状语从句。状语从句在句中相当于副词做状语，又叫副词性从句。状语从句分为时间状语从句、条件状语从句、地点状语从句、原因状语从句、目的状语从句、让步状语从句、结果状语从句和比较状语从句。
掌握状语从句应当引导词入手，注意引导词的词义，状语从句。
状语从句在句中相当于副词做状语，又叫副词性从句。状语从句分为时间状语从句、条件状语从句、地点状语从句、原因状语从句、目的状语从句、让步状语从句、结果状语从句和比较状语从句。掌握状语从句应当引导词入手，注意引导词的词义，引导状语从句的引导词都有词思，所以，了解引导词的意思尤为重要。
引导词按意义分为九类：
1)时间when , as , while , till , until , before, after , since
2)地点where
3)原因because , as , since , now that
4)条件if , unless , once .so (as)long as . in case
5)让步though , whatever (-ever) as, even though, even if
6)目的so that, in order that
7)结果so ..that
8)比较than, as ..as
9)方式as , as if
例如：1．i fell asleep when ( as , while ) he was doing his exercises .
他正作练习时我睡着了。（时间状语从句）
2．when he arrived in shanghai , his mother met him at the station .
他到上海时，他妈妈到车站接他。（时间状语从句）
3．she always sings as she walks .
她总是一边走一边唱。（时间状语从句）
4．i waited until he had finished his work .
我等到他做完活。（时间状语从句）
5．it was not long before he told me about this affair .
不久，他就告诉我这件事。（时间状语从句）
6．he has worked very hard since he entered the factory .
自从他进厂，工作一直很努力。（时间状语从句）
7．after he had finished the work , he went home .
他干完活，回家了。（时间状语从句）
8．where there is a will，there is a way .
有志者，事竟成。（地点状语从句）
9．she didn't come to school because she was ill .
她由于有病没来上学。（原因状语从句）
10．as he did not know much english , he looked up the word in the dictionary .
由于他不懂什么英语，所以查字典。（原因状语从句）
11．now that ( since ) i've told you twice , you must know it .
既然我告诉你两次了，你必须记住。（原因状语从句）
12．once he says that , he will do it .
一旦他说了，他就会做。（条件状语从句）
13．unless i receive the letter from him , i won't write to him again .
如果我不收到他的信，就不给他写回信。（条件状语从句）
14．so long as you work hard , you are sure to succeed .
只要你努力工作，就一定能成功。（条件状语从句）
15．thoughwewere neither very big nor very strong , we were a good team .
虽然我们个儿不大，身体不壮，但是个好队。（让步状语从句）
16．no matter who she is , she'll h**e to wait .
无论她是谁，也得等。（让步状语从句）
17．poor as he was , he was honest .
虽然他很穷，但很诚实。（让步状语从句）
18．it also shows you the caller's telephone numberin order that you can recognize who it is .
它能向你显示打**人的号码以便能够认出是谁。（目的状语从句）
19．he was so excited that he could not say a word .
他如此激动以至于说不出话来。（结果状语从句）
20．he works as hard as he used to .
他工作与过去一样努力。（方式状语从句）
21．you must do as i told you .
你必须按我告诉你的去做。（方式状语从句）
运用状语从句应注意的几个问题：
1)状语从句中用一般现在时代替一般将来时。
2)because不与so连用，表示"因为。所以"二者只能选择其一；though ( although )不与but连用，表示"虽然。但是" ,二者只能选择其一。
3)同一引导词可以引导不同种类的从句。如： where
you'll find itwhere it was .(地点状语从句)
tell me the addresswhere he lives . 定语从句)
i don't knowwhere he came from . 宾语从句)
where he has goneis not known yet . 主语从句)
this is where they once lived . 表语从句)
since , as, when也分别可以引导不同种类的从句。
练习题。i .填入适当的引导词。
1. i h**en't heard from him __he went to america .
won't be here __he is invited .
3. he will not go to the cinema __he is very busy .
4. we found the key __she lad left it .
5. we found the books two days __he had gone away .
6. we had no sooner got to the station __the train left .
7. he speaks english __he were an englishman .
is explaining clearly __they could understand .
9. do not le**e the room __you h**e finished the test .
10. she sang __she went along .
答案： ii.改错。
1. the children were running on the playground as fast as they can .
her husband had died , so she had to supporther family .
高中英语状语从句讲解
时间状语从句。在句子中起时间状语作用的句子称为时间状语从句，可放在句首，句中或句末。常用引导词有 when,while,as 当。的时候 一边 after在。之后 before 在。之前 since自从 ever since 自从 till 直到 until 直到 as soon as 一。就。on...
高中英语地点状语从句讲解
1.引导地点状语从句的从属连词有where，wherever等。we should go where the party needs us most.我们应到党最需要我们的地方去。you are free to go wherever you like.你愿意去 就去 where there is ...
高中英语语法时间状语从句讲解
时间状语从句。一 时间状语从句的定义。用表示时间的连词连接一个句子作状语，这样的主从复合句就是时间状语从句。连接时间状语从句的连接词有 when,before,after,while,as soon as,until,since.如果主句是一般将来时，从句只能用一般现在时表示将来意义。二 时间状语从...