飞天大圣朱七
基础英语语法：状语从句
在年少学习的日子里，大家都背过不少知识点，肯定对知识点非常熟悉吧！知识点就是掌握某个问题/知识的学习要点。那么，都有哪些知识点呢？下面是我为大家收集的基础英语语法：状语从句，欢迎大家借鉴与参考，希望对大家有所帮助。
时间状语从句
1、when的用法
(1)when既可引导一个持续性动作，也可引导一个短暂性动作，可用于表示主句和从句动作同时发生或从句动作先于主句动作，有时还可表示从句动作后于主句，意为“当……时候”。
(2)when在be about to do……when……，be doing……when……，had done……when……，be on one’s way……when……，be on the point of doing……when……等结构中，作“那时突然”讲。
(3)when “既然、鉴于;尽管，虽然(位于主句之后);如果”
2、while的用法
(1)表示“当……时候”，引导的动作必须是延续性的。
(2)用作并列连词，表示相对关系“然而”。
(3)引导让步状语从句，相当于although,意为“虽然”，位于主句前。
(4)引导条件状语从句，相当于as/so long as，意为“只要”。
3、as 的用法
(1)表示“当……时候”，强调同时发生，不指先后。
(2)说明两种正在发展或变化的情况，表示“随着”，表示时间的推移。
(3)表示“一边……一边……”。
(4)强调两个动作紧接着发生。
(5)表示“虽然，尽管”。
(6)其他含义“正如，正像”，“作为”，“由于，因为”。
4、before的用法
(1)一般意为“在……之前”“……才”，“……就”“还没有……”“免得”“不知不觉”“宁可，宁愿”，“否则，要不然”。
(2)It + will be/was + 时间段+before+一般现在时/一般过去时。在肯定句中，意为“多长时间之后才”;在否定句中，意为“用不了多长时间就”。
5、until和till
(1)与肯定句连用，必须是延续性动词。
(2)与否定句连用，必须是非延续性动词，表示“直到……才，在……之前不……”。
注意：not until可用于强调句和倒装句
强调句：It is/was not until…that…倒装句：not until 放句首时，主句要部分倒装。
6、since的用法
(1)since后是非延续性动词，时间起点从该动作发生算起，意为“做某事多久了”;since后是延续性动词，时间起点从该动作结束算起，意为“不做某事已有多长时间”。
(2)It is/has been +时间段+since+一般过去时
7、表示“一......就......”的句型
(1)as soon as, once,immediately,directly,instantly,the moment,the minute等引导的从句都表示从句的动作一发生，主句的动作随即发生，常译作“一……就……”，这类从句中，经常用一般现在时态代替将来时态。
(2)on doing sth.或“on one’s+名词”作时间状语。
8、有些名词和副词可以起连接词的作用，引导时间状语从句。
注意：时间状语从句中不用将来时态。若要表示将来时间，可用一般现在时态表示。但when引导名词性从句时，从句中要使用将来时。
地点状语从句
1、地点状语从句由where,wherever引导。
注意：where与where的`区别：Where表特定的地点，而wherever表示非特定的地点。
Wherever=to/at any place where
2、地点状语从句与定语从句的区别
Where引导定语从句时，从句前应有一个表示地点的名词作先行词;而状语从句前则无先行词。
原因状语从句
引导词：because, since,as, now that, not that…, but that…, seeing that, considering that, in that
注意：for也可以表示原因，属并列连词，但不是说明直接原因，而是对某种情况加以推断，用于表示补充说明理由。
目的状语从句
引导词：so, so that, in order that, that, to the end that(以便，为了)，in case,for fear that,lest(以免，以防)，
目的状语从句中通常有情态动词can,could,may,might,should,would等。
注意：1、in case 还可表示“万一，假如”。
2、目的状语从句可以用so as to, in order to 等不定式代替，但主句和从句的主语必须一致。
结果状语从句
引导词：so...that(如此……以至于……)，such...that(如此……以至于……)，so that(结果是)，with the result that(所以，结果是)
注意： (1)so...that与such...that的区别
So+形容词such+a/an+形容词+单数名词
So+形容词+a/an+单数名词such+形容词+复数名词
So+副词such+形容词+不可数名词
So many/few+复数名词
So much/little+不可数名词
(2)so that引导的目的状语从句与so that 引导的结果状语从句
目的状语从句一般使用情态动词，结果状语从句一般不使用情态动词;
结果状语从句常常用逗号与主句分开。
(3)so...that与so...as;such...that与such...as
So...that/such...that为结果状语从句;so...as/such...as为定语从句。
条件状语从句
引导词：if(如果)，unless(除非)，if only(只要，但愿)，only if(只有)，in case(万一)，suppose/supposing(that)
(假设)，provided/providing(that)(只要，假若)，on condition that(要是，在……条件下)，so/as long as(只要)，(let's/let us)say(假设)
方式状语从句
引导词：as(像……一样，正如……)，as if/as though(好像，宛如)
注意：1、固定句型A is to B what C is to D.意为“A对B而言正如C对D一样”。
2、as if, as though引导的从句若与事实相反，用虚拟语气;若与事实相符，不用虚拟语气。
让步状语从句
引导词：though/although/as(虽然，尽管)，even if/though(即使，尽管)，whether/no matter whether...or(not)
(不管……是否，不管是……还是)wh-ever/no matter wh-(无论……)
注意：(1)though,although,as的区别
A、Though,although的主句中可以用yet, still, nevertheless,但不可使用but。
B、though引导的从句可以倒装，也可以不倒装;as引导的从句必须倒装;although引导的从句不能倒装。
其结构为：形容词/分词/副词/动词原形/名词(无冠词)+as/though+主语+谓语……
(2)though可用作副词，放在句末，意为“不过，但是”。Although无此用法。
(3)某些短语也引导让步的从句或短语，意为“尽管”，如：in spite of the fact that, despite the fact that, regardless of(the fact that)
比较状语从句
引导词：as...as(和……一样)，not as/so...as(和……不一样)，than(比)，the more...the more...(越……越……)
状语从句中的省略问题
1、在状语从句中如果主语与主句的主语一致，同时从句中又含有系动词be，则通常可省去从句的主语和系动词be,留下其余部分。
2、若状语从句中主语是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。
实用语法总结之状语从句
状语从句有时间、地点、原因、目的、方式、结果、条件、让步等八种。
一、时间状语从句
引导词有after,before,as,once,since,till,until,when,whenever,while,as soon as,the moment/minute…（一…就）,the time,the day,every time,next time,each time,by the time of,no sooner…than（一…就）,hardly…when（一…就）。例如：
Each/Every time he comes here,he will drop in on me.
每次他来这儿他都顺便看我。
He was ill last time I saw him.上次我见到他时他病了。
No sooner had she heard the news than she cried.她一听到这个消息就哭了.
【辨析】when与while
when引导的从句动词可以是延续性的或短暂性的，while引导的从句中动词必须是延续性的；在"be…when…”句式中when表"at that time（就在这时）"意，这样用的when不能换为while;while有时并不表示时间，而表示对比，意“而”、“却”，when无这样的用法。例如：When I got home I found the door locked./While（或When）we were working in the fields,it suddenly began to rain./He was wandering through the streets when a bike hit him./His pencil is red,while mine is yellow.
【辨析】till与until
一般情况下可以互换，但until可以位于句首，till则不能。例如：
Until it stops raining，the children can?t go out.雨停了，孩子们才能出去.
=Not until the rain stops can the children go out.
二、地点状语从句
引导词有where，wherever.例如：
I?ll go wherever the people want me to go.(wherever=to any place where)
He works where his grandfather fought.(where=in the place where)
Where there is a will,there is a way.(Where=In the place where)
三、原因状语从句
引导词有because,since,as,now(that)（既然）
回答以why提出的问题时，只能用because,而不能用as等。
since=now(that),表“既然”意，表示已知的或明显的原因，由此加以推论。例如：
Now that/Since you are free today,you may have a rest at home or go out for a walk.
for 是一个并列连词，用来连接两个并列句，引导的句子是对前面一句话的内容的推测或补充说明。例如：It must have rained last night,for the ground is wet./The day has broken,for the birds are singing.（这两句中的for都不可换为because或as,since等。）
四、目的状语
引导词有so that,in order that,that ,incase（免得，以防）。目的状语从句谓语常含有can/could/may/might/will/would等情态动词。例如：
He ran as fast as possible in order that he could catch the bus./Please remind me of it again tomorrow in case I forget.请明天再提醒我一下，以免我忘记。
五、方式（或比较）状语从句
引导词有as,as if,as though,than,as/so…as,the more…the more.例如：
Tom is not so/as tall as John./It looks as if it is going to rain./He runs faster than I.
注：as…as既可用于肯定句，又可用于否定句，so…as只能用于否定句。
六、结果状语从句
引导词有so…that,such…that,so that.例如：
1. He works so hard that he makes great progress in his studies.
2. It?s such a difficult problem that nobody can work it out.
3. There?s not any noise here so that I feel very comfortable.
第3个例句中so that从句不是目的状语从句，从结构上看没有can,may等情态动词，从意思上看I feel very comfortalbe是There is not any noise的结果.
七、条件状语从句
引导词有if,unless,as/so long as,on condition that,in case（如果）等，从句的时态用一般现在时（含现在完成时），一般过去时（含过去完成时）分别代替一般将来时和过去将来时。例如：
If it rains tomorrow,I won?t go there./He said he would not go back home unless he had achieved a lot./I?ll study so long as. I?m alive./In case he come,let me know.如果他来的话，告诉我一声。
If 引导的条件句可以是真实性条件句，也可以是非真实性条件句、（用于虚拟语气）
八、让步状语从句
引导词有though,although,even if,even though,as,whoever,whatever,
however,no matter+what/who/when/…等。例如：
Though/Although he is ill,he still goes to school./She started her experiment,even though she had little money./Whatever you found,you must turn it in./However hard he worked,he hardly made any progress.
as 作“尽管”意时，一般将其句中的表语放在句首，例如：Young as he is,he knows a lot.=Although he is young,he knows a lot.若表语为名词，冠词要省略，例如：
Child as/though he is,he has remembered a lot of English words.（此句中though不可换为although）
although或though不能与but同时出现在一个复合句中，但是"Although/Though…，(and)yet…”句式却是正确的。例如：
Although it is raining heavily,yet they are repairing the bridge.
CC陈四斤
英语语法状语从句
状语从句在复合句中作状语，修饰动词、形容词或副词等。状语从句可以表示时间、条件、原因、地点、目的、结果、让步、方式、比较等意义。
知识梳理：提纲挈领，抓住重点和难点！
各类状语从句连接词（短语）一览表：
时间when, while, as, as soon as, since, until, after, before
条件If, unless
原因As, because, since
地点Where
目的So that, in order that
结果So that, so…that, such…that
让步though, although, even if, however
方式As
比较than, (not)as…as,
时间状语从句：
Whenever he comes, he brings a friend. 他每次来都带个朋友。
条件状语从句：
As long as I am alive, I will go on studying. 只要我活着， 我就要学习。
原因状语从句：
Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。
地点状语从句：
Put it where we can all see it.把它放在我们都能看到的位置。
目的状语从句：
Finish this so that you can start another.把这个做完，你可以开始另一个。
结果状语从句：
He was so angry that he couldn‘t say a word. 他气得说不出话了。
让步状语从句：
Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。
方式状语从句：
Students do as the teachers say.学生们按照老师说的去做。
比较状语从句：
The work isn‘t as easy as I thought.这项工作比我想象得难。
例题解析：举一反三，学的更轻松！
易混引导词while, when, as的`区别：
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
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……。如：
This was such a good film that I went to see it several times.
It was such good books that they sell well.
It was such bad weather that I had to stay at home.
He spoke so fast that I couldn‘t follow him.
He is such a lovely boy that we all like him.
=He is so lovely a boy that we all like him.
注：在形容词+可数名词复数/不可数名词结构中，当名词前有many, much, few, little表示数量的多少时，名词前用so。如：
She made so many mistakes that she didn‘t pass the exam.
练习与巩固：熟能生巧，取得好成绩！
选择合适的连接词，完成下列句子。
1.Jim spends a lot of money on books______he is not rich.
2.Kate fell into sleep ______she was listening to the music.
3.----Is David at school today?
----No. He is at home ______he has a bad cold.
4.We won‘t have supper ______my mother comes back.
5.Speak to him slowly ______he may understand you better.
6. ______ she doesn‘t come on Sunday, I‘ll go fishing by myself.
7.It is four years ______I had left that small village.
8. ______the air moves, it is called wind.
9.We will go to the park ______it doesn‘t rain tomorrow.
10.______little boys did ______much work.
11.There are few new words in the passage ______we can‘t understand it.
12.Go back ______you come from.
13.He reached the station ______the train had left.
14.----Do you have a swimming pool?
----No, we don‘t. At least, not ______big ______yours.
15.Give me your paper ______you have finished it.
16.It is raining hard, ______we have to stay at home.
17. ______you work harder, you‘ll never pass the final exam.
18.Look after te children ______I am out.
19.The village is ______far away ______I can‘t get there on foot.
20.That is ______an interesting book ______I can‘t stop reading it.
Keys: 1.though 2.while 3.because 4.until 5. so that
6.Even if 7.since 8.when 9.if 10.Such, do
11.but 12.where 13.before 14.as(so), as15.after
16.so 17.unless 18.while 19.so, that 20.such, that
天使宝贝的
he realized it was not so important after he got what he had desired。1。after he got what he had desired 是一个介词结构。其中what he had desired 是一个由what引导的名词从句，意为“他所希望的事情” 整个从句有名词词性，一同做got的宾语。2。he realized 后面省了that 是吗？ 是的。后面的 it was not so important 是一个that 引导的宾语从句，在这里由于realize，believe，think等等这类表示人的想法的词，比较特殊，在其之后可以省略that.3。that 引导的名次性从句什么时间可省that：宾语从句或表语从句中that有时可以省略，但在以下情况时，that不宜省略。 一、当动词后带有两个并列的宾语从句时，引入第二个从句的连词that不可省略。例如： The teacher told the students (that) they should hand in their homework the next day and that the homework must be signed names by their parents. 老师告诉学生他们要在第二天交上作业，并且作业必须由家长签名。 二、当that前面有插入语时，that不宜省略。例如： Little Alice didn't know, I'm sure, that her sister was going to America. 我确信，小艾丽斯不知道她的姐姐很快就要去美国了。 三、省略答语中，that宾语从句单独出现时，that不可省略。例如： —What did he say? 他说了什么 —That he would visit the Great Wall. (他说)他将会参观长城。 四、当主句的状语部分位于that 宾语从句之前时，that不宜省略。例如： Jane realized at once that she must do with it herself. 珍立刻意识到她必须亲自处理那件事。(如省略that，at once也可能修饰从句，是表示“立刻意识到……”，还是表示“立刻去处理……”，较为含糊) 五、 当that 宾语从句中的状语部分位于从句的前部时，that不宜省略。例如： Tom promised that if he could earn as much as 500 dollars in this month, he would buy a computer for his brother. 汤姆许下诺言，如果他在这个月里能够赚到500美元，他就给他的弟弟买台电脑。 六、当that 宾语从句是双宾语中的直接宾语时，that一般不宜省略。例如： I will never tell anyone that you have ever been there. 我绝对不会告诉别人你曾经去过那儿。 七、当为了强调而把that引导的主语从句位于句首时，that不可省略。例如： That they would take the risk was very clear. 他们将要冒这个险是很清楚的了。 八、当主句中的谓语动词是固定词组时，其宾语that 从句中的 that 不宜省略。例如： Mary has made up her mind that she will study hard for the scholarship, so she can have the chance to go abroad for further study. 玛丽下定决心努力学习以获得奖学金资格，这样她就有机会出国深造了。 九、当that 宾语从句前有 it作其形式宾语时，that不可省略。例如： We think it important that college students should master at least one foreign language.我们认为大学生至少掌握一门外语是很重要的。 十、当引导同位语从句时，that一般不可省略，尤其当that与先行词处于分割情况时。例如： He heard the news that his team had won. 他听到了他的队获胜的消息。 The police report that the drugs had been found appeared in the press yesterday. 毒品已经被发现这一警察报告昨天见报了。 There is a feeling in me that they are cheating me. 我有一种感觉他们在骗我。 十一、当that 宾语从句的主语是非谓语动词或是主语从句时，that不可省略。例如： The doctor said that taking exercise was the best way of losing weight. 医生说运动是最好的减肥方式。 The old lady then explained that what she was looking for was a pair of gloves for a girl. 老太太然后说她寻找的是一双女孩子戴的手套。 注意：当名词性从句已有疑问词引导时，不可再加that。例如： I don't understand that what you said just now. (×) I don't understand what you said just now. (√)
