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高中英语语法系列：状语从句状语从句：状语从句主要用来修饰主句或主句的谓语。
状语从句可分为时间状语从句，地点状语从句，原因状语从句，条件状语从句，让步状语从句，目的状语从句，方式状语从句，结果状语从句。
一.地点状语从句连接词：where,wherever,everywhere,anywhereEg.When you read the book,you'd better make a mark where you have any questions.Wherever you are,whatever you do,I will be right here waiting for you. Wherever you work,you will gain much valuable experience as long as you are willing to work.Everywhere they went,they were warmly received.独特用法：Where—不能翻译成“在……地方”时，通常翻译成“如果”，表示在……条件下。
Eg.有志者，事竟成。
Where you are confident,you will succeed.二.原因状语从句连接词：because,since,as,for,now that,in that,seeing that,considering that, given that,considering that比较：because,since,as和for(1)because语势最强，用来说明人所不知道的原因，回答why提出的问题。
当原因是显而易见的或已为人们所知，就用since或asEg.Mr.Zhang disliked me because I'm handsome and rich.Since/As the weather is so bad,we have to delay our journey.(2)由because引导的从句如果放在句末，且前面有逗号，则可用for代替。
状语从句状语从句是一种副词性从句，通常由一个从属连词或一个起连词作用的词组引导。
状语从句1. 时间状语从句常见的连词(组)：when, while, as, before, after, once, till, until, as soon as, now that, hardly ...when, scarcely ...when, no sooner ...than等。
可以引导时间状语从句的副（介）词（短语）或名词短语：directly, instantly, immediately, by the time, the moment, the second, the minute, the instant, every time, each time, next time, the last time等。
注意点如下：(1) when, while, as引导的时间状语从句as表示“当……的时候”，往往和when/ while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。
when(at or during the time)既可以表示在某一点的时候，又可以表示在某一段时间内，主句与从句的动作或事情可以同时发生也可以先后发生。
while强调一段时间，仅表示从句和主句的动作同时发生，并且有延续意义，该从句中的动词一般要用延续性动词，从句中常用过去进行时态或一般过去时态；当when表示a period of time时，两者可以互换。
She came up as I was cooking.(同时)在我做饭时，她走了过来。
When we were at school, we went to the library every day.(在一段时间内)当我们在学校时，每天都去图书馆。
While they were watching TV, I was preparing myself for the coming examination.他们在看电视，而我在为即将到来的考试做准备。
英语语法《状语从句》课件完整版一、教学内容本节课的教学内容选自人教版高中英语必修5第四单元，主要讲解状语从句的用法。
状语从句是一种从句类型，用来修饰动词、形容词、副词或整个句子，表示时间、地点、原因、条件、方式等。
本节课将详细介绍时间状语从句、地点状语从句、原因状语从句、条件状语从句和方式状语从句的构成及用法。
二、教学目标1. 让学生掌握状语从句的五种类型及其构成；2. 培养学生正确运用状语从句表达句子意思的能力；3. 提高学生对英语语法的理解和运用水平。
三、教学难点与重点1. 教学难点：状语从句的语法结构和用法；2. 教学重点：引导学生运用状语从句表达实际场景。
四、教具与学具准备1. 教具：PPT、黑板、粉笔；2. 学具：笔记本、练习册。
五、教学过程1. 情景引入：教师展示一段对话，引导学生关注其中的状语从句，如： "When I arrived at the station, the train had already left.""If you need any help, please don't hesitate to ask me."让学生分析这些状语从句的类型和用法。
2. 知识讲解：教师运用PPT展示状语从句的五种类型，分别为：a) 时间状语从句：如when, after, before, as soon as等；b) 地点状语从句：如where, wherever, in which等；c) 原因状语从句：如because, since, as等；d) 条件状语从句：如if, unless, until等；e) 方式状语从句：如as, as if, as though等。
教师举例讲解每种状语从句的构成和用法，让学生进行随堂练习。
3. 例题讲解：教师展示一些状语从句的例题，如："I will go to the party if I finish my work.""He waited for her in the hall, wherever she might be."让学生分析这些例题的状语从句类型和用法，并进行小组讨论。
状语从句那你帮小新造个英文句子吧~~~上面这个句子有什么特点吗？一、状语从句的概念用来修饰主句中的动词，副词和形容词的从句叫状语从句。
时间状语从句地点状语从句条件状语从句目的状语从句状语从句分类原因状语从句结果状语从句方式状语从句比较状语从句让步状语从句1. 时间状语从句4. 只能用as的情况1) as表示“随着……”之意时；2) as表示“一边……一边……”时；3)当表示主从句两个短暂性动作同时发生时。
5. 表示“一……就……”的连词或短语1) as soon as，当主句是一般将来时，从句必须用一般现在时表示将来。
2)在hardly.when/ scarcely.when/ no sooner.than结构中，当hardly/ scarcely／no sooner 放在句首时，主句必须用倒装语序；主句的时态须用过去完成时，从句须用一般过去时。
3) the moment，the minute，the second，the instance后直接接从句。
4) immediately，instantly后直接接从句。
6. every morning，every evening，every time，every day，every year（每……）后直接接从句。
7. “it was+时间点+when从句”it指时间点，时间前无介词，when从句是状语从句；当主句是一般将来时，when 从句用一般现在时。
8. before1)…before.表示“没有来得及做某事就……”，主句经常用过去完成时，从句用一般过去时。
2)“it was(not)十一段时间+before从句（一般过去时）”主句是肯定句时，意为“过多长时间才……”；主句是否定句时，意为“没过多久就……”。
3)“it will be(not)十一段时间十before从句（一般现在时）”主句是一般将来时，从句要用一般现在时表示将来。
9. until1)(not)…until…一肯定句中主句的谓语动词必须是延续性动词；否定句中主句的谓语动词经常是非延续性动词，也可以是延续性动词。
高中英语语法系统讲解之十一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……”。
主句中的动词一般用过去完成时，从句用过去时；而且主句一般倒装，把助动词had提到前面。
如As soon as I finish the work, I’ll go to see you.Hardly had I entered the room when I heard a loud noise.○31idea of it. ○2如果将“not until …”结构放在句首，那么主句要写成倒装句。
如Not until we pointed out their fault to them did they realize it.○4every time，each time，next time等名词短语用来引导时间状语从句，表示“每当……，每次……，下次……”。
如Every / Each time I was in trouble, he would come to help me out.Next time you come, do remember to bring your son here.2. 条件状语从句从句可置于句首或句尾，有时还可放在主语和谓语之间。
常用的引导词有if，unless，as long as，so long as，provided，suppose / supposing，on condition（that）等。
如I may not come see you recently unless I can complete the project ahead of time.We can surely attain our goal as long as we are united as one.温馨提示：条件状语从句分为真实条件句和非真实条件句。
○1真实条件句：假设的情况有可能发生的条件句叫真实条件句，用陈述语气。
如He will not leave unless it is fine tomorrow. I’ll write to your parents if you’re late again. ○2非真实条件句：假设的情况完全是一种假设或发生的可能性不大的条件句叫非真实条件句，用虚拟语气。
如If it were not raining now, I would not be staying at home.3. 原因状语从句由从属连词because，as，since，for，now that“既然”等引导。
如Don’t scamp your work because you are pressed for time.As the weather was fine, I opened all the windows.Since we live near the sea, we can often go swimming.It must have rained last night, for the ground is wet.Now that you have known the truth, I needn’t keep it secret.温馨提示：○1because引导的最主要、最直接而且不为人知的原因，语气最强。
回答用why提问的句子只能用because引导。
其引导的从句可放在主句之前或之后。
如You shouldn’t get angry just because some people speak ill of you. ○2as引导的是较为明显的原因，语气较because弱，常常位于主句之前。
如As he didn’t know much English, he often tooka dictionary with him. ○3since引导的是明摆着的、大家都知道的事实，也常位于主句之前。
如Since a lot of people make mistakes in life, you’d better give him a chance. ○4for引导的是一种推测或附加说明，语气最弱，总是位于主语之后，且常用逗号与主句隔开。
如We must start early, for we have a long way to go.4. 让步状语从句常有though，although，even if / though，as，however，whatever，no matter，whether …or …等从属连词引导。
如Though it was very cold, she went out without an overcoat.I won’t mind even if / though he doesn’t come.Young as he is, he knows a lot.However tired you are, you must finish the work in time.Whatever / No matter what you do, do it well.Whether it shines or rains, I will go tomorrow morning.温馨提示：由although（though，as）引导的让步从句，主句不能用but。
由as引导的让步状语从句，须将作标语的形容词、名词（前不用冠词）、表示程度的副词（如much）或动词原形放在句首，构成部分倒装句式。
如Child as he is, he knows much about his family.Much as I love her, I won’t marry her.Try as he might, he failed a second time.5. 目的状语从句常用的引导词有so that，in order that，lest，in case，for fear等。
We should do our utmost in order that we may be able to over fulfill the task.You’d better leave your phone number so that I can call you before I come next time.温馨提示：表示肯定----so that，in order that意为“为了使……发生（目的是……，为的是……）”；表示否定----lest，in case，for fear意为“为了使……不发生（以免，以防）”如He took his umbrella with him lest it should rain.I’ll keep a seat for you in case you should change your mind.6. 结果状语从句常用so that，so … that，such …that等引导。
如I didn’t to early, so that I didn’t get a good seat.Guilin is so beautiful a city that thousands of visitors come to visit it each year.He has made such great progress in English that I can’t help admiring him.温馨提示：such为形容词，其后接名词词组，通常有三种形式：○1such + a（n）（+ adj.）+ 可数名词单数；○2such（+ adj.）+ 可数名词复数；○3such（+ adj.）+ 不可数名词。
如such a good teacher，such useful books，such fine weatherso为副词，其后接形容词或副词，如so fast，so nice等，但是若名词前有many，much，few，little修饰时，则用so 不用such，如so many students，so little money等。
如It was so hot a day that we couldn’t sleep.It was such a hot day that we couldn’t sleep.7. 方式状语从句常用as，just as，as if，as though等引导，放在主句之后。
