高中英语考点23 条件、让步和原因状语从句
时间、地点、条件、让步、原因、结果 状语从句讲解 高考英语语法总复习
时间/地点/条件/让步/原因/结果状语从句讲解2022届高考英语语法总复习时间状语从句状语是在句子中修饰动词、形容词、副词等的句子成分，用于表达时间、地点、原因、目的、结果、条件、让步、方式、比较的句子成分。
每一种状语从句都有相对应的引导词如:时间引导词: when, whenever, while, since, as, until, once, as soon as等。
He was pretty ambitious when he was young. 在他年轻的时候，他相当有野心。
Whenever I come to this park, it would remind me of my carefree childhood.(每当我来到这个公园，我都会回忆起我无忧无虑的童年。
)While his wife was busy cooking in the kitchen, he was watching TV in the living room.他妻子在厨房忙于做饭的时候，他在客厅看电视。
(既表示动作同时进行，也形成鲜明对比。
)As the day went on, the weather got worse. (随着时间天气变得更糟了。
)since引导的时间状语有一个特殊的点需要指出，先看例句:It is five years since I smoked.应翻译为:我戒烟已经五年了。
(It is +时间段+since 后所接动词是延续性动词表示时间从该动作结束那一刻开始)。
I have smoked for five years.我已经吸烟五年了。
地点状语从句地点状语从句就是一个从句在句子中表示地点、方位的句子。
常见引导词:where, wherever anywhere, everywhere.1，where引导的状语从句Where there is a will, there is a way.有志者，事竟成。
高中英语状语从句详细讲解及例句
高考英语状语从句练习与讲解状语从句在句中相当于副词做状语,又叫副词性从句。
状语从句分为时间状语从句、条件状语从句、地点状语从句、原因状语从句、目的状语从句、让步状语从句、结果状语从句和比较状语从句。
掌握状语从句应当引导词入手，注意引导词的词义,引导状语从句的引导词都有词思,所以,了解引导词的意思尤为重要。
引导词按意义分为九类:1)时间when , as , while , till , until , before, after , since2)地点where3)原因because , as , since , now that4)条件if , unless , once .so (as)long as . in case5)让步though , whatever (--ever) as, even though, even if6)目的so that, in order that7)结果so ... that8)比较than, as .. as9)方式as , as if1．I fell asleep when ( as , while ) he was doing his exercises .他正作练习时我睡着了。
（时间状语从句）2．When he arrived in Shanghai , his mother met him at the station .他到上海时，他妈妈到车站接他。
（时间状语从句）3．She always sings as she walks .她总是一边走一边唱。
（时间状语从句）4．I waited until he had finished his work .我等到他做完活。
（时间状语从句）5．It was not long before he told me about this affair .不久，他就告诉我这件事。
（时间状语从句）6．He has worked very hard since he entered the factory 自从他进厂，工作一直很努力。
高中英语会考语法复习-状语从句
语法复习六：状语从句由从句担任的状语，在句子中可修饰谓语（或其它动词）、形容词、副词或是整个句子，它可以用来表示时间、地点、原因、目的、结果、条件、方式、比较、让步等。
状语从句是一较大的语法项目，也是近几年高考题中常见的一个重要试点。
高考中已考查了时间、让步、地点、条件、目的等状语从句，这些从句仍是今后高考热点，应作充分准备。
同时对方式状语从句也应引起重视。
（一）时间状语从句表示时间的状语从句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。
e.g. When I came into the office, the teachers were having a meeting.He started as soon as he received the news.Once you see him, you will never forget him.No sooner had I gone to bed than I went to sleep.（二）原因状语从句原因状语从句是表示原因或理由的，引导这类从句的最常用的连词是because, since, as , now that（既然）等，for 表示因果关系时（它引导的不是从句）为并列连词，语气不如because 强。
e.g. He is disappointed because he didn't get the position.As it is raining, I will not go out.Now that you mention it, I do remember.（三）地点状语从句引导地点状语从句的连词是where 和wherever等。
高中英语状语从句用法解析(含练习和答案)
高中英语状语从句用法解析英语语法状语从句类型综述状语从句主要用来修饰主句或主句的谓语。
一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。
尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。
状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。
现分别列举如下:1．时间状语从句常用引导词：when, as, while, as soon as, while, before, after, since , till, until特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely … whenI didn’t realize how special my mother was until I became an adult.While John was watching TV, his wife was cooking.The children ran away from the orchard(果园) the moment they saw the guard.No sooner had I arrived home than it began to rain.Every time I listen to your advice, I get into trouble.2．地点状语从句常用引导词：where特殊引导词：wherever, anywhere, everywhereGenerally, air will be heavily polluted where there are factories.Wherever you go, you should work hard.3．原因状语从句常用引导词：because, since, as, since特殊引导词：seeing that, now that, in that, considering that, given that, considering that, inasmuch as, insomuch asMy friends dislike me because I’m handsome and successful.Now that everybody has come, let’s begin our conference.The higher income tax is harmful in that it may discourage people from trying to earn more.Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable.4．目的状语从句常用引导词：so that, in order that特殊引导词：lest, in case, for fear that，in the hope that, for the purpose that, to the end thatThe boss asked the secretary to hurry up with the letters so that he could sign them.The teacher raised his voice on purpose that the students in the back could hear more clearly.5．结果状语从句常用引导词：so … that, so… that, such … that,特殊引导词：such that, to the degree that, to the extent that, to such a degree that,He got up so early that he caught the first bus.It’s such a good chance that we must not miss it.To such an degree was he excited that he couldn’t sleep last night.6．条件状语从句常用引导词：if, unless,特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition thatWe’ll start our project if the president agrees.You will certainly succeed so long as you keep on trying.Provided that there is no opposition, we shall hold the meeting here.7．让步状语从句常用引导词：though, although, even if, even though特殊引导词：as(用在让步状语从句中必须要倒装)，while ( 一般用在句首)，no matter …，in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whicheverMu ch as I respect him, I can’t agree to his proposal.尽管我很尊敬他，我却不同意他的建议。
高考英语语法复习：八种状语从句的用法
高考英语语法复习：八种状语从句的用法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whilewhen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。
知识点名：状语从句（条件、让步）
知识点名：状语从句（条件、让步）讲义：一、条件状语从句条件状语从句的定义条件状语从句就是在复合句中表示主句动作发生条件的状语从句。
引导条件状语从句最经常用的连词是if，它的意思是“如果”；除此之外，还有其他一些连词，也可用于引导条件状语从句。
条件状语从句的基本用法1. 用if引导：if意为“如果”。
例句：If you cheat in the exam you'll never get away with it. 考试作弊必予追究。
2. 用unless引导：unless的意思是“如果不”“除非”。
例句：Unless you go at once you will be late. 如果你不马上走，就会迟到的。
3. 用as/so long as引导：as/so long as的意思是“如果”“只要”。
例句：I'll remember that day as long as I live. 只要我活着，我就不会忘记那个日子。
4. 条件状语从句的时态：当主句为将来时态或含有将来意义时，条件状语从句习惯上要用一般现在时表示将来意义，而不能直接使用将来时态。
例句：I don't know if it will rain tomorrow. But if it rains tomorrow, I'll stay at home. 不知道明天是否会下雨，但要是下雨的话，我就呆在家里。
句中的第一个if 引导的是宾语从句(if=是否)，从句谓语用将来时态表示将来意义；第二个if引导的是条件状语从句(if=如果)，从句谓语要用一般现在时表示将来意义。
二、让步状语从句引导让步状语从句的连词有though、although和as等。
though和although表示“虽然，纵然”之意，在一般情况下可以互换使用。
在口语中，though较常使用，although比though正式，二者都可与yet或still连用。
原因,比较,条件,目的,让步状语从句
as 表示虽然的时候，要进行倒装；
Child as/though he is , he can live by himself.
eg：Although/though she works very hard ,she makes very little progress.
Hard as she works, she makes very little progress.
As long as it doesn't rain, we can play.
You can go out on condition that you wear an overcoat.
Modern cars are far tougher to steal, as their engine management computer won't allow them to start unless they receive a unique ID code beamed out by the ignition (点火) key.
He looks as if (as though) he had been hit by lighting.
（与事实相反，谓语用虚拟语气。）
It looks as if the weather may pick up very soon.
（实现的可能性较大，谓语用陈述语气。）
He is absent today, because / for he is ill.
He must be ill, for he is absent today.
now that ：既然；
in that :因为，通常只能放在句中，强调重要的，唯一的的原因；
高中英语语法：状语从句知识点
高中英语语法：状语从句知识点状语从句(adverbial clause)在句中作状语，可修饰主句中的动词、形容词和副词等。
状语从句由从属连词引导。
状语从句可放在句首或句末。
放在句首时，从句后面常用逗号；放在句末时，从句前面往往不用逗号。
状语从句根据它们的含义分为时间、地点、原因、目的、结果、方式、让步、条件、比较等九种。
一、时间状语从句1、while, when, whenever和as的用法比较（1）while常表示一段较长的时间或一个过程，强调主句的动词和从句的动词所表示的动作或状态是同时发生的。
它不能表示一时性或短暂的动作。
Don't talk so loud while( as) others are working.别人工作时，请勿大声说话。
（2）when引导的时间状语从句，可指时间的一点，也可以指一段时间，从句的谓语动词可用终止性动词，也可用持续性动词。
when引导的从句表示的具体的时间，从句的动作和主句的动作可以同时，也可以先于主句的动作。
Whenever指任何一个不具体的时间。
It was raining when we arrived. 我们到达时，天正下着雨。
（动作同时，指时间点）When you read the poem a second time, the meaning will become clearer to you.当你再读一遍这首诗，你就更清晰它的含意。
（动作有先后，指时间点，不能用while）Come whenever you like. 你爱什么时候来就什么时候来。
（3）as用as时主句和从句的动作往往同时发生，具有延伸意义，一般同延续性动词连用，有时可译作“一边…一边…”。
As time went on, his theory proved to be correct.随着时间的推移，他的理论被证明是正确的。
As（when）he finished the speech, the audience burst into applause.他讲话结束的时候，听众掌声雷动。
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考点23 让步和原因状语从句考向三、条件状语从句1. if引导的条件状语从句if可引导非真实条件状语从句(见＂虚拟语气＂)和真实条件状语从句。
If he said that, he can’t be telling the truth.如果他说了那样的话，他不可能是说实话。
2. unless引导的条件状语从句unless引导的是否定条件状语从句，在意义上相当于if...not，而且语气较强，一般不用于虚拟语气。
You’ll be late unless you hurry.你会迟到的，如果不赶快的话。
1.(2019·江苏卷·单项填空)The doctor shares his phone number with the patients __________ they need medical assistance.A. if onlyB. as ifC. even thoughD. in case【答案】D【解析】考查状语从句的连词。
句意：医生给了病人他的手机号码，以防病人需要医疗援助。
A. if only 要是……多好；B. as if好像，仿佛；C. even though即使，尽管；D. in case以备，以防，免得，引导条件状语从句。
故选D。
2.(2019·天津卷·单项填空)Tom is so independent that he never asks his parents' opinion _________ he wants their support.A. sinceB. onceC. unlessD. after【答案】C【解析】考查连词辨析。
句意：汤姆是如此独立，以至于他从来不征求父母的意见，除非他想得到他们的支持。
since因为；once一旦；unless除非；after在……之后，根据题意，故选C。
unless在此引导条件状语从句。
3.(2018·北京卷·单项填空) _________ we don’t stop climate change, many animals and plants in the world will be gone.A. AlthoughB. WhileC. IfD. Until【答案】C【解析】考查状语从句。
句意：如果我们不阻止气候变化，那么世界上的很多动植物将会消失。
分析句意及句子结构可知，动植物不灭绝的前提条件是阻止气候变化。
although尽管；while当……时候，尽管；if 如果；until直到。
根据句意可知选C。
4.________ we have enough evidence, we can't win the case.A.OnceB. As long asC. UnlessD. Since【答案】C【解析】考查连词。
句意：如果我们没有足够的证据，我们就赢不了官司。
后句说官司打不赢，用unless 来表示相反的条件。
【名师点睛】条件状语从句就是在复合句中表示主句动作发生条件的状语从句。
引导最经常用的连词是if，它的意思是＂如果＂；也可以用unless引导：unless的意思是＂如果不＂＂除非＂，相当于if not。
3. only if引导的条件状语从句only if在引导条件状语从句时意为＂只有……(才)；只有在……的时候，唯一的条件是……＂。
I’ll let you use the car only if you keep it in good condition.只要你把车保养好，我就让你用。
4. as/so long as引导的条件状语从句as/so long as意为＂只要；如果＂。
As long as it doesn’t rain, we can play.只要不下雨我们就能玩。
You won’t find paper cutting difficult _____you keep practicing it.A. even ifB. as long asC .as if D. ever since【答案】B【解析】句意：只要你不断练习，你不会觉得剪纸很难。
A. even though即使，虽然;B. as long as只要；C. as if犹如，好像；D. ever since自从。
结合句意，此处用as long as引导条件状语从句。
故选B。
5. provided (that)/providing (that)引导的条件状语从句provided (that)/providing (that)意为＂假如；如果＂。
I will agree to go provided / providing (that) my expense is paid.假如为我负担费用，我就同意去。
Providing you promise not to tell anyone else I’ll explain the secret.假如你承诺不告诉别人，我就告诉你这个秘密。
6. on condition that(条件是)和suppose / supposing (that)(假设；如果)也可引导条件状语从句I can tell you the truth on condition that you promise to keep it a secret.我可以告诉你真相，条件是你答应保守秘密。
Suppose/ Supposing (that) they refuse us, who else can we turn to for help?在条件状语从句中，通常要用一般现在时表示将来意义，而不能直接使用将来时态。
不过，有时表示条件的if之后可能用will，但那不是将来时态, 而是表示意愿或委婉的请求(will为情态动词)。
If you will sit down for a few moments, I’ll tell the manager you’re here. 请稍坐片刻，我这就通知经理说您来了。
考向四让步状语从句让步状语从句是状语从句中的一种。
一般翻译为＂尽管……即使……＂就是我们日常生活中用的＂退一步说……＂的感觉。
引导让步状语从句的连词主要有以下这些：though, although, as; even if, even though; whether...or...; no matter+疑问词，疑问词-ever。
下面对这些连词引导的让步状语从句作一说明。
1. although/though引导的让步状语从句although和though，都作＂虽然；尽管＂解，通常可以换用，although的语气较重。
如果要强调＂但是＂语气，可使用yet，still或nevertheless来表示＂但是＂、＂依然＂或＂然而＂之意。
Although they have been talking for a long time, he cannot make her believe him.虽然和她谈了半天，他还是不能让她信任自己。
We had to wait half an hour ________we had already booked a table.A. sinceB. althoughC. untilD. before【参考答案】B【答案解析】句意：尽管我们已经预定了桌子，但还是等了半小时。
分析句子结构可知，此处是让步状语从句，所给四个选项中只有although可以引导让步状语从句。
故选B。
2. even if/even though引导的让步状语从句(1)even if引导的让步状语从句even if ＂即使，纵然＂，从句表示的是尚未发生的动作或存在的情况。
Even if it rains tomorrow, we won’t change our plan. 即使明天下雨，我们也决不改变计划。
Even if I failed again, I will not give up the experiment. 即使我再次失败，我也决不会放弃实验。
(2) even though引导的让步状语从句even though＂虽然，尽管＂，从句所表示的是已经发生的动作或存在的情况，通常可以和although/though 换用。
Even though I didn’t understand a word, I kept smiling. 即使我一个字也不懂，我还是保持微笑。
Even though you say so, I do not believe it. 即使你这样说，我也不信。
(2016·北京卷﹒单项填空)My grandfather still plays tennis now and then, _______________ he’s in his nineties.A. as long asB. as ifC. even thoughD. in case【参考答案】C【答案解析】考查状语从句。
句意：即使九十多岁了，我的爷爷仍然时不时地打打网球。
A.as long as只要，引导条件状语从句；B.as if似乎，引导方式状语从句或表语从句；C. even though即使，引导让步状语从句；D.in case以防，引导目的状语从句。
这里是转折关系，故选C。
3. as引导的让步状语从句as引导让步状语从句时，意为＂尽管，虽然＂，从句多位于主句之前，而且必须使用倒装语序。
通常如果从句中有形容词或名词作表语，则把表语置于句首，而且名词前要省略冠词；如果从句中有修饰动词的副词，则将该副词置于句首；如果从句中有情态动词，则将情态动词后的动词原形置于句首。
此用法与though的倒装完全一致。
(although无此用法)Much as I admire his courage, I don’t think he acted wisely. 我虽然佩服他的勇气，但我认为他这样做是不聪明的。
Strong as you maybe, you cannot lift it. 虽然你可能很有力气，你却无法把它提起来。
Child as he is, he is very brave.尽管他还是个孩子，但是他很勇敢。
1._________，his idea was accepted by all the people at the meeting.A. Strange as might it soundB. As it might sound strangeC. As strange it might soundD. Strange as it might sound2._________，Carolina couldn’t get the door open.A. Try as she mightB. As she might tryC. She might as tryD. Might she as try【参考答案】1.D 2.A【答案解析】分析句子结构可知，以上两题都是有as引导的让步状语从句，因此要要倒装语序。