状语从句总结(初二)

初二

状语从句

状语从句（Adverbial Clause）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。状语从句的种类

1.时间状语从句

2.地点状语从句

3.原因状语从句

4.条件状语从句

5.目的状语从句

6.让步状语从句

7.比较状语从句

8.方式状语从句

9.结果状语从句

状语从句讲解

状语修饰动词、形容词、副词或整个句子。通常由副词、介词短语、动词不定式、分词和从句等担当。例如：

1. Naturally , our grandparents were pleased to get our phone call . (副词)

2. We worked hard , from sunrise to sunset . (介词状短语)

3. To help my disabled aunt , I spend an hour working in her house every day . (不定式)

4. Seen from a distance , the farmhouse looked deserted . (过去分词)

5. I know how to light a camp fire because I had done it before .（原因状语从句）

状语的位置比较灵活，可以位于句首、句末或句中。enough用作状语修饰形容词和副词时必须后置。

1.时间状语从句

概念：

在复合句中，由时间连接词引导的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。）

要点:

要点：

由以下连词引导：when while as after before as soon as since till /until by the time 在时间状语从句中，要注意时态一致。一般情况下主句是将来时的时候，从句要用一般现在时。

特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely … when

E.G.：I didn’t realize how special my mother was until I became an adult.

While John was watching TV, his wife was cooking.

The children ran away from the orchard(果园), the moment they saw the guard.

No sooner had I arrived home ,then it began to rain.

Every time I listen to your advice, I get into trouble.

1.when在...的时候

Mozart started writing music when he was four years old.

(在)莫扎特4岁的时候，开始写音乐作品。

2.while在...期间

He visited a lot of places while he was traveling.他在旅行期间参观了许多地方。

3.as在...的同时；一边...一边...

We always sing as we walk.我们总是一边走一边唱。

4.after在...之后

He left the classroom after he had finished his homework .他做完作业之后就离开教室。5.before 在...之前ぃ

Mr. Brown had worked in a bank for a year before he came here.

布朗先生来这里之前已经在一家银行里工作一年了。

6.as soon as 一。。。就。。。

We began to work as soon as we got there.我们一到那就开始工作。

I will write to you as soon as I get home.我一到家就给你写信。

7.since 自。。。以来到现在

表示自过去的一个起始时间点到目前(说话时间)为止的一段持续时间。主句一般用现在完成时，从句用一般过去时。还可以用作介词，本句从句还可以用短语：since three years ago(从三年前至今)表示。

Mr Green has taught in that school since he came to China three years ago.

自格林先生来中国以来，他就在这所学校教书。

8 till /until直到。。。

都可以作连词，连接时间状语，也可以作介词，与其它词构成介词短语，在句中作状语。（强调将一般用until）

They walked till /until it was dark.他们一直走到天黑。

Xiao Ming didn’t leave home till / until his father came ba ck.小明直到他爸爸回来才离开家。

9. by the time 到。。。为止(所在句子的主句应用完成时)

By the time he gets there , his father has already gone.他到家的时候，他爸爸已经走了。

By the time I got to school, the class had already began.我到校时，已经开始上课了。when, while和as的区别

when引导的从句的谓语动词可以是延续性的动词，又可以是瞬间动词。并且when有时表示“就在那时”。

例如：

When she came in, I stopped eating.她进来时，我停止吃饭。(瞬间动词)

When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。（延续性的动词）

We were about to leave when he came in.我们就要离开，就在那时他进来了。(瞬间动词) While引导的从句的谓语动词必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。并且while有时还可以表示对比。例如：

While my wife was reading the newspaper, I was watching TV. (was reading是延续性的动词，was reading和was watching同时发生)

I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比）

As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如：

We always sing as we walk.我们总是边走边唱。（as表示“一边……一边”）

As we was going out, it began to snow.当我们出门时，开始下雪了。（as强调句中两个动