初中英语语法状语从句讲解及练习附的答案.doc
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初中英语语法专题讲座——状语从句
状语从句在复合句中作状语，修饰动词、形容词或副词等。状语从句可以表示时间、条件、原因、地点、目的、结果、让步、方式、比较等意义。
知识梳理：提纲挈领，抓住重点和难点！
? 各类状语从句连接词（短语）一览表：
时间?when, while, as, as soon as, since, until, after, before，as long as（长达……之久）
条件?If, unless,as/so long as(只要)
原因?As, because, since，as/so long as(既然,因为)
地点?Where
目的?So that(为了), in order that
结果?So that（方便）, so…that, such…that
让步?though, although, even if, however
方式?As
比较?than, (not)as…as,
时间状语从句：
Whenever he comes, he brings a friend. 他每次来都带个朋友。
They all continued their regard for me as long as they lived. 他们毕生都在关心着我.
条件状语从句：
As long as I am alive, I will go on studying. 只要我活着， 我就要学习。
原因状语从句：
Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。
地点状语从句：
Put it where we can all see it.把它放在我们都能看到的位置。
目的状语从句：
Finish this so that you can start another.把这个做完，（为了）你可以开始另一个。
结果状语从句：
He was so angry that he couldnt say a word. 他气得说不出话了。
让步状语从句：
Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。
方式状语从句：
Students do as the teachers say.学生们按照老师说的去做。
比较状语从句：
The work isnt as easy as I thought.这项工作比我想象得难。
例题解析：举一反三，学的更轻松！
1. 易混引导词while, when, as的区别：
when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。如：
When he came in, his mother was cooking.
When (While) we were at school, we went to the library every day.
when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。
While表示时间段,因此，while 从句的谓语动词要用延续性动词。如：
Please dont talk so loud while others are working.
As与when用法相似，但着重强调主句动作与从句动作同时发生，有随着……或一边……一边……之意。如：
As you get older, you get more knowledge.随着年龄的增长，你获得的知识就越多。
在将来时从句中，常用when，且从句须用一般时代替将来时。 ①You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。 ②When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。 when用于表示“一……就……”的句型中（指过去的事情）。 sb．had hardly（＝scar
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