高中英语语法---条件状语从句讲解

英语-条件状语从句定义：条件状语从句是表示主句动作发生的前提或条件的从句。

条件状语从句分为真实条件状语从句和非真实条件状语从句。

引导条件状语从句的有if，unless，so / as long as，as / so far as，on condition that，in case，suppose，supposing 等。

条件状语从句中的谓语动词一般要用现在时或过去时代替一般将来时或过去将来时。

知识梳理：初中学习到的引导条件状语从句的连接词主要有：if(如果)、unless(除非)或as long as(只要) 等。

unless 在意思上等于if...not。

一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由if 引导的条件状语从句表示在某种条件下某事很可能发生。

如:If you ask him, he will help you.如果你请他帮忙,他会帮你的。

If you fail in the exam, you will let him down.如果你考试不及格,你会让他失望的。

另外,if 从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。

如: If I were you, I would invite him to the party.如果我是你,我会邀请他参加聚会。

2、unless = if...not. 除非,若不,除非在……的时候Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨,比赛将照常进行。

3、so/as long as 只要You may borrow my book as long as you keep it clean.只要你保持书的清洁，你就可以把我的书借去。

高中英语条件状语从句的句型在高中英语的学习中，学生会学习到很多的重要的句型，下面本人的本人将为大家带来条件状语的句型的介绍，希望能够帮助到大家。

高中英语条件状语从句的句型介绍1条件状语从句句型1When / So long as / As long as / Once +从句，+主句。

(从句也可以放在主句之后。

)如：As long as you give me any money, I will let you go.只要你给我一些钱，我就让你走。

Once you have begun to learn English, you should learn it well. 一旦你开始学习英语，你应该把它学好。

句型2主句+on condition that+从句.如：I will go with you on condition that you give me a sum of money.我和你一起去的条件是你给我一些钱。

句型3主句+unless+从句.(注意：由于unless本身是否定词，所引导的从句的谓语动词用肯定而不用否定。

)如：I will go there tomorrow unless it rains.我明天去那儿除非下雨。

点击查看：高中英语语法大全句型4祈使句，+and/ and then+主句。

(注意：祈使句也可用一个名词短语。

)如：Use your head, and you will find a good idea.动脑筋想一想，你就会想出一个好主意。

Another word, and I will beat you.你再说一句，我就揍你。

句型5If +necessary / impossible/ important等，+主句.(注意：if与形容词之间的it is被省略。

)如：If necessary, I will do it. 如果有必要的话，我来做此事。

2原因状语从句句型1主句+in case+从句.(in case表示以免)如：I will take my raincoat in case it rains.我要把雨衣带上以免下雨。

状语从句1.引导状语从句的连词时间状语从句when（as、while）（当……时候）、since（自从）、before（在……之前）、after（在……之后）、until（till）（直到……才）、whenever（每当）、once （一旦）、every time（每当）、the day（在……那天）、as soon as（一……就）、hardly（scarcely）……when（一……就）、no sooner……than（一……就）、instantly（immediately、directly）（一……就）、the moment（minute、second、instant）（一……就）地点状语从句where（在……地方）、wherever（在任何地方）、every where（在每个地方）原因状语从句because(as、for)（因为）、since（既然）、when（既然）、now（that）（既然）、in that（因为、既然）条件状语从句if（如果）、unless（除非）、as（so）long as（只要）、providing （provided）（that）（假如）、suppose（supposing）（that）（假如）、in case（如果）、only if（如果）、if only（但愿、如果……就好了）、on condition that（条件是）让步状语从句though（although）（虽然）、even if（even though）（即使）、while（虽然、尽管）、whatever（no matter what）（无论如何）、whenever（no matter when）（无论何时）、wherever（no matter where）（无论哪里）、whoever（no matter who）（无论谁）、however（no matter how）（无论怎样）、for all（that）（尽管）、granting（granted） that（即使）、whether……or（不论……还是）、in spite of （despite）the fact that（不管）结果状语从句so that（so、that）（结果）、so（such）……that（如此……以至于）、but that（but）（要不是）目的状语从句so that（so、that）（为了、以使）、lest（以防）、in case（以防、以免）、for fear that（以防）、in order that（为了）比较状语从句than（比……）、as……as（像……一样）、not so（as）……as （不像……一样）、（not）the same as（（不）同……一样）、not so as（不如）、（not）such……as（（不）如……）方式状语从句as（像……、犹如……）、as if（as though）（好像、仿佛）、the way（……的样子）2、时间状语从句（表示时间的状语从句）①when、whenever、while和aswhen意为“当……时候”，表示某个具体的时间。

条件状语从句用法条件状语从句是英语语法中常用的一种从句，用于表达一种条件或前提。

它通常由 if, unless, provided that, as long as 等连词引导，被引导的部分叫做条件状语从句。

条件状语从句可以出现在主句前或主句后，与主句构成复合句，通常用来表示假设、推测、建议等含义，也可以用于表示真实的条件和对现实的想象。

在使用条件状语从句时，需要注意主句和从句的时态、语态、语气等问题。

例如：- If it rains tomorrow, I will stay at home.（如果明天下雨，我会呆在家里。

）- Unless you study hard, you won't pass the exam.（除非你努力学习，否则你不会通过考试。

）- Provided that you finish the project on time, youwill get a bonus.（只要你按时完成项目，你就会得到奖金。

）- As long as you keep practicing, you will improve your skills.（只要你不停地练习，你的技能就会提高。

）需要注意的是，在条件状语从句中，如果从句中的谓语动词是be 动词，通常可以省略 if，并将 be 动词提到主句前面，例如： - If it is sunny tomorrow, we will go to the beach.（如果明天晴朗，我们会去海滩。

）- Sunny tomorrow, we will go to the beach.（明天晴朗，我们会去海滩。

）但是，这种省略 if 的用法通常只适用于口语，不建议在正式的写作中使用。

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。

高中英语语法条件状语从句讲解概念定义由引导词if或unless引导的状语从句叫做条件状语从句。

在英文中，条件是指某一件情况实现之后（状语从句中的动作），其它情况（主句中的动作）才能发生，通常译作“假如”。

（注意：在含有条件状语从句的复合句中，表示今后时态，主句是一样今后时态,祈使句或情态动词，从句要用现在时态,[主将从现原则]（主将从现，将并非指今后时，还指表示今后含义的，跟着if后的那句话是从句。

）类型条件状语从句语法引导条件状语从句最常用的连词是if,由if引导的条件状语从句表示在某种条件下某事专门可能发生。

如：1）If you ask him,he will help you.假如你请他帮忙，他会帮你的。

2）If you fail in the exam,you will let him down.假如你考试不及格，你会让他败兴的if引导的条件状语从句既能够将从句放前面也能够将从句放后面（假如天下雨，我们就不玩了）If it rains,we will stop playing.‘转为We will stop playing if it rains.if引导的条件状语从句另外，if从句还表示不可实现的条件或全然不可能存在的条件，也确实是一种虚拟的条件或假设，从句多用一样过去时或过去完成时。

如：If I were you,I would invite him to the party.假如我是你，我会邀请他参加聚会。

I would have arrived much earlier if I had not been caught in the tr affic.假如没有堵车，我会到的早一点儿。

那么，除了if之外，是否还有其他连词也能够引导条件状语从句呢?回答是确信的，不仅有，还有专门多。

这些词由于显现的频率较小，且用法较复杂一些，因此不如if为大伙儿所熟知罢了。

下面就这些词的用法以例句的形式进行一下简单总结。

2023年高中语法条件状语从句用法说明讲义1. 引导让步状语从句的连词：“though，although，even though，even if ”等连词常被用来引导让步状语从句。

这些词引导让步状语从句时，主句不可用but，但可以用yet或still.例句：Although he tried hard, (yet/still) he failed.尽管他很努力了，但仍然失败了。

Though he was inexperienced, he did a very good job.尽管没有经验，但他表现得很不错。

（1）His first lecture was delivered on Nov.4, 1915, and it explained his new approach, though he admitted he did not yet have the precise mathematical formulation of it本句考查的是由though引导的让步状语从句。

句子前半句为肯定句，后半句为否定句，是典型的转折关系。

【参考译文】他的第一场讲座安排在1915年11月4日，爱因斯坦解释了他的新方法，虽然他也坦承自己尚未找到精确的数学公式。

（2）Although simple versions of miniature devices have hadan impact, advanced versions are still several years away. 本句考查although引导的让步状语从句。

句子前半句为否定句，后半句为肯定句，是典型的转折关系。

【参考译文】尽管简单版的微型装置已经起到了一定的作用，但更高级的微型装置的问世仍需要几年时间。

2. 表示让步转折关系的介词这些介词主要有despite，in spite of，for all和notwithstanding。

高中英语语法状语从句一、基本概念状语(副词性)副词 动词/句子（形容词/其它副词）介词短语、动词不定式、分词短语、形容词、状语从句分类时间、地点、原因、目的、结果、条件、让步、比较、方式二、分论（一）时间状语从句(1) when 引导的时间状语从句①when 引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词，而且可以表示主句的动作和从句的动作同时发生，或者从句的动作发生在主句的动作之前。

when you apply for a job, you must present your credentials.当你申请工作时，你必须递交你的有关证件。

（同时）when the students heard the teacher’s footsteps, they all atopped talking.当学生们听到老师的脚步声时，他们都停止了讲话。

（从句动作发生在前） ② when 还可表示just then （正在那时，突然）的意思，此时其所引导的从句只放在主句之后。

be about to do …when … 正要去做某事，突然……be doing …when…正在做某事，突然……be on the point of doing …when…正在做某事，突然……We were about to start when it began to rain.我们正要动身，突然天下起雨来。

The game had hardly/scarcely/barely begun when it started raining.比赛刚刚开始就下起雨来。

(2) as引导的时间状语从句as引导的时间状语从句其动词的动作是延续性的，而且侧重表示主句和从句的动作交替或同时发生，译为“一边……，一边……”或“随着……”We were having breakfast as she was combing her hair.她梳头时我们在吃早饭。

状语从句状语从句在句中作状语，修饰主句中的动词、形容词或副词等，有时修饰整个主句。

状语从句放在主句之前时，常用逗号分开；放在主句之后，一般不用逗号。

状语从句按其意义和作用分为时间、条件、原因、让步、目的、结果、方式、比较、地点等9种。

1. 时间状语从句时间状语从句可放在句首、句中或句尾。

常用when，while，as，after，before，since，until，once，as soon as，the minute / moment“一……就……”，hardly … when，no sooner …than“刚……就……”等连接词引导。

○1连词when，while，as都表示“当……的时候”，但是when引导的从句的动作和主句的动作可以同时发生，也可以先后发生；用as，while时则强调主句和从句的动作同时发生。

如While I was reading, he came in.As he walked along the street, he sang happily.但当从句表示“随时间推移”时，只能用连词as，不能用when或while。

如As time goes on, I like to speak English more and more.○2从属连词as soon as，immediately，directly，the moment，the minute，no sooner … than …，hardly / scarcely … when …，once引导的从句都表示从句的动作一发生，主句的动作随即就发生，意为“一……就……”，从句中用一般时态代替将来时态。

如Once you remember it, you’ll never forget it.The moment I heard the voice, I knew father was coming.No sooner had we arrived at the station than the train left.温馨提示：as soon as，the moment引导的从句表示“一……就……”；no sooner … than …，hardly … when引导的从句表示“刚……就……”。

关于英语条件状语从句的知识点【—之条件状语从句】关于英语中条件状语从句语法知识的讲解内容，同学们认真看看下面的。

条件状语从句通常由if, unless, as long as等引导,条件状语从句一般放在句首或句尾,特别注意,时间状语从句不允许使用将来时,而应该用现在时替代。

You will certainly fail in the ing final exams unless you work much harder. (即将来到的期末考试你肯定考不及格,除非你更用功。

)If it doesn’ t rain tomorrow, we shall go hiking. (如果明天不下雨我们就要去徒步旅行。

)[注意] 1、because与so；(al)though与but；if与so不可以同在一个句子中成对出现。

2、时间、条件、原因,让步状语从句放在句首时需要用逗号与主句隔开。

以上对英语语法条件状语从句的知识讲解，希望同学们都能很好的掌握，相信同学们会学习的很好的。

中考英语复习指导梳理性复习要立足课本，注重根底。

对、课本上的点，进展梳理性很有必要。

可抓住课本中每个单元的重点单词、词组、重点对话、重点句、目标等根底知识进展第一遍复习，第二遍复习可将分散在课本中的各知识点进展分版块集中稳固。

单词是语言的根底元素。

建议拟定方案，每天用磁带听写3-4个单元的单词。

记住：语音、中文意思、词性是不可别离的，缺少其中一项都会造成某一题型大面积的丢分。

语段阅读，在中占比分较大。

在阅读文段方面，可以买一本单词的小册子，用手遮住中文翻译，对英文单词进展口头快速的翻译;对于超纲生词方面，可以将文段分为、人物、环境、物品介绍、建筑说明、运动等几类，用一个本子记下各类文段中常出现的超纲生词并进展;对于文段中的长句、难句理解上的困难，学生必须要在复习中重点掌握后置定语、状语从句、定语从句、of词组、时间地点状语等知识点的阅读技巧，将它们从句子中提出来先翻译，再理解整句的意思。

状语从句副词性从句（状语从句）（一）时间状语从句：用一般现在时表将来1．When（当……时）引导●从句用一般现在时/现在完成时：when + S.+ do/have done……例：I will let you know when you come.●When it comes to +名词/动名词，表示“当涉及（谈）到…..”例：Doing your homework is a sure way to improve your test scores, and this is especially true when it comes to classroom tests.●若从句用一般过去时，主句用过去进行时/be about to（打算）结构，说明主句用来表示从句发生的背景，when就表示为“正在这时”例：I felt somewhat disappointed and was about to leave, when something occurred which attracted my attention.2．While（当……时）引导●从句用一般现在时/现在完成时：while + S.+ do/have done……3．As（正当……时，一边…..一边）引导4．Whenever（无论何时）引导5．Since（自从……以来）引导●主句过去完成时+ 从句一般过去时：S. + did…since S.+ had done●常见用法：It is + time + since……，表示“自从……以来有（一段）时间”例：It is two years since I last met her.6．Every/each time（每当）引导7．Before（在……之前、趁着……还没有、还没来得及）引导●若从句需要用情态动词的，只能用can/could例：Please tell me the truth before I can guess it.●常见用法：It is/was/will be + time +before……，表示“过一段时间（才）会……”例：“It is a long time since I saw you last.”“Yes. And it will be a time before we see each other again.”8．After（在……之后）引导9．Till/until（直到）引导●一般结构：not…（短暂v）...until……，表示“直到……才….”倒装结构：Not until…….，后面倒装强调结构：It is not until……that……例：They did not stop discussing until they came to a conclusion.= It was not until they came to a conclusion that they stopped discussion.= Not until they came to a conclusion, did they stop discussion.10．As soon as（刚……就）引导例：Come here as soon as you finished the work.11．The moment/minute/instant（刚……就）引导例：I recognized her the moment I saw her.12．Hardly/scarcely/(only)just……when（刚……就）引导●从句一般过去时+ 主句过去完成时：S. + had hardly/scarcely/(only)just done…,when S.+ did●若hardly/scarcely/(only)just置于句首，主句须倒装（had+ S.+ done）例：He had hardly left school when it began to rain.=Hardly had he left school when it began to rain.13．No sooner……than（刚……就）引导●从句一般过去时+ 主句过去完成时：S. + had no sooner done…, than S.+ did●若no sooner置于句首，主句须倒装（had+ S.+ done）例：We had no sooner reached the top of hill than we all sat down to rest.=No sooner had we reached the top of hill than we all sat down to rest.（二）地点状语从句1．Where（在……地方）引导：从句用一般现在时例：Where there is smoke, there is fire.2．Wherever（无论在哪里）引导例：Wherever he may be, he will be welcome.（三）条件状语从句：用一般现在时表将来1．If（如果、假如）引导：用虚拟语气●if引导得从句中，若有were, had, should三词，可以省略if，并且倒装（谓语置前）例：If I had known about it, I would have told you.= Had I known about it, I would have told you.●If从句+主句= 祈使句/省略句+ and +…….例：If you give me some food, I won’t die of starvation（饥饿）.= Some food and I won’t die of starvation;2．Suppose/supposing（假设）引导例：Suppose we cannot get the necessary equipment（设备）, what shall we do? 3．Unless（除非、如果不）引导●Unless从句+主句= 祈使句/省略句+ or +…….例：Unless you give me another drink, I will die of thirst.= Another drink or I will die of thirst.4．As/so long as（只要）引导例：We can surely overcome these difficulties so long as we are closely united.5．If only/only if（只要）引导例：We can surely get gains, if only we work hard.6．In case/lest（万一）例：You should take good care of your kid, in case they are ill.7．Provided/Providing/Given that（假如）引导例：We will let you use the room provided that you keep it clean and tidy.8．On condition that（假如）引导（四）原因状语从句1．Because（因为）引导●表示“直接、唯一的原因”，通常放在句后，可以与not, but, only连用例：He was angry not because we were late but because we made a noise.2．As（因为）引导●表示“显而易见或大家都知道的原因”，语气较弱例：Everyone likes you as you are both kind and honest.3．Since（因为、既然）引导●表示“间接或附带的原因”，通常放在句首例：Since she insists, you must come.4．Now/seeing that（既然）引导例：Now/Seeing that you are all here, let’s try and reach a decision.5．Considering that （考虑到）引导例：Considering that he began learning English only a year ago, he speaks very well. 6．In that（由于、因为）引导例：He was late in that he didn’t catch the first bus.（五）让步状语从句1．Though/although/as（虽然）引导●Though/although…..yet连用，表示“虽然…..但是……”例：Though/although we cannot see air, (yet) it exists everyone.●as引导得从句置于句首，且倒装（表语、状语、动词置于as前）表语倒装：可以省略冠词例：Tried as I was, I stayed up late studying last night.Children as he is, he knows a lot of English.状语倒装：Fast as he read, you can’t finish novel in three days.谓语动词倒装：Try as he would, he couldn’t lift the rock.2．Even if/though（即使）引导例：Nobody lost his patience as though the meeting was long and boring. 3．However/no matter how（无论如何/怎样）引导例：We’ll continue to work, no matter how/however hot it is.4．Whatever/no matter what（无论什么）引导例：Whatever/no matter what r you may do, do your best.5．Whoever/no matter who（无论谁）引导例：Whoever/no matter who all cannot break the rules, we must keep the law. 6．Whether……or/no matter whether…..or….（不管……还是）引导例：Whether/no matter whether you can do or cannot do, you must try it. 7．Whether or not/whether……or not（不管是否……）引导例：Whether or not we had a baby, we couldn’t survive only on my salary.= Whether we had a baby or not, we couldn’t survive only my salary.（六）方式状语从句1．As（如，按照）引导例：When in Roma do as the Romans do.2．Just as（正如）引导例：Most plants need air just as they need water.3．As if/though（好像，仿佛）引导●引导的从句常用虚拟语气，除了叙述的情况实现的可能性较大例：He speaks English as if/though he were an Englishman.例：It looks as if/though the coming autumn harvest will be even better than the last one. （七）目的状语从句1．So that（以便、为了）引导●从句中谓语部分可以用can/could，may/might例：I will give you my phone number, so that you can call me when you arrive here. 2．In order to（以便、为了）引导●从句中谓语部分只能用may/might例：We should do our utmost最大可能in order that we may be able to overfulfil 超额完成the task.3．For fear that/lest（以免、以防）引导●从句用虚拟语气“should +V.”例：Batteries 电池must be kept in dry place for fear that/lest electricity should leak 渗漏away.4．In case（以免、以防）引导●从句中谓语部分不用虚拟语气例：Better take more clothes in case the weather is cold.（八）结果状语从1．that（因而）引导例：What’s the matter that they still haven’t answered our e-mail?2．so that（因而）引导●主句，+ so that，且从句中谓语部分只能用may/might例：The temperature is increased , so that the volume of the gas can become greater. 3．So…..that（如此……以至）引导●so +形容词/副词+a/an+名词+ that例：It is so hot a day that we cannot sleep.●so置于句首时，需倒装状语例：So fast did he run that I could not keep up with him●so + much/little/few/many + that，而不用such…..that例：She has so little education that she is unable to get a job.4．Such…..that（如此……以至）引导●Such +名词（可数的单数名词）+ that例：It is such a lovely day that everybody is feeling happy and gay.（九）比较状语从句1．Than（比……）引导例：There are more vocabularies in this unit than in that one.2．As……as（如……一样）引导●As +形容词/副词+a/an+名词+ as + 省略句例：He is as clever a boy as his brother.例：This book is nearly as thick as that one(is).3．Not so……as（不如……一样）引导●As +形容词/副词+a/an+名词+ as + 省略句例：You are not as tall as she.4．The+比较级，the+比较级（越……越…….）引导例：The hotter that air becomes, the lighter it gets.例题1、（）______ your daughter has not come back , let me take you to the Friendship Hospital.A WhenB SinceC ThatD For2、（）______ Tom is not feeling well today , he has to stay at home.A ThoughB ForC FindingD As3、（）They are ______ hard-working students that they have already made ______ much progress since thay came here.A so ; soB such ; suchC so ; suchD such ; so4、（）______ we have finished the book we shall start doing some exercises.A For nowB Since nowC Now thatD Since now5、（）He asked us not to be noisy ______ we should wake the baby.A in cseB in the caseC in case ofD in this case巩固练习1、（）______ you are familiar with the auther`s ideas , by reading all the sections as quickly as you can.A Ever sinceB As long asC So thatD Now that2、（）The boy has to learn ______ things that he hardly has time for play.A so manyB such manyC so fewD such few3、（）In the old days the poor worker worked long hours every day ______ he could support his whole family.A becauseB thoughC unlessD so that4、（）Tell him that I will call him back , ______ he gives me a call.A in most casesB in caseC in any caseD in case of5、（）______ you have reminded me , I will try to be a teacher.A Now thenB So thatC Now thatD In order that6、（）You will have to study for many years ______ you may become a brain surgeon.A in order thatB in thatC althoughD soKey 1~5 BDDCA 1~6 DADBCA二、习题1、（）It is almost impossible to become skilful in speaking a language ______ you use it constantly.A but forB if onlyC exceptD unless2、（）Everything will be all right ______ Tom is left to do the work in his own way.A as far asB mean whileC so long asD in case3、（）Do remind me of the date again tomorrow ______ I forget.A in caseB except thatC even ifD as though4、（）You must do the experiment ______ the teacher told you.A asB sinceC so thatD unless5、（）I could not resist having another piece of cake even ______ I was supposed to lose weight.A althoughB howeverC otherwiseD though6、（）______ I suggest , he always disagree.A WhatB HowC WhateverD How a7、（）However ______ you hate them , you must work with them.A very muchB too muchC much tooD much8、（）Try ______ he might , Tom could not get out of the trouble.A as ifB altoughC ifD as9、（）______ whales are very large , they are no longer an even match for man.A SinceB BecauseC Now thatD Although10、（）Man must have food just ______ plants must have sunlight.A forB likeC becauseD as巩固练习1、（）______ I know , the visitors are all satisfied with the arrangement in the next few days.A As far asB As long asC As well asD As soon as2、（）______ convincing an argument is , it needs support of evidence.A No matterB ThoughC HoweverD As3、（）Anyone can borrow books from the library ______ he has a library card.A so long asB sinceC even thoughD unless4、（）______ much advice I gave him , he did exactly what he wanted to do.A HowB WhateverC WhatD No matter how5、（）Remember , science requires your whole life ______ you had two lives to give , they would not be enough.A AlthoughB ThoughC If onlyD Even if6、（）I am sure that Laura`s latest play , ______ staged , will prove a great success.A sinceB unlessC onceD until7、（）Send us a message , ______ you have any difficulty.A in case thatB in caseC whileD as8、（）Electricity flows through a wire ______ water flows through a pipe.A whileB just asC much asD whenever9、（）Food shortage will long be a world problem ______ much has been done to supply enough for everyone.A althoughB evenC no matterD since10、（）I do not like the city , ______ though I have been living here for more than ten years.A evenB asC everD butkey1~5 DCAAD 6~10 CDDDD 1~5 ACADD 6~10 CBBAA。

条件状语从句英语语法总结条件状语从句是英语中常见的一种从句形式，用于表达条件或假设情况下的结果。

以下是关于条件状语从句的总结：1. 结构：条件状语从句由一个条件状语从句引导词（if, unless, provided that, as long as等）+ 一个主句构成。

2. 类型：条件状语从句可以分为三种类型。

- 真实条件句（Real conditional sentences）：表示在实际情况下的可能性。

- 如果主句使用一般现在时，从句使用一般现在时。

- 如果主句使用一般过去时，从句使用一般过去时。

- 例：- If it rains, I will stay at home.（如果下雨，我会呆在家里。

）- If I had time, I would go to the party.（如果我有时间，我会去参加派对。

）- 虚拟条件句（Unreal conditional sentences）：表示不可能或假设情况下的结果。

- 如果主句使用过去完成时，从句使用过去完成时。

- 如果主句使用 would + 动词原形，从句使用过去完成时。

- 例：- If I had known, I would have helped.（如果我知道了，我会帮忙的。

）- If I were you, I would study harder.（如果我是你，我会更加努力研究。

）- 反对现实条件句（Contrary-to-fact conditional sentences）：表示与现实相反的假设情况下的结果。

- 如果主句使用 would + 动词原形，从句使用过去式。

- 例：- If I were rich, I would travel the world.（如果我富有，我会周游世界的。

）- If I knew the answer, I would tell you.（如果我知道答案，我会告诉你的。

）3. 注意事项：- 虚拟条件句中使用“were”代替“was”，与单数和复数主语无关。

高考英语语法复习状语从句知识讲解一、概述常见的有although/though/even though引导的让步状语从句。

if/unless引导的条件状语从句。

until/when/while/as soon as引导的时间状语从句。

because引导的原因状语从句，so that引导的目的状语从句等。

if引导的条件状语从句和when引导的时间状语从句一般都会和时态相结合，即主要考查“主将从现”原则。

对于状语从句的学习可与专题六从属连词相结合。

在时间状语从句和条件状语从句中，主句和从句的时态一致问题一般有两种情况：（1）“主将从现”：主句用一般将来时，而从句用一般现在时。

常见的使用“主将从现”原则的连词有：表示时间的when, while, after, before, until, till, whenever, as soon as, as long as, once 等；表示条件的if, unless, so long as, in case等。

（2）“主祈从现”：若主句是祈使句，或主句中有情态动词时，那么从句用一般现在时表示将来。

（3）“主情从现”：若主句有情态动词, 那么从句用一般现在时表示将来。

如：You can get good grades if you study hard.如果你努力学习，你将取得好成绩。

状语从句由从属连词引导,与主句连接,位于句首时,常用逗号与主句分开,位于句末时,其前一般不用逗号。

状语从句根据其用途可分为时间状语从句、条件状语从句、原因状语从句、目的状语从句、结果状语从句、让步状语从句、比较状语从句、地点状语从句等。

二、时间状语从句(1)当主句是一般将来时态或祈使句,表示将来的意义时,从句通常用一般现在时,简称“主将从现”。

I’ll ring you up as soon as I get to Beijing.我一到北京就给你打电话。

(2) when引导的时间状语从句,通常表示主句和从句的动作同时发生;before表示主句的动作发生在从句的动作之前;after则表示主句的动作发生在从句的动作之后;as引导时间状语从句时,往往表示主句和从句的动作同时发生,不分先后。

状语从句的引导词及语法规则状语从句是英语语法中的重要部分，它能够在句子中充当副词的角色，用来描述或者修饰主句。

状语从句的引导词和语法规则有很多种，本文将对常见的引导词及其语法规则进行详细介绍。

一、引导词1. 时间状语从句时间状语从句用来表示动作或事件发生的时间。

常见的引导词包括：when（当...时候）、while（当...期间）、as（当...时候）、before（在...之前）、after（在...之后）、since（自从...以来）、until（直到...为止）等。

例如：- I will call you when I arrive.（我到达的时候会给你打电话。

）- He was studying while his sister was playing.（他姐姐在玩的时候他正忙着学习。

）- As the sun rose, the birds started to sing.（太阳升起时，鸟儿开始唱歌。

）2. 条件状语从句条件状语从句用来表示某种条件下的结果。

常见的引导词包括：if （如果）、unless（除非）、as long as（只要）、in case（万一）、provided（以...为条件）等。

例如：- If it rains, we will stay at home.（如果下雨，我们就待在家里。

）- Unless you finish your homework, you cannot go out to play.（除非你完成作业，否则不能出去玩。

）- You can go swimming as long as you wear a life jacket.（只要你穿上救生衣，就可以去游泳。

）3. 原因状语从句原因状语从句用来表示某个行为或状态的原因。

常见的引导词包括：because（因为）、since（因为）、as（由于）、for（因为）、due to（由于）等。

例如：- He couldn't come to the party because he was sick.（他因为生病所以不能来参加派对。

条件状语从句英语语法要点什么是条件状语从句？条件状语从句是英语中一种常见的从句类型，它用于表达一个条件和所产生的结果之间的关系。

条件状语从句通常由一个条件状语从句引导词引导，如“if”、“unless”、“providing (that)”等。

条件状语从句引导词引导，如“if”、“unless”、“providing (that)”等。

条件状语从句的构成条件状语从句由一个主句和一个从句构成，从句用来表达条件，而主句则表达结果。

条件状语从句引导词以下是一些常见的条件状语从句引导词：- “if”: 当条件从句中的条件为真时，主句发生。

- “unless”: 如果不满足条件从句中的条件，主句发生。

- “providing (that)”: 当条件从句中的条件为真时，主句发生。

- “as long as”: 只要条件从句中的条件为真，主句发生。

- “in case”: 以防条件从句中的条件发生，主句发生。

条件状语从句的语序条件状语从句通常采用陈述语序，即主语+谓语动词+其他成分。

陈述语序，即主语+谓语动词+其他成分。

例如：- If it rains tomorrow, we will stay at home.- Unless you study hard, you will fail the exam.是否使用逗号在条件状语从句中，通常只有在从句位于主句之前时才使用逗号。

例如：- If you have any questions, please let me know.- I will go to the party if I finish my work on time.省略条件状语从句的主语和谓语在条件状语从句中，当主句和从句的主语和谓语相同时，可以省略条件从句中的主语和谓语。

例如：- If you can, I can too.特殊情况：倒装句在某些情况下，条件状语从句的主句可以采用倒装语序。