一、状语从句状语从句是指在整句中作状语时，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，我来为大家科普一下关于英语状语从句中的时间状语精讲?以下内容希望对你有帮助!
英语状语从句中的时间状语精讲
一、状语从句
状语从句是指在整句中作状语时，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。
二、时间状语从句
引导时间状语从句的从属连词有：when, while, before, after, as soon as, until, since，as等。
1.when引导的时间状语从句
when意为"当......的时候"，既可以表示某一时间点发生的事，又可以表示在某一时间段发生的事。主句与从句描述的动作或事情可以同时发生，也可以先后发生。
（1）一个动作发生的时候，另一个动作正在进行。如：When the teacher came into the classroom, we were reading English.
（2）当某一动作正在进行，另一动作发生了。如：When Kate was flying a kite, she found a wallet lying on the ground.
（3）当when从句放在主句之后时，它更强调某一动作的突然性。如：We were watching TV when the telephone rang.＝We were watching TV and suddenly the telephone rang.
2.while引导的时间状语从句
while引导的时间状语从句表示主句的行为在从句行为进行的过程中发生。由于while从句表示一个持续的行为，因此从句要用持续性动词或状态动词，且持续性动词常用进行时态。
（1）while意为"当......的时候"。如：They arrived while we were having dinner.
（2）while意为"而"。如：While my mum was cooking, my father was reading newspapers.
注意：while引导的时间状语从句可以主从句同时用进行时态。when引导的时间状语从句不可以主从句同时用进行时态。
3.before和after引导的时间状语从句
before表示"在......之前"，after表示"在......之后。"如：Turn off the lights before you leave the room./I went to school after I finished my breakfast.
4.as soon as引导的时间状语从句
as soon as表示"一......就......"，强调动作紧密相连。如：My family always go somewhere interesting as soon as the holiday begins.
5.until引导的时间状语从句
（1）until表示动作或状态一直持续到某一时刻，即"直到......"。如：You can walk until you see a building on your left.
（2）主句谓语动词是瞬时动词时，须用否定形式not...until...。如：He didn't go to bed until he finished his homework.（他直到做完作业才睡觉。）
（3）主句中是延续性动词时，谓语用肯定式或否定式，表达意思不同。如：肯定形式：I watched TV until she came back.（我看电视一直看到她回来。）/
否定形式：I did not watch TV until she came back.（直到她回来我才开始看电视。）
6.since引导的时间状语从句
since引导的时间状语从句常与完成时态连用，表示"自从......"。句型如下：
（1）主语 have/has 动词过去分词 since 一般过去时态的句子。
（2）时间has passed since 一般过去时态的句子。
（3）It is/has been 时间 since 一般过去时态的句子。如：She has worked in this factory since she left school./Five years has passed since she went to college./It is/has been five years since she went to college.
7.as引导的时间状语从句
as引导的时间状语从句表示伴随，其动作必须是可持续性的动作。主要是用来强调主句和从句动作同时发生。当然，as也可以用来强调动作的先后顺序。如：He sang as he walk along the road./As we go to the supermarket, it began to rain./As the doctor was checking him, his pain got worse.
三、练习
（一）根据句意，用合适的连词补全句子，使其意思完整。
1.Mother was doing some cleaning_____father was watching TV.
2.She danced_____she sang.
3.He waited for me_____I came back home.
4.He couldn't help crying_____he heard the bad news.
5.It has been ten years_____they left Shanghai.
6._____the doctor was checking her, she suddenly remembered the photo.
7.I'll send an e-mail to you_____I get to London.
8.Lucy didn't fall asleep_____her parents returned last night.
9.Do you turn off the lights_____you leave the room?
10._____I was reading in the room, the telephone rang.
（二）句子翻译。
1.自从她来到上海，她就在这家医院工作。
2.每天吃饭前，我们必须洗手。
3.当天气好的时候，我们通常出去散步。
4.当学生们在教室看书时，老师进来了。
5.当天黑时，他们到家了。
6.她昨天一直等到我们完成了这项工作。
7.我一到广州就会给你们发邮件。
8.他们踢完足球后，就开心地回家了。
9.当他们吃野餐时，天突然下起了雨。
10.自从我们住在这里，我们就交了很多朋友。
*练习参考答案
（一）1.while 2.as 3.until 4.when 5.since 6.As 7.as soon as 8.until 9.when 10.While
（二）1.She has worked in this hospital since she came to Shanghai.
2.We must wash hands before we have meals every day.
3.When it is fine, we usually go for a walk.
4.While the students were reading in he classroom, the teacher came in.
5.As it was getting dark, they arrived/got/reached home.
6.She waited until we finished this work yesterday.
7.I will send email to you as soon as I get to/reach/arrive in Guangzhou./I will send you email as soon as I get to/reach/arrive in Guangzhou.
8.They went home happily after they played football.
9.While they were having a picnic, it suddenly began/started to rain.
10.We have made many friends since we lived here.
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