(完整版)高中英语状语从句讲解及练习
状语及状语从句(语法加练习完整讲解)
结果状语从句
The problem is so difficult that it will take us time to work it out. 这道题如此难以至于我们要用很多时间才能解决。
She is such a kind girl that everyone likes her. 她非常善良，以至于每个人都喜欢她。
not that...but that...(不是因为...而是因为)
条件状语从句
If you want to succeed, you'd better work hard. 如果你想成功，最好努力工作。 I'll come unless it rains. 除非下雨，否则我一定来。 You can borrow the book as long as you promise to keep i Ming studied so hard that he caught up with the others very quickly． 李明学习如此努力，结果很快赶上了其他人。
6．程度状语： I nearly forgot what he had promised． 我几乎忘记了他答应的事。
(2)如果动词前有一个或几个助动词，状语位于第一个 助动词之后。 He has already had his lunch．他已吃过午饭了。
(3)如果动词是be，状语就放在be动词之后。 He is always at home. 他总是在家。
3.状语位于句末，这是状语的通常位置。
We get up at six in the morning. 我们早晨六点起床。
三、状语的分类：
状语按用途可分为：地点、时间、原因、目的、 结果、条件、让步、程度、方式、伴随情况等几类。
完整版)高中英语状语从句讲解及练习
完整版)高中英语状语从句讲解及练习状语从句是指在句中作状语的从句，可以分为时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。
时间状语从句的连词有when、as、while、until、not…until、before、after、since、the minute、the moment、each、every、next、the first time等。
时间状语从句一般使用一般现在时或一般过去时。
当使用when、as、while这三个连词引导时间状语从句时，它们都表示“当…的时候”，但侧重点有所不同。
例如，当使用when引导时间状语从句时，从句的主语与主句主语相同，如果谓语动词是be动词，则从句主语和be可以省略。
而as则不仅表示“当…的时候”，还可以表示“一面…一面”或“随着”。
而while则强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。
当使用until、not…until时，它们表示“直到…才”。
在肯定句中，主句常用延续性动词；在否定句中，主句常用短暂性动词。
需要注意的是，当not until…位于句首时，主句需要倒装。
例如，“Not until you had explained how did I manage to do it.”It was dark when he finally returned。
XXX the machine type upon seeing it。
As soon as I arrived home。
it began to rain。
Hardly had I arrived home when it began to rain。
XXX: real XXX: if。
even if/though。
unless/if。
not。
as long as/so long as。
as far as/so far as。
provided/providing(that)。
高中英语状语从句讲解与练习
高中英语状语从句讲解与练习高中英语状语从句一、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beabouttodo……when……，bedoing……when……，haddone……when……，beonone’sway……when……，beonthepointofdoing…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）则表示“当……时候”，鼓励的动作必须就是延续性的。
（2）用做同列连词，则表示相对关系“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/solongas，意为“只要”。
3、as的用法（1）则表示“当……时候”，特别强调同时出现，不所指先后。
（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“正像，正如”，“做为”，“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）itwillbe/was时间段before通常现在时/通常过去时。
在肯定句中，意为“多长时间之后才”；在否定句中，意为“用没法多长时间就”。
5、until和till（1）与肯定句连用，必须是延续性动词。
（2）与否定句属格，必须不为延续性动词，则表示“直至……才，在……之前不……”。
特别注意：notuntil可以用作特别强调句和倒装句强调句：itis/wasnotuntil…that…倒装句：notuntil放句首时，主句要部分倒装。
高中英语状语从句讲解及配 套练习
状语从句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。
掌握状语从句应当从引导词入手，注意引导词的词义,引导状语从句的引导词都有词义，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 if一、时间状语从句引导时间状语从句的连接词除上述外还有：1）till, not … until …, until, before, sinceDon’t get off the bus until it has stopped.He waited for his father until（till）it was twelve o’clock.It will be five years before he returns from England.常用句型：It is/was/will be …before…要过多久才……It isn’t /wasn’t/won’t be…before…没有多久就……It will be another five days before we finish this task.It is not long before I forgot it all.2）hardly / scarcely … when, no sooner … than, as soon as, once表示“一……就”3）directly, immediately, the moment, the minute that… 一……就He made for the door directly he heard the knock.4）each time, every time, by the time（到……为止）Each time he came to my city, he would call on me.注意：表示未来情况，主句用将来时，从句用现在时。
英语时间状语从句讲解与练习(完整版)
英语时间状语从句讲解与练习英语时间状语从句讲解与练习when, while 和 as 引导时间状语从句的用法这三个词的意思很简单，都有“当……时候”的意思。
但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。
别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。
现根据大量的实例和个人的思考，做一点小结，供大家参考。
一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。
2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。
3. Were you writing when the teacher came in 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
5. He was on the point of leaving when someone knocked at the door. 他正要走，这时有人敲门。
6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。
7. I had hardly[scarcely] closed my eyes when someone knocked at the door. 我刚一闭上眼，就有人在敲门了。
根据以上的例句，我们可以总结出一点：when 从句的A事件，相当于另一个事件B发生的时间点。
也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。
高中英语状语从句专项讲解及练习（有答案）
高中英语状语从句专项讲解及练习（有答案）状语从句1、地点状语从句地点状语从句表示地点、方位，这类从句通常由where, wherever, anywhere, everywhere引导。
Where there is a will, there is a way.有志者，事竟成。
They will go where they are happy.他们想到他们觉得快乐的地方去。
We must camp where we can get water. 我们必须在能找到水的地方露营。
地点状语从句与定语从句的区别:在于分句在句中作什么成分。
作状语，则是状语从句；作定语修饰名词，则是定语从句。
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；而状语从句前则无需先行词。
如：Go back where you came from.(where引导地点状语从句）Go back to the village where you came from.(where引导定语从句，修饰village)We went home, where we had dinner. (where引导定语从句，修饰home)2、原因状语从句原因状语从句一般由because(因为)，since(既然)，now that(既然，因为)，as(由于)等连词引导。
（1）because表示直接的原因，表示原因的语气最强，常表示必然的因果关系。
回答why引起的特殊疑问句，只能用because。
Jane wore a raincoat because it was raining.因为天下雨，所以詹穿着雨衣。
He is absent today because he is ill.他今天缺课，因为他病了。
（2）since表示对方已经知晓、无须加以说明的原因或事实，语气比because稍弱。
I'll do it for you since you are busy.既然你忙，我来替你做吧。
高中英语状语从句讲解及练习
状语从句在复合句中作状语，位置灵活。
状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。
（一）时间状语从句1.when,as,whilea.when表时间，从句既可以用延续性动词，又可以用瞬间动词。
Eg:WhenIgetthereIwillcallyou.如果when引导的时状的主语与主句的主语相同，而从句的谓语又是be动词时，那么从句中的主语与be可省。
Eg：When（youare）introuble,youcanaskherforhelp.如果when引导的时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。
Eg：WhenIcameintotheroom(Whencomingintotheroom),Ifoundthelightwasoff.b.while表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。
主句的谓语动词通常是非延续性动词。
Eg:HecameinwhileIwasreadingabook.ImetherwhileIwasinschool.c.as表时间，与when相似，但侧重强调主从句动作同在时间点或同时间段进行。
同时可表示主句的动作随着从句的动作的变化而变化。
Eg:Hejumpsashesings.Asthewindrose,thenoiseincreased.2.before(在……之前)与after（在……之后）Eg：Seemebeforeyouleave.IsawthemafterIarrived.3.till与until肯定形式表示的意思是"做某事直至某时"。
否定形式表达的意思是"直至某时才做某事"。
Eg:Waittill/untillIcallyou.等着直到我叫你。
Shedidn'tarrivetill/until6o'clock..她直到6点才到但是置于句首时只可用untill.Untilyoutoldme,Ihadheardnothingofwhathappened.直到你告诉我以前，出了什么事我一点也不知道。
高中状语从句综合讲解及练习
高中英语状语从句★注意：1.需要倒装的情况：1) hardly, scarcely 或no sooner等置于句首例如：我一到家就开始下雨了。
Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain.2) Not until …在句首，主句用倒装。
例如：直到19 世纪初，人类才知道热能是什么。
直到我开始工作，我才认识到了我已蹉跎了几多岁月。
Not until the early years of the 19th century did man know what heat is.Not until I began to work did I realize how much time I had wasted.2.When,as,while用法区分：1)当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或while。
例如：When you have finished your work, you may have a rest.2)如从句表示"随时间推移"，连词能用as，不用when 或while。
例如：As the day went on, the weather got worse.★练习1. last week, she lived a quiet and happy life in that area.A. Not until the earth-moving machines cameB. The earth-moving machines cameC . Until the earth-moving machines came D. Then came the earth-moving machines2. —when has the country been open to international trade?—1978, I suppose.A .Since B.In C.From D.After3. The project won’t carry on we can get financial aid from the government.A .unless B.though C.whether D.until4. The number of women dying from breast cancer has fallen to its lowest level ____ records began in 1971.A. whenB. before C . since D. after5. Nancy enjoyed herself so much she visited her friends in Sydney last year.A. thatB. which C . when D. where6. You see the lightning it happens, but you hear the thunder later.A . the instant B. for an instant C. on the instant D. in the instant7. they visited the Science Museum, they showed great interest in everything they saw.A . The first time B. For the first time C. At first D. At the first time8.How long do you think it will be we can find a new water source?A. after B . before C. when D. since9.We were beginning to discuss suddenly a great earthquake happened.A . when B. while C. until D. before10.No sooner had rescue forces reached the earthquake-stricken area they got down to saving those buriedbeneath the debris.A. whenB. then C . than D. until11.I found her nice and honest I saw her.A. for the first time B . the first time C. on the first time D. at first★注意：For和because用法区分For引导的从句并不说明主句行为发生的直接原因，只是提供一些补充说明，且不可位于主句前。
高考状语从句讲解和练习题
⾼考状语从句讲解和练习题定义——在复合句中由从句表⽰的状语称作状语从句，状语从句由从属连词引导，也可以由⼀个起连词作⽤的词组引导，有时甚⾄不需要连词⽽直接和主句连接起来。
类型——时间、地点、原因、结果、条件、⽬的、让步、⽅式、⽐较状语从句。
1.引导词when, while, as, as soon as, once, before, after, every time, each time, since, whenever, ever since, until ,till等。
2.whenever, each time, every time的⽤法。
注：whenever=no matter whenevery time / each time 每次，whenever 每当······时，表⽰习惯性、经常性的动作。
Whenever we met with difficulties, they came to help us.Each time he came to town he would visit our school.Eevery time I went to his house, he was out.注：whenever=no matter whenwhenever既可以引导时间从句也可引导名词性从句，no matter when只可以引导时间状语从句。
It does not matter whenever the party begins.3.before的汉英表达1）before的基本含义是“在·····以前”The train had left before he got to the station.注意：与before对应的是after引导的时间状语从句，表“在·····之后”。
状语从句讲解及习题附答案
状语从句讲解及习题附答案（一）状语从句概述定义状语从句用作状语，是起副词作用的句子。
位置状语从句可以放在主句之前，也可以放在主句之后，时间、条件、原因和让步状语从句放在句首时需要用逗号和主句隔开。
分类根据其作用可以分为时间、地点、原因、条件、目的、让步、方式和比较等状语从句。
作用它可以修饰谓语、非谓语动词、定语、状语和整个句子。
（二）状语从句详解1. 时间状语从句引导词用法示例when 意为“当…的时候”。
When引导从句的谓语动词可以是延续性动词，也可以是瞬间动词。
并且when有时表示“就在那时”A liar is not believed when he speaks the truth.说谎者讲真话时也没有人相信。
When he arrives, I’ll call you. When you laugh and smile, your body relaxes.while 意为“在…的时候，在…的同时”。
While引导从句的谓语动词必须是延续性的，发生时间较长，并强调主句和从句的动作同时发生（或者相对应）。
While有时还可以表示对比。
While I was standing at the window, I saw several boys running along the street.While John was watching TV, his wife was cooking.as 意为“一边…一边…”。
As引导的动作是延续性的，发生时间较短，一般用于主句和从句动作同时发生；as也可以强调一前一后。
The writer was angry as he was travelling on a train to London because someone had invaded his “space”.He smiled as he stood up.after 意为“在…之后”。
(完整版)高中时间状语从句语法及练习
(完整版)高中时间状语从句语法及练习时间状语从句是一个复合句结构，用来表示时间关系。
在高中英语研究中，时间状语从句是一个重要的语法点。
本文将为你详细介绍高中时间状语从句的语法规则，并提供一些练题目。
一、时间状语从句的定义和用法时间状语从句是用来表示时间关系的从句，它可以在句子中充当状语。
时间状语从句通常使用连词来引导，常见的引导词有：when, while, before, after, as, since, until, etc. 时间状语从句可以出现在主句的前面或后面。
二、时间状语从句的语法规则1. 当主句的谓语动词表示将来时，时间状语从句中的谓语动词可以使用一般现在时代替一般将来时。
例：I will call you when I arrive home.（主句使用了将来时，从句中使用了一般现在时）2. 当主句的谓语动词表示过去时，时间状语从句中的谓语动词可以使用一般过去时或过去完成时代替。
例：She had finished her homework before she went to bed.（主句使用了过去时，从句中使用了过去完成时）3. 当时间状语从句表示一个惯性的动作或一个客观事实时，从句中的谓语动词可以使用一般现在时。
例：I always go for a walk when it is sunny.（从句中表示惯性的动作）三、时间状语从句的练题目1. 选择正确的连词填空：― She fell asleep _______ she finished her book.1) while 2) because 3) after― We will start the meeting _______ everyone ar rives.1) before 2) since 3) until2. 改写句子，将主句的谓语动词改为表示将来时：― I will call you when I have time.3. 改写句子，将主句的谓语动词改为表示过去时或过去完成时：― He went to bed before he finished his work.以上是关于高中时间状语从句的语法规则及练习题目的详细介绍。
高中英语 高中状语从句讲解及习题
高中状语从句讲解+练习高中英语状语从句用法解析一、定义：在句中作状语的从句是状语从句，修饰主句中的动词、形容词或副词等。
状语从句由从属连词引导，从属连词在句中不充当句子成分，只起连接作用，状语从句放在句首时，要用逗号，放在句尾时不用。
二、分类根据意义上的不同，状语从句可分为：①时间状语从句②地点状语从句③原因状语从句④目的状语从句⑤条件状语从句⑥结果状语从句⑦让步状语从句⑧方式状语从句⑨比较状语从句三、时间状语从句主句是一般将来时，时间状语从句____________表将来：“主将从现”；主句是一般过去时，从句用____________。
（一）引导时间状语从句的连词有：As, when (whenever), before, after, as soon as, until (till), since, every time, once.（二）、具体应用1）“while”主、从句动作或状态同时发生。
用while引导的从句用__________动词，记忆：While 后用进行时。
(当我们正在吃晚饭) , all the lights went out.Please keep quiet(当别人学习的时候)。
While (昨天晚上我正在写信的时候)he waswatch ing TV.2）When表示“就在……的时候”,One evening Beethoven was walking in a street, ________________(他突然停了下来)outside a little house.while意为虽然，然而，表示转折。
__________________________我喜欢打篮球，而我弟弟喜欢踢足球。
_____________________________我正在写作业，而他在看电视。
————————————————我穿着蓝色的衣服，而他穿着绿色的衣服。
———————————————虽然他喜欢他的学生，但是他对他们很严格。
(完整版)高中英语状语从句讲解及练习
状语从句状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。
一、时间状语从句弓丨导时间状语从句的连词有：whe n, as, while, un til, not …un til, before, after, sin ce, the minute,the moment, each( every, next, the first) time 等。
时间状语从句中一般用一般现在时或一般过去时。
1. When , while, as都可解释为"当'、'的时候”但侧重点有所不同。
1) WhenEg: When I arrived home , I had a little rest.注意点：when从句的主语与主句主语相同，谓语动词是be动词时，从句主语和be可以省略。
Eg: When (she was) walking along the street, she met her class teacher.2) AsAs 除了表示“当'''的时候”，还可表示为“一面'''一面”，“随着”Eg: He sang as he danced.一面'''一面)You will grow wiser as you grow older.( 随着)3) While 表示“当'''的时候” 强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。
Eg: While we were working, they were having a rest.While (they were) having a discussion, they got very confused.注意点：while 有对比的含义，解释为“然而” 。
eg: I prefer black tee, while he likes coffee.2. until, not…until表示"直到'、'才”，在肯定句中主句常用延续性动词；在否定句中主句常用短暂性动词。
(完整word版)高中英语之状语从句导学案+练习
状语从句状语从句在句子中可修饰谓语、形容词或是整个句子，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。
一、时间状语从句可由when, as, while, after, before, till(until), since, by the time, once, as soon as, the moment引导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.注意：not…until的用法和强调句结构。
如：I didn’t realize that I had left my key in the office until I arrived home.It was not until I arrived home that I realized that I had left my key in the office.在hardly/scarcely…when… , no sooner…than…句式中，把hardly/scarcely/no sooner置于句首时，第一个分句采用部分倒装语序。
第一个分句用过去完成时，第二个分句用一般过去时Hardly had he sat down when there was a knock at the door.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时表示原因或理由的，引导这类从句的最常用的是because, since, as, now that等，for表示因果关系时为并列连词，常位于句尾，其前有逗号，语气最弱。
高中英语状语从句练习与讲解含答案
高中英语状语从句练习与讲解状语从句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 if例如:1．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。
高考英语状语从句讲解及练习课件
He is not so/as clever as his brother.
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9.比较
_____ they had worked for along time, everyone looked tired. A． While B． After C． Unless D． For He has been a teacher ______ he came to the country. A． since B． until C． as D． when
He couldn't come ______ he wanted to. A． as B． because C． although D．for _____ you gave a party and no one come, what would you do? A． Although B． If C． Unless D．When
8． The man put on a overcoat ______ keep himself warm. A． that B． so that to C． in order that D．in order to 9． He has changed so much ______ I can hardly recognize him. A． as B． so that C． that D．but
17 He always thinks I'm wrong, ______ I may say. A． no matter whatever B． whatever C． what D． that 18． ______ , Mother will wait for him to have dinner together. A． However late is he B． However he is late C． However is he late D． However late he is
高考英语状语从句详解习题加答案
高考英语状语从句详解习题加答案状语从句1. 在主从复合句中修饰主句中的动词，形容词，副词等的从句叫状语从句。
可分为，时间状语从句，地点状语从句，原因，目的，结果，条件，让步，比较和方式状语从句。
2. 时间状语从句起时间状语作用的句子；可放在句首，句中和句尾常用引导词：when，while, as, after, before, since, till, until, the moment, hardly … when , no sooner … thanwhen, while, as的用法1) when 用法最广，常可代替while和as, 在while 引导的从句中，动词只能是延续性的When the fire broke out, all the students were sleeping soundly.The telephone rang while I was taking a bath.2) 当两个表示时间延续的动作同时发生而又有对比意味的时候，用while，在这样的复合句中，主句从句的时态通常是相同的。
Father was preparing a report while I was playing PC games.3) 常用as的情况：一边…一边；表示随着短暂动作的发生，另一行为伴随发生As he talked on, he got more and more excited.They talked as they walked along the river.My cap was blown away as I sat down.until和till的用法表示“一直到…”时，主句和从句都用肯定式；I will wait until/ till the concert is over.表示“直到…才…”是，主句用否定，从句用肯定式。
They can’t go until Sunday.since的用法He has written to me frequently since he was ill. 自从他病好以来，他常写信给我。
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状语从句状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。
一、时间状语从句引导时间状语从句的连词有：when, as, while, until, not…until, before, after, since, the minute, the moment, each( every, next, the first) time等。
时间状语从句中一般用一般现在时或一般过去时。
1．When , while, as都可解释为“当```的时候”但侧重点有所不同。
1)W henEg: When I arrived home , I had a little rest.注意点：when 从句的主语与主句主语相同，谓语动词是be 动词时，从句主语和be可以省略。
Eg: When (she was) walking along the street, she met her class teacher.2)A sAs 除了表示“当```的时候”，还可表示为“一面```一面”，“随着”Eg: He sang as he danced.(一面```一面) You will grow wiser as you grow older.(随着)3)W hile表示“当```的时候”强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。
Eg: While we were working, they were having a rest.While (they were) having a discussion, they got very confused.注意点：while 有对比的含义，解释为“然而”。
eg: I prefer black tee, while he likes coffee.2．until, not…until表示“直到```才”,在肯定句中主句常用延续性动词；在否定句中主句常用短暂性动词。
肯定句：I waited until midnight.否定句：I did not leave until midnight.注意点：1）not until…在句首，主句用倒装eg: Not until you had explained how didI manage to do it.2) It is not until…that…引导的强调句It was not until it was dark that he came back.3. the minute, the moment, each time都可表示“一```就```”eg: The worker recognized the type of the machine the moment he saw it.注意点：the minute, the moment, each ( every, next, the first) time作连词不和when 连用。
4．Hardly/scarcely…when, no sooner…than, as soon as表示为“一```就```”eg: I had hardly/scarcely got home when it began to rain.I had no sooner got home than it began to rain.It began to rain as soon as I got home.注意点：Hardly/scarcely…when, no sooner…than位于句首，主句用倒装eg: Had I hardly/scarcely got home when it began to rain.No sooner had I got home than it began to rain.二条件状语从句条件状语从句分为两大类：真实条件句和虚拟条件句。
引导条件状语从句的连词有：if, even if/though, unless/ if …not, as long as/ so long as, as far as/so far as, provided/providing (that), on condition that 等。
条件状语从句中如果主句是将来时，条件状语从句用一般现在时。
1.unless 和if…notunless 相当于if…noteg: You will fail unless you study hard.You will not fail if you study hard.注意点：在虚拟条件句中可用if…not，但不能用unlesseg: If she were not too silly,she wouldunderstand.2．引导条件状语从句的其它连词：Eg: You may go there ,as long as you keep quite.Eg: I shall give you the book on condition that you return it tomorrow.Eg: I will go provided that you go too.三让步状语从句引导让步状语从句的连词有：though, although, even if/ though, however, no matter how, no matter what, no matter who 等。
1．though, although不可与but连用，但可以和yet , still连用.Eg: Though/Although it is raining ,they are still running outside.注意点：1）though可引导倒装(although不引导倒装)，结构为：强调对象+as/though+主语+其它成分，强调对象可为表语（名词、形容词）或状语（副词），表语为名词时，前面不用冠词。
Child as/ though he was, he knew what was the right thing to do.Tired as he is, he goes on with his work. 2）despite 和in spite of 也有让步意义，后接名词或动词，而though, although是连词，后接从句。
Eg: Despite /In spite of wanting to see him again, she refused to reply to his letter.Though/although she wanted to see him again, she refused to reply to his letter.2. “no matter+疑问词”或“疑问词+后缀ever”eg: No matter what happened, he would not mind.Whatever happened, he would not mind.注意点：no matter+疑问词不能引导名词性从句3.even if/ though表示“即使”eg: He doesn’t want to marry her even if/ though he loves her very much.四原因状语从句引导原因状语从句的连词有：because, since, as , now that ,considering that, for the reason that , due to the fact that,owing to the fact that等1．becausebecause语气最强，通常用于回答why 提出的问题注意点：在it was…that…的强调结构中，强调原因状语从句可用because引导，不用since,as, for引导。
Eg: It is because she is too inexperienced that she does not know how to deal with the situation.2. since和assince的语气比because 弱，比as强，表示间接的，已知的原因，自然的结果，表示“既然，由于”。
Eg: As/ Since you are not very well, you had better have a rest.3．for当for表示原因关系时，for分句是对第一分句内容的推断或猜测。
Eg: It must have rained last night, for the ground is wet now.五目的状语从句引导目的状语从句的连词有：so that, in order that, lest, in case, for fear that等。
Eg: You must speak louder so that/in order that you can be heard by all.He wrote the name down for fear that he should forget it.Better take more clothes in case the weather is cold.注意点：lest, in case, for fear that所引导的状语从句中，动词可以用虚拟语气，形式为should+动词原形，也可不用虚拟语气，用动词的一般现在时或一般过去时。
Eg: You had better leave the key at home in case one of us should think of/thinks of coming back.六结果状语从句引导结果状语从句的连词有：so that, so…that, such…that等eg: He is so young that he can not go to school.He is such a young boy that he can not go to school.1．常用句型：so+形容词/副词+that从句so+形容词+a/an+单数可数名词+that从句such +a/an+形容词+单数可数名词+that 从句such +形容词+复数可数名词/不可数名词+that从句2．so和such的搭配规律such修饰名词或名词词组，so修饰形容词或副词,so还可接many, few, much, little等。
Eg: so foolish such a fool so nice a flower such a nice flowerso many/few flowers such niceflowersso much/little money such rapid progressso many people such a lot of people七比较状语从句引导比较状语从句的连词有：as…as, than, not so…as, the more…the more等如：He speaks English as fluently as his brother (does)I can’t jump so /as high as he (does) There are more workers in this factory than in the one next to it .The more you read, the more interesting , you will find the novel is .连接词than 可作为关系代词用。