关于状语从句的省略问题
状语从句的省略
Every evening after dinner,if not ---from work,I will spend some time walking my dog. A.being tired B.tiring C. tired D.to be tired -Who should be responsible for the accident? -The boss,not the workers.They just carried out the order---A.as told B.as are told C.as telling D.as they told
C
A
Once seen,it can never be forgotten.一旦看见，永远也不 会忘记。
状语从句的省略问题
2.若状语从句中的主语是it， 动词是系动词be，则通常 可省去主语it及系动词be, 留下其余部分。
I’ll buy a computer if (it is) necessary.如有必要，我就买一 台电视机。 No matter how difficult (it may be),we are determined to carry the research to the end.不管有多困难，我们决心把 研究进行到底。
Exercises
D 1.Don’t leave until____ to do so. A.be ordered B.ordering C.order D.ordered 2.A beam of light will not bend round c unless ___to do so with the help of a reflecting device. A.having been made B.being made C.made D.you made
状语从句的省略(精讲精练)
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。
英语中状语从句的省略规则
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。
状语从句的省略
一般来说，省略现as, before, after, till, until, once等引导 的时间状语从句；由if,unless等引导 的条件状语从句；由though, although,even if, whatever等引导 的让步状语从句；由as,than 引导的 比较状语从句；由as, as if, as though引导的方式状语从句。
1.当状语从句的主语和主句的主语一致时，可以省 略从句中的主语和系动词be,这时从句从句中可 以出现以下结构：
连词+名词 连词+形容词 连词+介词短语 连词+现在分词 连词+过去分词 连词+不定式
• 请看下面的句子： 1. Though( he is) a young boy, he has a good command of computer. 2. Though (he is) tired, he is still working hard. 3. He looked everywhere as if (he was) in search of something. 4. He opened his mouth as if (he were) to speak. 5. While (my father was) watching TV, my father fell asleep. 6. The maths problem is more difficult than (it was) expected.
2. 当从句中的主语是it, 谓语动词中又含有系
动词be, 可以把it 和系动词be一起省略。 此时构成“连词（if, unless, when, whenever) +adj.”的结构 例如：
状语从句中的省略
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。
状语从句中的省略
（3）连词（once, as if, while等）+介词短语 He looked everywhere as if (he was) in search of something. 他四处张望，好像在找什么东西。 （4）连词（when, while, though等）+现在分词 While (I was) walking along the street, I heard my name called. 走在街上的时候，我听见有人叫我的名字。
2. He may not be at home then. If so (= If he is not at home), leave him a note.
那时他可能不在家。如果他不在家的话，给他留 个便条。
Hale Waihona Puke 巩固练习1. The research is so designed that once _____, nothing can be done to change it. A. begins B. having begun C. beginning D. begun 2. Though ________ money, his parents managed to send him to university. A. lacked B. lacking of C. lacking D. lacked in
2、当从句中的主语是it，谓语动词中又含有be动
词时，可以把it和be动词一起省略。此时构成 “连词（if, unless, when, whenever等）+形容
词”。 Unless (it is) necessary, you’d better not refer to the dictionary. 如果没有必要，你最好不要查字典。
状语从句中的省略
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。
英语语法：状语从句中的省略问题
【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。
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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.。