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状语从句的省略一：状语从句中的省略省略句的规则1.当从句的主语和主句的主语一致(或者从句的主语为it)．2.从句谓语中包含be动词．如：be doing，be done, be to do, be +adj在此种情况下可以省去从句的主语和be动词．保留be之后的部分,被保留部分常为现在分词、过去分词、不定式、形容词等。
1。
Don’t speak until(you are）spoken to .2。
I’ll buy a TV set if (it is )necessary。
3。
While( I was )walking walking alone in the street, I heard my name called.4。
Tom raised his hand as if (he was ) to say something.二：常见的几种状语从句的省略1.when,while，as，until引导的时间状语从句的省略while(they are）visiting the city．they reeeived a warm welcomwhen（he was)asked why he was late，he kept silent．●注意After finishing his homework，he went home happily.Before being repaired, the TV set needs a careful examination。
2.if，unless,once引导的条件状语从句的省略Onee（it is)begun．it must be done well．Unless（you are invited）to speak，you should remain silent at the conference。
Correct mistakes, ifany。
3.though，although,even if,even though引导的让步状语从句的省略Though lacking money，his parents managed to send him to university。
在英语的实际应用中，有时上下文或当时的语境能够帮助我们理解所写的内容，所以有的时候可以省去一个或更多的句子成分，但前提是不影响句子的理解和可读性，因此若有具体的上下文支撑，是可以省去部分成分。
跟定语从句的“瘦身”原理类似，状语从句也可以“瘦身”，这种“瘦身”原理就是省略。
若从句的主语与主句的主语一样，那么通常可以省略从句的主语或助词，然后动词做相应的变化，例如：While Sarah was studying, she fell asleep.萨拉在学习时睡着了。
解析：此句可以省略，因为从句中的主语和主句中的主语都是 Sarah，因此可以省略为 While studying, she fell asleep，但是以下这句不能省略，例如：While Sarah was talking, I fell asleep.萨拉说话的时候，我睡着了。
解析：从句中的主语 Sarah 和主句的主语 I 不一样，所以不能省略。
一、状语从句带 be 动词的省略在带 be 动词（am, is, are, was, were, been, being）的状语从句中，直接省略主语和 be 动词，例如：1. 萨拉在学习时睡着了。
While she was studying, Sarah fell asleep.省略：While studying, Sarah fell asleep.2. 尽管他迟到了，他还是被允许去看电影。
Although he was late, he was admitted to the movie.省略：Although late, he was admitted to the movie.二、状语从句不带 be 动词的省略在不带 be 动词（am, is, are, was, were, been, being）的状语从句中，直接省略主语，然后把对应的动词变成 -ing 形式，例如：1. 杰克读完这本书后，把它放回书架上。
状语从句xx省略状语从句得省略原则主要就是：如果从句中得主语与主句中得主语一致，就可以经过一定得变动把状语从句中得主语与谓语得一部分或全部省略，从而使语言更加简洁、明了。
现就把各种状语从句得省略现象列举如下：一、时间状语从句xx省略When (she was) very young, she began to learn to play the piano、她很小时，就开始学习弹钢琴。
While (I was) at college, I began to know him, a strange but able student、我在上大学时就开始认识她，一个奇怪但有能力得学生。
When arriving, send me a telegram、(When you arrive, send me a telegram、)到达之后，来个电报。
Before leaving, turn off all the lights、(Before you leave, turn off all the lights、)走之前，请关闭所有得灯。
Don’t come in until (you are) asked to、不叫您请您不要进来。
Whenever (it is )possible, you should come and help、不管什么时候只要有可能就来帮忙。
You should let us know the result as soon as(it is) possible、您应尽快让我们知道结果。
注：as在引导时间状语从句时，没有这种省略现象。
我们不可说As walking, she found a nice shining thing on the ground、二、地点状语从句xx省略地点状语从句得省略常用下列结构：where(ver) possible, where(ver) necessary,Lay these books where possible you can find them easily、把这些书放在您可能容易找到得地方。
状语从句中得省略状语从句得省略原则主要就是：如果从句中得主语与主句中得主语一致，就可以经过一定得变动把状语从句中得主语与谓语得一部分或全部省略，从而使语言更加简洁、明了。
现就把各种状语从句得省略现象列举如下：一、时间状语从句中得省略When (she was) very young, she began to learn to play the piano、她很小时，就开始学习弹钢琴。
While (I was) at college, I began to know him, a strange but able student、我在上大学时就开始认识她，一个奇怪但有能力得学生。
When arriving, send me a telegram、(When you arrive, send me a telegram、) 到达之后，来个电报。
Before leaving, turn off all the lights、(Before you leave, turn off all the lights、) 走之前，请关闭所有得灯。
Don’t come in until (you are) asked to、不叫您请您不要进来。
Whenever (it is )possible, you should come and help、不管什么时候只要有可能就来帮忙。
You should let us know the result as soon as(it is) possible、您应尽快让我们知道结果。
注：as在引导时间状语从句时，没有这种省略现象。
我们不可说As walking, she found a nice shining thing on the ground、二、地点状语从句中得省略地点状语从句得省略常用下列结构：where(ver) possible, where(ver) necessary,Lay these books where possible you can find them easily、把这些书放在您可能容易找到得地方。
【导语】⽤作状语的从句叫状语从句。
状语从句可置于句⾸、句末或句中，⼀般来说，状语从句都⽐较完整。
但是，在⼀些状语从句中存在的省略问题，可以归纳为⼏点。
以下内容由整理发布，欢迎阅读参考！更多相关讯息请关注！1. 在when,whenever,while,until,as soon as等引导的时间状语从句中,可以省略与主句中主语相同的主语和系动词或助动词。
When (he was) a child he ran wild. 他⼩的时候很不守规矩。
They were scolded whenever (they were) late for school.每次上学迟到,他们都要挨骂。
While (he was) in prison,he wrote his first novel.他在狱中写出了第⼀部⼩说。
As soon as (I am) on board I always feel sick. 我⼀上船就感到恶⼼。
2. 在if,unless,once等引导的条件状语从句中。
If (it is) not well organized,the meeting will be a failure.如果组织不好,会议就会失败。
Substances have no tendency to expand unless(they are) heated.除⾮受热,物质不会有膨胀的倾向。
Once (she was) inside her bedroom,she began to cry. ⼀⾛进卧室,她就开始哭。
3. 在where,wherever引导的地点状语从句中,可以省略主语和系动词或助动词。
Through long power lines,electricity goes where (it is) needed.电通过输电线输送到需要它的地⽅去。
4. 在than,as引导的⽐较状语从句中。
Ｓhe works better than Ｉ (works). 她⼯作做得⽐我好。
1．Don’t ______ in the exam while _______ an exam.A．calm；take B．cheat；takingC．list；taking D．ignore；take【答案】B【解析】考查动词辨析和状语从句的省略句。
句意：考试的时候，不要作弊。
A. calm使平静；B. cheat作弊；C. list列清单；D. ignore忽略。
分析句子可知，本句为状语从句的省略句，原句应该是while you are taking an exam，省略了you are，当从句的主语和主句的主语一致, 从句谓语中包含be动词, 在此种情况下可以省去从句的主语和be动词．保留be之后的部分，被保留部分常为现在分词、过去分词、不定式、形容词等，由“Don’t， in the exam”可知，考试不要作弊，祈使句用动词原形。
故选B。
2．If _____more time, we can do it better.A．give B．giving C．given D．gave【答案】C【解析】考查if条件状语从句的省略。
句意：如果被给予更多时间，我们能做得更好。
原句是if we are given more time，当从句的主语和主句的主语一致，从句谓语中包含be动词, 在此种情况下可以省去从句的主语和be动词，保留be 之后的部分，被保留部分常为现在分词、过去分词、不定式、形容词等,故选C。
3．When _____ from the top of the hill, the whole city looks more beautiful.A．seeing B．seen C．is seen D．is seeing 【答案】B【解析】考查状语从句的省略句。
句意：从山顶上看，整个城市看起来更美。
分析句子可知，本句为状语从句的省略句，还原后为：When the whole city is seen from the top of the hill,因从句的主语与主句的主语相同，且从句的动词为be动词，所以主语和谓语可以省略。
中考英语语法：状语从句的省略问题本文导航1、首页2、状语从句专项练习23、状语从句专项练习答案状语从句的省略问题一文为考生朋友们提供了时间状语从句、条件状语从句、方式状语从句等。
详细状语从句的省略问题如下：状语从句的省略问题为了简洁起见，有的状语从句(如时间状语从句、条件状语从句、方式状语从句等)有时可省略从句的主语和部分谓语(尤其是当从句主语与主句主语一致，且从句谓语包括有动词be时)：She fell asleep while (he was) doing his homework. 他在做作业时睡着了。
While (he was) doing so, he trembled a little. 他这样做时稍稍颤抖了一下。
He opened his mouth as if (he was) to speak. 他张开口，好像要说话似的。
Often she would weep when (she was) alone. 她一个人时，常常哭泣。
I’d like to see you whenever (it’s) convenient. 在你方便的时候我想来看看你。
If (you are) traveling north，you must change at Leeds. 如果你是向北行，你必须在里兹换车。
【注】有些由if构成的省略结构，已属固定短语，如if any,if necessary, if possible, if not, if so：There are few, if any, mistakes in that book. 那本书就是有错误也不多。
If necessary, ring me at home. 如果必要，可以打电话到我家找我。
If possible, I wish to go there next summer. 如果可能，我希望明年夏天去。
He may be busy. If so, I’ll call later. If not, can I see him now?他可能很忙，要是这样，我以后再来拜访。
关于状语从句的省略问题
在英语学习中我们常见到状语从句省略问题,但并不是所有的状语从句都可采取省略式，可采用省略式的有：
1.when ,while, till, until, once 所引导的时间状语从句。
2.if, unless 所引导的条件状语从句。
3.although, though, even if , even though所引导的让步状语从句。
4.as if, as though所引导的方式状语从句。
5.than 所引导的比较状语从句。
状语从句使用省略的四种情况:
一：当从句的主语和主句的主语一致（从句的谓语常含有系动词be）时，常把从句的主语和系动词一起省略，省略后从句呈现出：Conj+doing /done/adj/adv/to do/n/介短
Eg：
1.You must be careful when (you are )crossing the street.
2.When (he was) asked why he was late, he said he had missed the
train.
3.When /while (he was ) in Paris, he picked up some French.
4.Once ( it is ) seen, it will never be forgotten.
5.Unless ( I am ) invited, I won’t attend his wedding.
6.Though (he was )young/a boy, Tom knows a lot.
7.Even if/though (he is )invited, he won’t go.
8.He must be somewhere around if (he is )not here/in the office.
9.They looked around the room as if /though (they were)looking for
something.
10.H e opened his mouth as if /though (he was) to say something.
11.H e is much taller than (he is) expected.
12.I can’t do it until (I am) told how to.
13.W hen/while (he was) still a boy, he began to support himself.
14.I f (water is )heated to a higher temperature, water will be turned
into steam.
15.T he research is so designed that once_____, nothing can be done
to change it.
A begins
B having began
C beginning
D begun
(D)
16. The 18—storied building ,when ______, will shut out the sun lighting up the rooms in my house.
A completed B. to be completed C. completing D. have completed (A)
17. The flowers will die unless ______every day .
A watered
B watering
C water
D to water (A)
二：当从句的主语和主句的逻辑主语一致时，也可把从句省略为Conj+doing /done/adj/adv/to do/n/介短，此种用法主要是用来描述或
说明某种现象或情况，是“对事不对人”，而第一种情况是就具体的人或事来说明的。
1.While (you are) hiking or rafting, it is important (for you )to think
about safety.
2.There is something important (for you )to remember when (you
are)attending his lecture.
3.To become a top gymnast ,it is important (for you )to start training
when (you are) very young.
4.There are a few simple safety measures (for you ) to follow while (you
are)training.
三：当从句是it is/was+表语时或there be 句型时，常省略it is/was 或there be
1.He made some marks in the article where (it was) necessary .
2.Let’s practise speaking English when and where (it is) possible.
3.I will go to see him for myself if (it is )possible/necessary.
4.Correct the mistakes, if ( there are )any（mistakes）, in the article . 四：当从句的主语和主句的宾语一致时，间或也有这样的省略。
His father told him to be careful when (he was )crossing the street.。
