初中时间状语从句语法及练习全
时间状语从句(含练习及答案)
以when 引导的时间状语从句- When I got home, my son had finished his homework. (主句动作发生在从句之前)- When(当...时候, 主语+did) we arrived, it was raining.- When(正当...时候，主语+be+doing) I was playing the computer games, my mum came in. - He is always nervous when he speaks to strangers.- I usually walk to school when it rains.以while 引导的时间状语从句- While I was reading, my brother was playing with his toy cars. (主从句子动作同时发生)- While/When/As he was studying in the library, I saw him. (表示一段时间时，while/when/as 可替换)while引导的从句的谓语动词必须是持续性动作:I saw him while(x) I was getting off the bus.(x)I saw him when/as I was getting off the bus.以as 引导的时间状语从句- He will grow wiser as he grows older. 随着年龄的增长，他会聪明起来。
（随着，表示时间的推移，这时，不用when/while）- He entered the room as/when/while the meeting was going on. 正当开会的时候，他走进房间。
以before引导的时间状语从句- He had washed his hands before he had dinner. (主句动作先于从句动作)- Please clean the house before you move in.以after 引导的时间状语从句- She went on holiday after she had taken the examination. (从句动作先于主句)- You can watch TV after you finish your homework.以since 引导的时间状语从句- She has been in the house since she came to the city. (主句完成时态，从句过去时)- I have taught them English since last year.以as soon as引导的时间状语从句- I will write to you as soon as I get to America. 我一到美国就会给你写信。
初中状语从句总结及练习(附答案)
状语从句1. 时间状语从句2. 条件状语从句3. 原因状语从句4. 结果状语从句5. 比较状语从句6. 目的状语从句7. 让步状语从句8. 地点状语从句用来修饰主句中的动词，副词和形容词的从句叫状语从句。
根据其含义状语从句可分为时间状语从句，地点状语从句，条件状语从句，原因状语从句，结果状语从句，比较状语从句，目的状语从句，让步状语从句。
1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。
例如：It was raining hard when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里，通常不用将来时态，用现在时态表示将来的动作或状态。
例如：I’ll ring you up as soon as I get to New York.I will tell him everything when he comes back.He won’t believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里，如果主句用肯定式，其含义是“一直到……时”，谓语动词只能用延续性动词。
如果主句用否定式，其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。
时间状语从句及其练习题
状语从句一、时间状语从句一、时间状语从句 1、 as soon as “一、、、、、、就、、、、、、”引导时间状语从句的连词有引导时间状语从句的连词有The moment immediately The minute directly He instant instantly No sooner than Hardly had sb , done done…… when ….did ….. Scarcely when The moment she comes, I’I’ll call you. ll call you. She left immediately the meeting was over. Hardly had he got off the bus when he heard a loud noise. 2、 when ,while , as 引导时间状语从句引导时间状语从句时间点时间点 段时间段时间 区 别 When 主从同时；先后主从同时；先后 While 主从同时主从同时 对比对比 As 主从同时主从同时（一边、、、一边）、一边）It was raining when we arrived. My mother came in when I was doing my homework. While /when I was doing my homework, my mother came in. I am safe while I am here. He hurried home, looking behind as he went. As I left the house, I forgot the key. 主从句时态主从句时态Will you please bring me your book when you come here tomorrow? I will go home when I have finished my work . When / while 连词引导并列句连词引导并列句Was/ were about to do …Was /were going to do …. Was/were on one ’s way …Was .were on the point of doing …. When …. Was/were doing Was/were doing……. (“这时” 表同时) Had done …Jasmine was holidaying holidaying with with with her her her family family family in in in a wildlife a wildlife park when she w as was was bitten bitten bitten on on on the the the leg leg leg by by by a a lion. ………….while .while ………….(.(“然而”“然而” 表反比) I do every single bit of housework while my husband Bob just does the dishes now and then. 3、before 引导时间状语从句引导时间状语从句1）“还没等”（谓语不用否定式）（谓语不用否定式）Before they got to the bus stop, the bus had gone. 2) “….. (之后)才/就”It was evening before we reached the little town of Winchester. 3)固定句型：固定句型： It will (not) be some time before …………do do …… It was (not) some time before ….did ….. It won ’t be long before …………dodo do............ It wasn ’t long before (i)did did…….. 4 . until /till （ till 不用于句首或强调句）不用于句首或强调句） 引导时间状语从句引导时间状语从句1）…..not ….until/till .until/till……直到……才 He didn ’t go to bed until he had finished his work 2) …...until …...until /till /till …..直到……为止为止We were told that we should follow the main road until we reached the railway station . 3)强调句式强调句式It is not until …that … It was not until midnight that he went back home after the experiment. 4) not until 放在句首时，主句半倒装。
初中状语从句之时间状语从句：知识点总结+习题(word版,无答案)
初中状语从句之时间状语从句：知识点总结+习题（word版，无答案）状语从句——时间状语从句1, 由when 或whenever 引导, when 指的是“某一具体的时间”, whenever 指的是“在任何时间”。
Eg: When I came into the room, he was writing a letter. 当我进屋时, 他正在写信。
Eg: We shall go there whenever we are free. 我们什么时间有空, 我们就去那里。
2, when 意为“这时”或“在那个时候”,可以看作是并列句,这种用法的when 分句一般位于句末。
Eg: I was walking along the street when suddenly someone patted me on the shoulder from behind.我正在街上走着, 这时忽然有人从后面拍我的肩膀。
3, while 指“在某一段时间里”, “在…期间”, while 引导的动作必须是持续性的。
Eg: While it was raining, they went out. 天下雨的时候, 他们出去了。
I stayed while he was away. 他不在的时候我在。
4, as 引导持续性动作, 强调主句和从句的动作同时发生。
Eg: He hurried home, looking behind as he went. 他赶快回家, 不时地一边走一边向后看。
5, 由before 或after 引导。
Eg: Be a pupil before you become a teacher. 先做学生, 再做先生。
Eg: He arrived after the game started. 比赛开始后, 他到了。
6, 由till 引导。
如主句动词是持续性动作, 常用肯定式, 表示“直到…为止”。
初中英语时间状语从句讲解及练习.doc
语法29 时间状语从句一、什么是状语从句状语就是在一句话中表示该句子的时间、地点、方式、原因、条件等成分。
状语从句就是用一个从句表示状语。
状语从句根据它表达的意思不同，可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等九类。
与状语一样，状语从句的位置比较灵活。
既可置于主句之前（通常用逗号与主句隔开），也课置于主句之后（不需要用逗号与主句隔开），有时甚至可以置于主句之中。
二、时间状语从句1.主句和从句同时发生，这类从句由从属连词when, while, as引导。
He was hungry when he came home.I was crying while everyone was laughing.As I walked out, he walked in.as, when, while, 的区别①as强调从句的动作与主句动作同时发生及持续，具有at the same time的意思他继续往下谈的时候，越来越兴奋。
as还可以表示一边……一边……，强调从句和主句中两个动作交替进行或同步进行。
他们边走边聊。
as还有“随着”的含义随着春天的到来，天气暖和起来。
②when强调动作点的特定时间，具有at the time that的意思当老师走进来的时候，我们都站起来了。
③while表示较长的期间，具有during the time that的意思当我在这的时候，我很安全。
2.主句发生在从句之前，这类从句由从属连词before, until引导,before意为“在---之前”until 在肯定句中意为“直到---为止”，在否定句中意为“直到---才”。
从句既可置于主句前，也可置于主句之后。
回家之前我必须干完所有的活。
我们将一直等到他回来。
他直到晚上11点才回家。
3.主句发生在从句之后，这类从句由从属连词after引导，意为“在---之后”。
从句既可置于主句前，也可置于主句之后。
放学后我们踢足球吧。
九年级英语时间状语从句练习20题(带答案)
九年级英语时间状语从句练习20题(带答案)1. I was reading a book ____ my mother came back home.A. whenB. whileC. asD. since答案解析：A。
when引导时间状语从句时，既可以表示在某个时刻点发生的动作，也可以表示在某个时间段内发生的动作。
在此句中，“我正在看书”这个动作持续的过程中，“妈妈回家”这个瞬间动作发生了，所以用when。
while引导时间状语从句时，强调主句和从句的动作同时进行，通常用于进行时态，这里“came back”不是进行时态，所以B选项不合适。
as引导时间状语从句时，表示“一边……一边……”或者“随着”，在此语境不符合，C选项错误。
since表示“自从”，引导原因状语从句或者时间状语从句（ 表示从过去某个时间点开始一直持续到现在），与本题语境不符，D选项错误。
2. ____ he was walking in the park, he saw his old friend.A. WhenB. WhileC. AsD. Because答案解析：B。
while强调主句和从句的动作同时进行，在这里“他在公园散步”和“看到老朋友”这两个动作是同时发生的，而且“waswalking”是进行时态，所以用while比较合适。
when虽然也可以表示同时发生的动作，但while更强调动作的同时性。
as表示“一边……一边……”或者“随着”，在此语境不太合适，C选项错误。
Because引导原因状语从句，与本题逻辑不符，D选项错误。
3. She will call me ____ she arrives at the airport.A. as soon asB. whileC. whenD. since答案解析：A。
as soon as表示“一……就……”，强调两个动作几乎同时发生，这里表示她一到达机场就会给我打电话。
初中英语状语从句归纳(附练习及答案)
初中英语状语从句归纳(附练习及答案)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。
一、时间状语从句要点:时间状语从句，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。
1.when当。
的时候mozart started writing music when he was four years old.当)XXX的时分，开始写音乐作品。
2.while当。
时XXX a lot of places while he was traveling.他在旅途中参观了许多地方。
3.as在。
的同时；一边。
一边。
XXX.他一边站起来一边笑着。
4.after在。
之后he left the classroom after he had finished his homework the other day.前几天做完作业之后回的家。
5.before在。
之前XXX.XXX先生来这之前已经在一家银行里工作一年了。
6.XXX。
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。
以来到现在透露表现自曩昔的一个出发点工夫到目前(语言工夫)为止的一段延续工夫。
主句普通用目前完成时，从句用普通曩昔时。
mr green has taught in that school since he came to china three years ago.自XXX先生来中国以来，他就在这所学校教书。
初中状语从句总结及练习(附答案)
状语从句练习易混引导词while, when, as的区别：1.when既可以指"时间点",与瞬间动词连用，也可以指"时间段"，与延续性动词连用（=while）。
如：When he came in, his mother was cooking.When (While) we were at school, we went to the library every day.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 don't 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。
2．Because,as,since 的区别：Because用于表示直接原因,回答why提出的问题，语气最强；As用于说明原因, 着重点在主句，常译成"由于"；since表示显然的或已知的理由或事实，常译成"既然"。
如：Water is very important because we can't live without it.He didn't come yesterday as his mother was ill.I'll do it for you since you are busy.3．such…that, so…that, so that 引导结果状语从句的区别：such是形容词，修饰名词; so 是副词，修饰形容词或副词。
其结构如下：1) such + a (n)+ 形容词+单数可数名词+that……2) such+形容词+复数可数名词+that ……3) such +形容词+不可数名词+that……。
(完整版)初中时间状语从句语法及练习
英语时间状语从句讲解（一）when, while 和as 引导时间状语从句的用法一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas.3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。
因为如果用正在进行时，它表示的就是一段时间而不是一个时间点了。
根据这一点，有的文章补充说：when 从句的动词大多是瞬时动词。
这种说法也可以参照。
实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。
例如：2. When he had finished his homework, he took a short rest.3. Why do you want a new job when you have got such a good one already?二、while 的用法相比于when 来说，while 从句的侧重点就不一样了。
while 从句的侧重点在于描述动作正在发生的状态，它的意思是：当while 事件正在发生的时候，另一件事如何如何。
所以，while 从句一般用的是正在进行时。
而另一件事的状态没有硬性的要求，根据具体情况而定。
例如：1. While my wife was reading the newspaper, I was watching TV.2. While Jim was mending his bike, Lin Tao came to see him.3. While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。
(完整版)初中状语从句总结及练习(附答案)
状语从句练习易混引导词while, when, as 的区别：1.when 既可以指"时间点",与瞬间动词连用，也可以指"时间段"，与延续性动词连用（=while）。
如：When he came in, his mother was cooking.When (While) we were at school, we went to the library every day.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 don't 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。
2．Because,as,since 的区别：Because 用于表示直接原因,回答why 提出的问题，语气最强；As 用于说明原因, 着重点在主句，常译成"由于"；since 表示显然的或已知的理由或事实，常译成"既然"。
如：Water is very important because we can't live without it.He didn't come yesterday as his mother was ill.I'll do it for you since you are busy.3．such…that, so…that, so that引导结果状语从句的区别：such 是形容词，修饰名词; so 是副词，修饰形容词或副词。
其结构如下：1)such + a (n)+ 形容词+单数可数名词+that……2)such+形容词+复数可数名词+that ……3)such +形容词+不可数名词+that……。
(完整版)初中时间状语从句语法及练习(全)
状语从句什么是状：句子中修、形容等的句子成分叫状，用来从地点、、原因、目的、果、条件、步、比、方式和陪同情况等方面修明。
e.g. He speaks English very well（.副作状）e.g. He is playing under the tree（.介短作状）e.g. I come specially to see you（.不定式作状）e.g. If I am not busy tomorrow,I will play football with you.（从句作状）e.g. Having had a quarrel with his wife,he left home in a bad temper（.分作状）状从句：状从句就是在复合句里起状作用的从句，能够表示、地点、原因、目的、果、步、比、方式、条件等。
引状从句的叫做隶属。
状从句的位置能够在句首，也能够在句末。
放在句首，从句后边常用逗号与主句分开；放在句末，从句前面常常不用逗号。
If it ’ s fine tomorrow, I wilgo with you.I will go with you if it’ s fine tomorrow.状从句分：1、状从句2、地点状从句3、原因状从句4、目的状从句5、果状从句6、条件状从句7、步状从句8、比状从句9、方式状从句状从句隶属：when, while, as, before, after, till/until, since, whenever, as soon as（一⋯⋯就）⋯⋯：主将从，主情从，主祈从一、 When/while/as （当⋯候）区：主句作与从句作生的（同/以前 /此后）；从句（延性 /瞬性）1）When:when 引状从句表示“当⋯⋯ 的候”，when既能够指段也可指点，从句中既可用延性又可用瞬性，且作既可和主句的作同生又可在主句的作以前或此后生。
且when 引的状从句中一般用一般在表将来（主将从）。
初中英语状语从句详细讲解与练习(精华版)
对比训练 1
1. __A__ he heard this, he got very angry.
2. I met Lucy__B__ I was walking along the river.
3. __C__ a child, he lived in the countryside. A. when B. while C. as
4. 表示“随着…..”.常指一个行为是另一个行为的结果。 As she grew older, she became more beautiful.
while:持续性动词 ／进行时
1.一般或现在情况
e.g. I like listening to music while I am doing my homework 2.将来. 情况－V一般现在时或现在进行时 e.g.— I’m going to the post office.
won in the end.
A. After B. before C. when D. then
since引导的时间状语从句
1.常译为“自从……”， 2.主句常用现在完成时，从句常用一般过去时。
1.我们自从分手以后一直没见过面。 We haven’t seen each other since we parted. 常用句型：It has been (is) + 时间段 + since从句
-- While you are there, can you get some stamps for me?
3.过去情况
e.g. I hurt my should while I was doing gym.
When: 1.当…的时候 When I was young, I went to town myself. When he receives the letter, he’ll tell us.
九年级英语时间状语从句练习20题含答案解析
九年级英语时间状语从句练习20题含答案解析1.I was doing my homework ______ my mother was cooking.A.whenB.whileC.asD.before答案解析：B。
while 强调两个动作同时进行，“我在做作业的时候妈妈在做饭”，两个动作同时发生，用while。
when 通常表示一个动作发生时另一个动作突然发生；as 强调伴随，动作同时发生但不如while 强调的程度深；before 表示在……之前。
2.______ I was walking in the park, I saw a beautiful bird.A.WhenB.WhileC.AsD.After答案解析：A。
when 表示一个动作发生时另一个动作突然发生，“我在公园散步的时候突然看到一只漂亮的鸟”。
while 和as 强调两个动作同时进行，after 表示在……之后，不符合语境。
3.She was reading a book ______ he came in.A.whenB.whileC.asD.before答案解析：A。
when 在这里表示一个动作发生时另一个动作突然发生，“他进来的时候她正在读书”。
while 和as 强调两个动作同时进行，before 表示在……之前。
4.______ he finished his work, he went home.A.WhenB.WhileC.AsD.After答案解析：D。
after 表示在……之后，“他完成工作之后回家了”。
when、while 和as 都不能准确表达这个先后顺序。
5.I will call you ______ I arrive.A.whenB.whileC.asD.before答案解析：A。
when 表示“当……的时候”，“我到达的时候会给你打电话”。
while 和as 强调同时进行，before 表示在……之前，不符合语境。
初中时间状语从句语法及练习
英语时间状语从句讲解与练习(一)when, while 与as 引导时间状语从句得用法一、when 得用法如果只从现象来瞧,when 从句用得最多得就是一般过去时,而主句得时态没有限制,根据具体情况而定。
1、When he was a child he was always trying out new ideas、她小时候就常常试验一些新得设想。
2、When she came into my room, I was just reading a book、她走进我房间时,我正在瞧书。
3、Were you writing when the teacher came in? 老师进来得时候,您在写信吗？4、Sorry, I was out when you called me、对不起,您打电话来得时候我出去了。
5、He was on the point of leaving when someone knocked at the door、她正要走,这时有人敲门。
6、I thought of it just when you opened your mouth、就在您要说话得时候,我也想到了。
7、I had hardly[scarcely] closed my eyes when someone knocked at the door、我刚一闭上眼,就有人在敲门了。
根据以上得例句,我们可以总结出一点:when 从句得A事件,相当于另一个事件B发生得时间点。
也就就是说,when 从句得重点不在动作本身发生得状态,而只就是把它作为一个时间点,所以when 多数情况下用得就是一般过去时,则不用正在进行时。
因为如果用正在进行时,它表示得就就是一段时间而不就是一个时间点了。
根据这一点,有得文章补充说:when 从句得动词大多就是瞬时动词。
这种说法也可以参照。
实际上,when 从句也可以有其它得时态,但几乎也不用进行时,因为它也只就是作为一个时间参照点。
初中英语语法：时间状语从句解析和练习题(含答案)
2021年初中英语语法：时间状语从句解析和练习题(含答案)在句子中起时间状语作用的句子称为时间状语从句。
时间状语从句可以放在句首、句中和句尾。
引导时间状语从句的词有when、while、as、before、after、since、until/till、as soon as、once、each time、next time、the moment、immediately、instantly等。
（一）when引导的时间状语从句1）when意为“当......时”，引导时间状语从句，表示主句的动作和从句的动作同时或先后发生例句：Faith is the bird that feels the light when the dawn is still dark. 信念是黎明前的黑夜里能感受到光明的鸟儿。
例句：When I was wandering in the street, I met her. 我在街上徘徊的时候遇到了她。
2）when引导的时间状语从句中的动词可以用延续性的=动词，也可以用终止性动词例句：He was listening to the music when I went in. 当我进去的时候，他正在听音乐。
例句：I will visit my parents when I have time. 我有空时会去看望我的父母。
（二）while引导的时间状语从句While引导的时间状语从句，常译为“与......同时，在......期间”，while引导的从句常用延续性动词或表示状态的动词。
例句：They rushed in while we were discussing problems. 当我们正在讨论问题时，他们冲了进来。
例句：Make hay while the sun is shining. （谚）趁热打铁。
（三）as引导的时间状语从句As引导的时间状语从句，可以表达“正当，一边一边，随着”等意思。
时间状语从句+习题练习(含答案)
专题: 时间状语从句在下列空格中填入适当连词。
1._________he comes tomorrow,I will ask where he has been.2._________he was speaking,everybody listened carefully.3.I saw her just now_________she was getting off the train.4.Have a good look at that man________you pass him.5.It was already eight o'clock_________we got there.6.I was about to go out_________a visitor came.7.We'll go to the country at the beginning of June,_________the summer harvest will start.8.He learned to speak German_________he was in Berlin.9.Henry is in charge of the office________Mr.Smith is away.10.I listen to the recorder_________I have time.11.He had learned Chinese_________he came to China.12._________the work was done,we sat down to sum up experience.13.I haven't seen him_________he moved to the other side of the town.14.I waited________ he came back.15.I didn’t recognize him________he took off his eyeglasses.16.She likes everything to be in place________she starts to work.17.The thieves ran away_________they caught sight of the police.18.They decided to go back home_________their money ran out.19.__________I get to the airport,I will phone you to pick me up.20.They were about to leave______it began to rain.Keys:1.When2.While/When3.as4.when/as5.when6.when7.when8.while9.whi le10.whenever11.before12.After13.since14.till/until15.until16.before17.as soon as18.before19.As soon as20.when。
初中英语状语从句讲解、练习与答案
状语从句状语从句用来修饰主句中的动词，副词和形容词的从句叫状语从句。
根据其含义状语从句可分为时间状语从句，地点状语从句，条件状语从句，原因状语从句，结果状语从句，比较状语从句，目的状语从句，让步状语从句。
1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。
例如：It was raining hard（rain hard 下大雨）when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along（沿着走）the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里，通常不用将来时态，用现在时态表示将来的动作或状态。
例如：I’ll ring you up as soon as I get to New York.I will tell him everything when he comes back.He won’t believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里，如果主句用肯定式，其含义是“一直到……时”，谓语动词只能用延续性动词。
如果主句用否定式，其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。
例如：The young man read till the light went out（熄灭）.Let’s wait until the rain stops.We won’t start until Bob comes.Don’t get off（从下来）until the bus stops.【Till是指直到某一特定事件发生的时候，而在那个时刻之后，该事情或状况仍将持续。
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状语从句什么是状语：句子中修饰动词、形容词等的句子成分叫状语，用来从地点、时间、原因、目的、结果、条件、让步、比较、方式和伴随状况等方面修饰说明谓语。
e.g. He speaks English very well.（副词作状语）e.g. He is playing under the tree.（介词短语作状语）e.g. I come specially to see you.（不定式作状语）e.g. If I am not busy tomorrow,I will play football with you.（从句作状语）e.g. Having had a quarrel with his wife,he left home in a bad temper.（分词作状语）状语从句：状语从句就是在复合句里起状语作用的从句，可以表示时间、地点、原因、目的、结果、让步、比较、方式、条件等。
引导状语从句的连词叫做从属连词。
状语从句的位置可以在句首，也可以在句末。
放在句首时，从句后面常用逗号与主句隔开；放在句末时，从句前面往往不用逗号。
If it’s fine tomorrow, I wil l go with you.I will go with you if it’s fine tomorrow.状语从句分类：1、时间状语从句2、地点状语从句3、原因状语从句4、目的状语从句5、结果状语从句6、条件状语从句7、让步状语从句8、比较状语从句9、方式状语从句时间状语从句从属连词：when, while, as, before, after, till/until, since, whenever, as soon as（一……就）……时态：主将从现，主情从现，主祈从现一、When/while/as（当…时候）区别：主句动作与从句动作发生的时间（同时/之前/之后）；从句动词（延续性/瞬时性）1）When:when引导时间状语从句时表示“当……的时候”，when既可以指时间段也可指时间点，从句中既可用延续性动词又可用瞬间性动词，且动作既可和主句的动作同时发生又可在主句的动作之前或之后发生。
且when引导的时间状语从句中一般用一般现在时表将来（主将从现）。
e.g. I will call you when I get there.e.g. When I came home my wife was cooking dinner.e.g. I will go home when the rain stops.e.g. When I got to the airport，the guests had left.A）如果when引导的时间状语从句的主语与主句主语相同，而从句的谓语又是be动词时，那么从句中的主语和be可以省略;e.g. When (you are) in trouble, ask her for help.B）当when引导的时间状语从句的主语与主句主语相同时，往往还可以省略从句的主语并用“when+分词”的形式替代该状语从句。
e.g. When I came into the room (=When coming into the room), I found him lying there asleep.2）Whilewhile引导时间状语从句时表示“当……的时候”，它强调主句的动作与从句的动作同时持续地进行，用于这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词，或者强调主句的动作发生在从句动作的进行过程中，此时主句中的谓语动词通常是非延续性动词。
记住，从句中始终是延续性动词，且从句多用进行时态。
（while 还可以表示对比，译成“然而”，放在句首可以表示“虽然”）e.g. I met her while I was at school.e.g. While I was sleeping, the UFO arrived.e.g. We were doing our homework while it was raining outside.e.g. Study while you study; play while you play.3）Asas引导时间状语从句时表示①“当……时”（只引导瞬间性动词，两个动作是紧密联系的，一前一后进行），②“一边……一边……”，侧重表示两个动作同时发生(包括一个主语同时进行两个动作)，③“随着”，一种动作随着另一种动作的变化而变化从句中只能接延续动词。
e.g. He jumps as he goes along.e.g. As the wind rose the noise increased.【When, while , as 辨析】三者均可以表示“当……时候”，如果主句表示的是短暂性动作，而从句表示的是延续性动作（主短从延），三者可以通用。
I met Mr Li as / when / while I was walking along the street.（1）While意为“在……期间”，从句的谓语必须是延续性动词。
The plane had left when we got to the airport.（2）表示带有规律性的“每当”，或者主从句动作有先后时，都只能用when.When winter comes, it becomes cold.（3）表示“随着”时间的推移，主从句的内容是两种变化的情况，只能用as.As the day went on, the weather got worse.（4）强调主句动作延续到从句所指的整个时间，只能用while.【巩固练习】1）I had just stepped out of the bathroom and was busily drying myself with a towel ____ I heard the steps.A. whileB. whenC. sinceD. after2）He was about halfway through his meal ____ a familiar voice came to his ears.A. whyB. whereC. whenD. while3）We were swimming in the lake ____ suddenly the storm started.A. whenB. whileC. untilD. before4）—I’m going to the post office.—____ you’re there, can you get me some stamps?A. AsB. WhileC. BecauseD. If5）I ____ along the street looking for a place to park when the accident ____.A. went; was occurringB. went; occurredC. was going; occurredD. was going; had occurred答案BCABC二、Before/afterbefore引导时间状语从句时表示主句的动作发生在从句动作之前,常翻译为在“……之前”，“……才……”或“……就……”。
e.g. See me before you leave.e.g. Before they drive any of the buses, they will have to pass a special test.after引导时间状语从句时表示主句的动作发生在从句动作之后e.g. I saw them after I arrived.e.g. I found his pen after he has left.【巩固练习】He was told that it would be at least three more months ____ he could recover and return to work.A. whenB. beforeC. sinceD. thatIt was some time ____ we realized the truth.A.whenB. untilC. sinceD. before三、Till/until/not……until1、肯定句：till和until这两个词作连词和介词时的意义和用法相同，一般可以换用(放在句首时通常用until的形式，till在口语中更为常见)。
主句的谓语动词必须是持续性的，表示“到……为止”，“直到……才(开始)”。
e.g. Walk till you come to a white house.e.g. We didn’t discuss the problem until he came back.2、否定句：Not ……until，主句的谓语动词则为短暂性的，表示“直到……才”，若主句谓语动词为延续性动词，根据上下文可表示“没有到……”He didn’t wait until/ till I returned.他没有等到我回来。
not until的三种用法：1）用在句中的基本用法e.g. He did not appear until the concert ended.2）与that搭配的强调结构e.g. It was not until the concert ended that he appeared.3）用于句首的倒装结构主句倒装e.g. Not until the concert ended did he appeared.【巩固练习】1）It is difficult for us to learn a lesson in life ____ we’ve actually had that lesson.A. untilB. afterC. sinceD. when2）A good storyteller must be able to hold his listeners’ curiosity ____ he reaches the end of the story.A. whenB. unlessC. afterD. until3）I don’t really work here; I ____ until the new secretary arrives.A. just help outB. have just helped outC. am just helping outD. will just help out四、SinceSince引导的时间状语从句表示“自从……以来”，需注意以下两1）引导时间状语从句时，一般指的是“从过去的某一时间点以来”的概念，表示动作从过去一直持续到现在。