2022年中考英语专题复习——状语从句知识点讲解

状语从句知识点讲解
定义：在句中作状语的从句叫状语从句，修饰主句中的谓语部分。
考点：状语从句有九种，其主要考点为各类连接词，理解句子即可。
分类 连接词
时间状语从句 when, while, as, before, after, since, until/ till， not…until, as soon as
条件状语从句 if, unless，as long as
地点状语从句 where, wherever
原因状语从句 because, since, as
目的状语从句 so that, in order that
结果状语从句 so…that, such…that
让步状语从句 although/though, even if/ though, wh-+疑问词, no matter+疑问词
比较状语从句 as……as，not as/so……as, ……than
方式状语从句 as,as if, as though
一、时间状语从句
（1）when/while/as
when 引导的时间状语从句意为“当…时候”，表示从句和主句的动作先后或者同时发生。从句中的谓语动词可以用短暂性动词也可以用延续性动词。
例如：When the teacher came in, we were talking.
When I first arrived on this country, I had nothing.
While 引导的时间状语从句意为“当…时候”，表示从句和主句的动作同时发生。从句中的谓语动词必须用延续性动词。
例如：I was sleeping while Tom was watching TV.
3) as 引导的时间状语从句意为“一边…一边”，强调主句和从句的动作同时发生。
例如：She sang as she worked.
练一练：
1.________ you came in, I was talking with a few boys.
2.It started to rain __________ we were playing outdoors.
3.They talked _________ they walked down the river.
4.__________ it was raining, the students were playing basketball.
5.Tom watched TV__________ he ate supper.
（2）before指主句的动作发生在从句的动作之前。
after 指主句的动作发生在从句的动作之后。
例如： I’ll be back before. 你离开之前我就会回来。
What will you do after you graduate 你毕业之后想要干什么？
（3） since引导的时间状语从句，从句的谓语动词通常为一般过去时，主句的谓语动词通常为现在完成时
例如：He has been worried since the letter arrived. 自从收到信，他就一直很担心。
（4）till和until同义，意为直到，till多用于非正式文体，until多用于句首; 其主句的谓语通常是延续性动词。当主句的谓语是短暂性性动词时，通常用否定形式，即not until，意为直到…才。、
例如：He waited until she had finished speaking.
I won’t go with you until I finished my homework.
（5）as soon 意为一…就，表示从句的动作一发生，主句的动作立马就发生。
例如：As soon as we get there, he will tell us the news. 我们一到那，他就会告诉我们那个消息。
二、条件状语从句
（1）if引导的条件状语从句意为如果。
例如：If I were you, I’d start looking for another job.
（2）unless意为除非，相当于if…not。
例如：I sleep with the window open unless it’s really cold.
（3）as long as 意为只要
例如：We’ll go as long as the weather is fine.
注意: 含有时间和条件状语从句的复合，需遵循主将从现的原则。
例如：I’ll tell you everything when I come back.
练一练：
1. I’ll ring you up as soon as I ______（get）to New York.
2 .I will tell him everything when he ______ (come) back.
3. He won’t believe it until he ______ (see) it with his own eyes.
4. —Shall we go climbing the hill this weekend
—Good idea! We will go climbing if it _________.
A．wasn’t raining B．isn’t raining C．doesn’t rain D．won’t rain
5.-Could you ask him if he to my birthday party next Sunday
-I will, if I him this afternoon
A. comes; meet B. will come; will meet
C. comes; will meet D. will come; meet
三、地点状语从句
常用where引导，例如：The bus will take you where you’re going.
四、原因状语从句
常由because, since, as引导。because引导的从句语气最强, since比because弱，as的语气最弱，附带原因和理由。
例如： The food taste great because I am so hungry.
Since no one is against it, we’ll do that.
As you were go out, I left a message.
五、目的状语从句
常由in order that/so that引导，意为“为了……，目的是”。
例如：He should talk to his friend so that he can say he’s sorry.
I am saving money in order that I can buy a car.
六、结果状语从句
连接词： so……that; such……that. “如此……以致于……”
such和so用法辨析：
用法 常用结构
such 修饰名词 such a/an +形容词+可数名词单数 such+形容词+名词
so 修饰形容词或副词 so+ 形容词+a/an + 可数名词复数 so+ many/few /much/little +名词
例如：Such a little girl can speak so many languages.
This is such a useful book that everyone likes it.
七、让步状语从句
连接词though/ although 引导的从句意为虽然，即使，不能和but连用。
even if/ even though意为即使，语气更强。
疑问词+ever 可以和no matter +疑问词互换。
例如： Although she’s wrong, it’s not a big deal.
I’ll go there, even if I have to walk.
Whatever decision he made I would support it.
八、比较状语从句
在句中表示比较的从句，常由as, than 引导。
例如：Maybe by the end of this term, you will be as tall as I am.
The result was better than I expected.
九、方式状语从句
在句中表示方式的从句，常由as, as if, as though引导。
例如：You should do as Paul tells you.
He treats his elder brother as if he was a stranger.