状语从句(9种全)

状语从句

在复合句中作状语的从句叫状语从句。状语从句有时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。

一、时间状语从句

引导时间状语从句的连接词有: when, as, while, after, before, since, ever since, as soon as, once, till, until, whenever, no sooner…than, hardly/scarcely...when, the

moment/minute/instant/second, every time, each time, any time, the first time, next time, last time, all the time, by the time, directly, immediately, instantly等。

1.表示“一···就···”的句型

1) as soon as/once

As soon as he arrives, I'll call you.他一到，我就给你打。（as soon as 侧重时间或动作先后衔接紧，而once侧重条件，表示“一旦...”）

2) on doing sth/on one's + n.作时间状语

On arriving at the station, the thief was arrested.

一到达车站，这个小偷就被逮捕了。

On his arrival in Paris, he was recognized as a noble and thrown into prison. 他一到达巴黎，就被认出是一个贵族，并被投入监狱。

3) no sooner ...than , hardly/scarcely...when

它们表“一…就”。结构中的否定词放在句首时，主句要倒装。（主句都用过去完成时，从句用一般过去时。）

No sooner had he reached home than it began to rain.

他刚到家，天就开始下雨了。

Hardly/Scarcely had I entered the room when the phone rang.

我一进屋，就响了。

当no sooner, hardly, scarcely不放在句首时，主句不倒装，如：

I had no sooner reached the bus stop than the bus started.

我刚到车站，车就开走了。

I had scarcely（hardly）entered the room when the phone rang.

4）the moment, the instant, the minute, the second

The moment I saw him, I recognized him.

我一看见他，就认出了他。

We'll leave the minute you are ready.

你一准备好，我们就出发。

5)有些副词如：instantly, immediately, directly可用作连词，后接从句。

I left immediately the clock struck 5.

我刚走，钟就敲了五点。

2. when, while, as引导时间状语从句

1) when的用法

①when既可指时间点，也可指时间段（即：从句动词可以是短暂的也可是延续的）；主从句动作可同时也可先后发生。

I was thin when I was a child.

当我是个孩子的时候,我很瘦。

It was raining when I arrived.我到达时，天正在下雨。

②在when引导时间状语从句时，如果从句主语与主句主语相同或为it，且从句有be动词，则从句可省主语和be动词，如：

When (you are) in trouble, you can visit this man.

当你有麻烦时，可以找这个人。

She is always listening to music when（she is) doing her homework. 当她做作业时，总是听音乐。

③when在下列结构中, 译成“这时”,它引导的是并列句

be about to do ... when, be doing ... when, had done ···when,

be on one's way ... when, be on the point of doing ... when（参见“连词”部分when 的用法）

2）while用法

while只能指一段时间，从句中的动词必须是延续性动词。强调某一段时间发生主句动作，相当于during the time that....

My mother was cooking while I was doing my homework.

当我在做作业时，妈妈在做饭。

I am safe while I am here.我在这儿的时候，我很安全。

while除引导时间状语从句外，还引导对比句，作“然而”讲；并可在句首引出让步状语从句作“虽然···但”讲。

I like watching TV, while he likes reading.

我喜欢看电视，而他喜欢读书。

While he has his own car, he often uses mine.

尽管他自己有车，他却常用我的。

3) as的用法

①as引导时间状语从句时常可和when换用，但较强调同时发生，多指短暂动作。As I left the house, I forgot the key.我离家时，忘了带钥匙。

②as还可说明两种正在发展或变化的情况，“随着...”的意思，表时间的推移。如：As I get older, I get more optimistic.

随着年龄的增长，我变得更加乐观。

③as表“一边…一边…”，引出伴随动作。

He hurried home, looking behind as he went.

他匆忙地回家，边走边往后看。

④用以强调两个动作紧接着发生。

As he was going out, it began to rain.

当他出去的时候，天开始下雨了。

⑤as有时引出一个名词，相当于一个时间状语从句。

As a boy (when he was a boy), he was hopeless at maths.

当他是孩子时，他对数学失去希望。

3. before引导的时间状语从句

①before引导的时间状语从句不用否定式谓语。

Before they got to the bus stop, the bus had gone.