:否定句可用另外两种句式表示。

1Not until…在句首,主句用倒装。

例句:Not until the early years of the19th century did man know what heat is.

2It is not untilthat

状语从句的用种类:

1、时间状语从句:

表示时间的状语从句可由when, as, while, whenever, after, before, till(until), since, once, as soon as(the moment), by the time, no soonerthan, hardly(scarcely) when, everytime等引导。   

e.g. When I came into the office, the teachers were having a meeting.   

He started as soon as he received the news.   

Once you see him, you will never forget him.   

No sooner had I gone to bed than I went to sleep.   

2、原因状语从句:

原因状语从句是表示原因或理由的,引导这类从句的最常用的连词是because, since, as, nowthat(既然)等,for表示因果关系时(它引导的不是从句)为并列连词,语气不如because强。   e.g. He is disappointed because he didn't get the position.   

As it is raining, I will not go out.   

Now that you mention it, I do remember.   

3、地点状语从句:  

引导地点状语从句的连词是wherewherever等。   

e.g. Sit wherever you like.   

Make a mark where you have a question.   

4、目的状语从句:  

引导目的状语从句最常用的词(组)是so, so that(从句谓语常有情态动词), in order that, in case(以防,以免)等。   

e.g. Speak clearly, so that they may understand you.   

She has bought the book in order that she could follow the TV lessons.   

He left early in case he should miss the train.   

5、结果状语从句:  

结果状语从句是表示事态结果的从句,通常主句是原因,从句是结果。由so that(从句谓语一般没有情态动词),sothat, suchthat等引导。  

e.g. She was ill, so that she didn't attend the meeting.   

He was so excited that he could not say a word.   

She is such a good teacher that everyone admires her.   

6、条件状语从句:  

条件状语从句分真实性(有可能实现的事情)与非真实性(条件与事实相反或者在说话者看来不大可能实现的事情)条件句。

引导条件状语从句的词(组)主要有if, unless, so(as)long as, on condition that, so(as) far as, if only(=if)

注意:条件从句中的if不能用whether替换。   

e.g. If he is not in the office, he must be out for lunch.   

You may borrow the book so long as you keep it clean.   

So far as I know(据我所知), he will be away for three months.   

You can go swimming on condition that(=if) you don't go too far away from the river bank.   

If he had come a few minutes earlier, he could have seen her.  

7、让步状语从句:  

让步状语从句可由although, though, as, even if(though), however, whatever, whetheror, no matter who(when, what,)等引导。

注意as引导的让步状语从句一般是倒装的。  

e.g. Though he is a child, he knows a lot.   

Child a she is, he knows a lot.   

Whatever(=No matter what) you say, I'll never change my mind.   

8、方式状语从句:  

方式状语从句常由as, as if(though), the way, rather than等引导。   

e.g.You must do the exercise as I show you.   

He acted as if nothing had happened.   

9、比较状语从句:  

比较状语从句常用than, so(as)as, the morethe more等引导。   

e.g. I have made a lot more mistakes than you have.   

He smokes cigarettes as expensive as he can afford.   

The busier he is, the happier he feels.

使用状语从句时要注意的几个问题:  

1、在时间和条件(有时也在方式、让步等)从句中,主句是一般将来时,从句通常用一般现在时表示将来。  

e.g. We'll go outing if it doesn't rain tomorrow.   

I'll write to you as soon as I get to Shanghai.   

2、有些时间、地点、条件、方式或让步从句,如果从句的主语与主句主语一致(或虽不一致,是it),从句的谓语又包含动词be,就可省略从句中的“主语+be”部分。  

e.g. When(hewas) still a boy of ten, he had to work day and night.   

If(you are) asked you may come in.   

If(it is) necessary I'll explain to you again.   

3、注意区分不同从句:引导的是什么从句,不仅要根据连词,还要根据句子结构和句意来判别。以where为例,能引导多种从句。  

e.g. You are to find it where you left it.(地点状语从句)  

Tell me the address where he lives.(定语从句,句中有先行词)  

I don't know where he came from.(宾语从句)  

Where he has gone is not known yet.(主语从句)  

This place is where they once hid.(表语从句)

注意:表示“一…就…”的结构 hardly/scarcelywhen/before/no soonerthanas soon as都可以表示“一…就…”的意思。

例句:I had hardly/scarcely got home when it began to rain.

I had no sooner got home than it began to rain.

    As soon as I got home, it began to rain.

注意:如果hardly/scarcelynosooner置于句首,句子必须用倒装结构:

例句:Hardly/Scarcely had I got home when it began to rain.

No sooner had I got home than it began to rain.