时间地点原因状语从句
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状语从句的种类连词时态状语从句是指用来修饰主句的从句,它可以表示时间、地点、原因、条件、方式、目的等。
在状语从句中,连词的选择和时态的运用非常重要,下面就让我们来详细了解一下状语从句的种类、连词和时态。
一、时间状语从句时间状语从句是表示时间关系的从句,用来修饰主句中的时间概念。
时间状语从句的常用的连词有when,while,before,after,as soon as,until,since,等等。
这些连词所引导的时间状语从句的谓语动词的时态要根据主句的时态而定。
1. 当主句是一般现在时,时间状语从句的谓语动词的时态为一般过去时。
例如:When I was young, I used to play tennis.As soon as he finished his homework, he went to bed.2. 当主句是一般过去时,时间状语从句的谓语动词的时态为过去完成时。
例如:I had finished my homework before I watched TV.After I had dinner, I went to bed.3. 当主句是将来时,时间状语从句的谓语动词的时态为一般现在时或将来时。
例如:I will call you as soon as I arrive in Shanghai.He will stay in New York until he finds a job.二、地点状语从句地点状语从句是表示地点关系的从句,用来修饰主句中的地点概念。
地点状语从句的常用的连词有where,wherever,等等。
这些连词所引导的地点状语从句的谓语动词的时态一般和主句保持一致。
例如:I will meet you where we agreed.Wherever you go, I will follow you.三、原因状语从句原因状语从句是表示原因关系的从句,用来修饰主句中的原因概念。
状语从句知识点详解(初中英语专项复习)状语从句的概念: 用一个句子作状语来修饰动词和形容词,以表明动作发生或状态存在的时间、地点、原因等,这个句子就叫做状语从句。
状语从句的分类:状语从句共分为九大类,包括:时间、地点、原因、条件、让步、目的、结果、方式、比较状语从句。
下面分别讲解:一、时间状语从句概念:用来表示时间的状语从句,由when, while, as, till, until,before, after, since等引导。
由于时间状语从句的引导词所表示的意思并非一致,不同引导词表达不同的时间,它们在句子中对应的时态、语态等也有所不同。
例如:when /while引导的时间状语从句when引导的从句的谓语动词通常是瞬间动词,也可以是延续性动词。
从句动作可与主语动作通常先后发生也可同时发生。
I was writing when my sister came back.( come是瞬间动词,只能用when引导,不能用while)He often wrote me when/while he studied in Shanghai International Studies University.( study 是延续性动词,while可代替when)While my mother was cooking , I was playing chess with dad. (cook是延续性的动词,cook和play同时发生)I like playing chess while my sister likes reading stories.我喜欢下棋,而我姐姐喜欢看小说。
(while表示对比)when和while的区别还有:while引导的时间状语从句多用于进行时态,而when引导的时间状语从句多用于一般时态。
While we were playing games, our headmaster called me .我们正在做游戏的时候,校长叫我了。
十大状语从句类型
十大状语从句类型:
1. 时间状语从句
当我们谈到时间时,常常使用时间状语从句来表达具体的时间点或时间段。
例如:当我到达学校时,已经下午三点了。
2. 原因状语从句
我们常常使用原因状语从句来解释一个事件或行为的原因。
例如:我没去参加聚会,是因为我生病了。
3. 条件状语从句
条件状语从句常常用来表达一个条件对结果的影响。
例如:如果明天下雨,我们就不出去玩了。
4. 目的状语从句
目的状语从句用来说明一个行为或动作的目的。
例如:我学习英语,是为了能够和外国人交流。
5. 结果状语从句
结果状语从句用来说明某个行动或情况所导致的结果。
例如:她很努力学习,结果考试取得了好成绩。
6. 让步状语从句
让步状语从句用来表示一个与主句相反的情况或条件。
例如:尽管
下雨了,但他还是出去跑步了。
7. 比较状语从句
比较状语从句用来表示两个或多个事物之间的比较。
例如:他比我更高大。
8. 方式状语从句
方式状语从句用来说明某个行动或动作的方式。
例如:他悄悄地走进房间。
9. 地点状语从句
地点状语从句用来说明某个行动或动作发生的地点。
例如:我们在公园里见面。
10. 比较状语从句
比较状语从句用来表示两个或多个事物之间的比较。
例如:她比我更聪明。
这是十大常见的状语从句类型,通过使用不同类型的状语从句,我们可以更加准确地表达我们的意思,使语言更加丰富多样。
同时,了解这些状语从句的用法也能够帮助我们更好地理解和使用复杂句子。
状语从句本质——用不同的连接词将主句与一个或几个分句连接起来,以表达主句与分句之间的逻辑关系。
主句分句连接词逻辑关系时间、地点、原因、目的、结果、条件、让步、比较、方式时间状语从句用来说明主句动作与从句动作发生时间上的先后关系类型常用连接词特殊连接词重点时间状语从句when, while, as, before,after, since, till, until,as soon as 名词:the moment, theinstant, the minute, theday, next time, everytime副词:instantly,immediately, directly 连词:no sooner …than,Hardly…when, scarcely …when 主句从句的时态搭配,延续性动词与非延续性动词的区别1. when 引导的时间状语从句可以理解为“当……的时候”时态搭配主从句都是过去时态主从句都用现在时态主句将来时态从句现在时态辨析The performer will already have played the music when we get there.The performer will be playing the music when we get there.是否可以用while 来替换?It is challenging for a company to remain inter-nationally competitive while the global economics are receding.※when, while, as 用法的区别when 相当于at that time ,引导的状语从句中谓语动词可以是延续性的也可以是非延续性的while ,as 相当于during that time, 引导的状语从句中谓语动词通常是延续性的随着英特网变得日益商业化,网络的使用对商人们非常有利。
英语九大状语从句:1.时间状语从句(Time adverbial clause):指定一个时间点或时间段。
例如:I will call you when I get home.(我回家后会给你打电话。
)2.地点状语从句(Place adverbial clause):指定一个地点或位置。
例如:She looked for her keys where she last saw them.(她在上次看到它们的地方找钥匙。
)3.原因状语从句(Reason adverbial clause):提供一个原因或解释。
例如:She didn't come to the party because she was feeling sick.(她因为感觉不舒服所以没有来参加派对。
)4.结果状语从句(Result adverbial clause):表达一个结果或效果。
例如:He studied hard, so he passed the exam.(他努力学习,所以考试通过了。
)5.条件状语从句(Conditional adverbial clause):表示一个条件。
例如:If it rains tomorrow, we will stay indoors.(如果明天下雨,我们会呆在室内。
)6.比较状语从句(Comparison adverbial clause):进行比较。
例如:He sings better than anyone else I know.(他唱得比我认识的任何人都好。
)7.目的状语从句(Purpose adverbial clause):表示一个目的或意图。
例如:I bought groceries so that I can cook dinner.(我买了杂货,这样我就能做晚饭了。
)8.方式状语从句(Manner adverbial clause):描述一个行为或方式。
例如:She speaks as if she knows everything.(她说话的样子好像她什么都知道。
状语从句用法详解状语从句是英语语法中重要的句子成分,用于修饰句子中的动态或状态,告诉我们动作发生的时间、地点、原因、方式等相关信息。
本文将详细介绍状语从句的用法。
1. 时间状语从句:时间状语从句用于表示动作发生的时间关系。
常见的引导词有when,while,before,after,since等。
例如:- I will meet her when I finish work.(我下班后会和她见面。
)- We were having dinner while it started to rain.(我们正在吃饭时突然下雨了。
)2. 地点状语从句:地点状语从句用于表示动作发生的地点关系。
常见的引导词有where,wherever等。
例如:- I will go wherever you go.(无论你去哪,我都会跟着去。
)- She can find her keys where she left them.(她可以在她放钥匙的地方找到它们。
)3. 原因状语从句:原因状语从句用于表示某个动作或状态的原因。
常见的引导词有because,since,as等。
例如:- As it was getting late, we decided to leave.(由于时间很晚,我们决定离开。
)4. 方式状语从句:方式状语从句用于表示某个动作或状态的方式。
常见的引导词有as,like,as if等。
例如:- She danced as if nobody was watching.(她像没人看着一样跳舞。
)- He treats me like a princess.(他像对待公主一样对待我。
)需要注意的是,在使用状语从句时,需要注意主句和从句之间的时态和语序的一致性。
此外,状语从句通常位于主句之前或之后,但也可以放在主句的中间。
总结:状语从句是用于修饰句子中动态或状态的从句,用于表示时间、地点、原因、方式等相关信息。
状语从句在复合句中作状语的从句叫状语从句。
状语从句有时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。
一、时间状语从句引导时间状语从句的连接词有:when,as,while,after,before,since,eversince,assoonas, once,till,until,whenever,nosooner⋯than,hardly/scarcely...when,themoment/minute/in stant/second,everytime,eachtime,anytime,thefirsttime,nexttime,lasttime,allthetime ,bythetime,directly,immediately,instantly等。
1.表示“一··就···”的句型1)assoonas/onceAssoonashearrives,I'llcallyou.他一到,我就给你打电话。
(assoonas侧重时间或动作先后衔接紧,而once侧重条件,表示“一旦...)”2)ondoingsth/onone's+n作.时间状语Onarrivingatthestation,thethiefwasarrested.一到达车站,这个小偷就被逮捕了。
OnhisarrivalinParis,hewasrecognizedasanobleandthrownintoprison他.一到达巴黎,就被认出是一个贵族,并被投入监狱。
3)nosooner...than,hardly/scarcely...when它们表“一,就”。
结构中的否定词放在句首时,主句要倒装。
(主句都用过去完成时,从句用一般过去时。
)Nosoonerhadhereachedhomethanitbegantorain.他刚到家,天就开始下雨了。
Hardly/ScarcelyhadIenteredtheroomwhenthephonerang.我一进屋,电话就响了。
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。
状语从句用法总结状语从句是指在复合句中充当状语的从句。
它可以修饰谓语动词、形容词、副词、介词等,为主句表达更加准确、丰富和生动的意义。
下面是状语从句的用法总结。
1. 时间状语从句时间状语从句表示时间的划分、顺序或先后关系,一般由when, while, as, before, after, since, till, until, as soon as, the moment等引导。
例如:She had breakfast before she went to work. (她上班之前吃了早饭。
)地点状语从句表示事情发生的地点,一般由where, wherever等引导。
例如:I will go wherever you go. (无论你去哪里,我都会跟着你去。
)原因状语从句表示主句发生的原因,一般由because, since, as, for等引导。
例如:I took an umbrella with me so that I wouldn't get wet. (我带了一把伞,以免淋湿。
)比较状语从句表示主句和从句中两个被比较的事物之间的关系,一般由as...as,than等引导。
例如:She is as tall as her sister. (她和她姐姐一样高。
)方式状语从句表示主句中的动作或状态如何进行或实现,一般由as, the way等引导。
让步状语从句表示尽管有某种反对因素,但主语还是发生了从句中表示的动作或状态,一般由although, though, even though, despite the fact that等引导。
状语从句在句子中起着很重要的作用,能够使语言表达更丰富、更准确。
当我们对各种状语从句的用法都掌握清楚后,就可以更好地运用它们来表达自己的意思。
状语从句是英语语法中的重要组成部分,它可以让我们表达更加复杂的语义,增强我们语言表达的准确性和精度。
状语从句可以从不同的角度来划分,如时间、地点、原因、条件、结果、比较、方式、目的和让步等,下面我们逐一梳理一下。
9大状语从句用于增强语气和表达情感在英语语法中,状语从句是指用来修饰主句的复合句。
它可以起到修饰时间、地点、原因、条件、目的等各种作用。
状语从句的存在可以丰富语言表达,增强语气,表达情感而不单单是为了传达信息。
本文将探讨9种常见的状语从句,在日常写作和口语交流中的使用方法和意义。
1. 时间状语从句时间状语从句是用来描述主句和另一个时间点之间的关系。
常用的连接词有when, while, as, since, before, after, until等。
例如:- When I was young, I used to play the piano every day.- After I finish my work, I will go to the gym.时间状语从句可以用来强调时间关系,同时也可以让语言更加生动有趣。
另外,在写作和演讲中,恰当的使用时间状语从句可以帮助读者或听众更好地了解事件的发展情况。
2. 地点状语从句地点状语从句是用来描述主句和另一个地点之间的关系。
常见的连接词有where, wherever, anywhere等。
例如:- I will go wherever you go.- She looked everywhere for her missing cat.地点状语从句可以用来准确描述地点,增强表情。
尤其在描述旅游、故事或传记等方面,地点状语从句经常被使用.3. 原因状语从句原因状语从句是用来描述主句和某个原因之间的关系。
常见的连接词有because, since, as, for等。
例如:- Because it was raining, I stayed at home last night.- I don't like to eat fish, for I am allergic to it.原因状语从句可以强调某个事件的原因,增强语气。
通过使用原因状语从句,写作者或者说话人可以清晰地表达某个事情的原因,使文章更加步入事实,增强可信程度。
完整版)状语从句(9种全)状语从句在复合句中起到修饰主句的作用,分为时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。
1.时间状语从句时间状语从句的连接词包括when。
as。
while。
after。
before。
since。
ever since。
as soon as。
once。
till。
until。
whenever。
no sooner…than。
hardly/scarcely。
when。
the moment/minute/instant/second。
every time。
each time。
any time。
the first time。
next time。
last time。
all the time。
by the time。
directly。
immediately。
instantly等。
例如,“一···就···”的句型可以用as soon as或once引导,其中as soon as侧重时间或动作先后衔接紧,而once侧重条件,表示“一旦。
”;on doing sth/on one's + n.作时间状语,例如On arriving at the n。
the thief was arrested.意为“一到达车站,这个小偷就被逮捕了。
”2.地点状语从句地点状语从句的连接词包括where。
wherever。
anywhere。
everywhere等。
例如,I'll go wherever you go.意为“你去哪儿,我就跟你去哪儿。
”3.原因状语从句原因状语从句的连接词包括because。
since。
as。
now that。
seeing that。
considering that等。
例如,Since it's raining。
we'll stay indoors.意为“因为下雨,我们将待在室内。
状语从句的类型了解时间地点原因条件和方式状语从句状语从句是一个句子中充当状语的从句,用来修饰其他句子中的动词、形容词或副词。
其中,状语从句又可分为时间状语从句、地点状语从句、原因状语从句、条件状语从句和方式状语从句。
本文将详细介绍这五种状语从句的类型、用法和示例。
一、时间状语从句时间状语从句是指用来表示时间关系的从句,常用的引导词包括when、while、before、after、as soon as等。
它们可以说明一个动作发生的时间、顺序或同时性。
示例1:When I was young, I used to play in the park every day.当我年轻的时候,我每天都在公园里玩耍。
示例2:After I finish this article, I will start working on my presentation.在我完成这篇文章之后,我将开始着手准备我的演讲稿。
二、地点状语从句地点状语从句用来表示动作发生的地点或方位,常用的引导词包括where、wherever等。
示例:Wherever you go, I will always be with you.无论你去哪里,我都会始终陪伴在你身边。
三、原因状语从句原因状语从句用来说明一个动作或事件的原因,常用的引导词有because、since、as等。
示例:He couldn't attend the meeting because he was sick.他因为生病无法参加会议。
四、条件状语从句条件状语从句用来表示某个条件下发生的动作,常用的引导词有if、unless、as long as等。
示例:If it rains tomorrow, we will stay at home.如果明天下雨,我们将呆在家里。
五、方式状语从句方式状语从句用来说明动作或事件的方式或方法,常用的引导词有as、as if、as though等。
状语从句的时间原因条件等用法详解状语从句的时间、原因、条件等用法详解状语从句是复合句中的一种从属从句,用来修饰并限定主句,提供时间、原因、条件等信息。
掌握状语从句的用法,能够让我们的表达更加准确、流畅。
本文将详细解析状语从句的时间、原因、条件等用法。
一、时间状语从句时间状语从句用来描述动作或事件发生的时间。
常见的时间状语从句引导词有:when(当...的时候)、while(当...的时候)、as(当...的时候)、before(在...之前)、after(在...之后)等。
例如:1. I will call you when I arrive home.(我到家时会给你打电话。
)2. He fell asleep as the movie started.(电影刚开始他就睡着了。
)3. Before I leave, I need to finish my work.(在我离开之前,我需要完成我的工作。
)二、原因状语从句原因状语从句用来解释主句中的原因。
常见的原因状语从句引导词有:because(因为)、since(既然)、as(由于)、for(因为)等。
例如:1. He couldn't attend the meeting because he was sick.(他因为生病无法参加会议。
)2. Since you are not feeling well, you should rest at home.(既然你感觉不舒服,你应该在家休息。
)3. I didn't take the job as it didn't meet my requirements.(我没有接受这份工作,因为它不符合我的要求。
)三、条件状语从句条件状语从句用来表达某种条件下发生的情况。
常见的条件状语从句引导词有:if(如果)、unless(除非)、provided that(倘若)、as long as(只要)等。
状语从句的种类(九种)口诀:▪时地原因条状补,▪目比结果方让步,▪连词引导各不同;▪主句通常前面走,▪连词引导紧随后,▪从句若在主前头,▪主从之间有个逗。
用来修饰谓语动词、其它动词、定语、状语或整个句子的从句叫做状语从句。
状语从句可分为:1.时间状语从句;(adverbial clause of time)2.地点状语从句;(adverbial clause of place)3.原因状语从句;(adverbial clause of cause)4.条件状语从句;(adverbial clause of condition)5.目的状语从句;(adverbial clause of purpose)6.让步状语从句;(adverbial clause of concession)7.比较状语从句;(adverbial clause of comparison)8.方式状语从句;(adverbial clause of manner)9.结果状语从句。
(adverbial clause of result)§状语从句的时态特点一般情况下,时间和条件状语从句的谓语动词一般用“一般现在时”表示“一般将来时”,用“现在完成时”表示“将来完成时”。
例如:1.时间状语从句;(adverbial clause of time)①由when, while, as引导的时间状语从句。
例如:When we got home, I find Tom.While my wife was reading the newspaper, I was watching TV.We always sing as we walk.我们总是边走边唱。
②由before和after引导的时间状语从句。
It will be four days before they come back. 他们要过四天才能回来。
After you think it over, please let me know what you decide.你仔细考虑过以后,告诉我你是怎样决定的。
状语从句的9种形式状语从句是一种在句子中作状语的从句,它有9种形式:时间、地点、原因、条件、方式、让步、结果、比较和目的。
一、时间状语从句时间状语从句用来表示句子发生的时间,一般要用when或while引导:When I was a child, I used to play with my friends every day. 我小时候每天都和朋友玩耍。
While I was studying in the library, someone stole my bag. 我在图书馆学习时,有人偷了我的书包。
注意:在某些情况下,when和while可以互换使用,但不能混用。
二、地点状语从句地点状语从句表示句子发生的地点,一般要用where 引导:Where there is a will, there is a way. 有志者事竟成。
He lives where he works. 他住在他工作的地方。
三、原因状语从句原因状语从句表示句子发生的原因,一般要用why或because引导:Why she is late? 她为什么迟到?Because it was raining heavily, I couldn't get to school on time. 因为下着大雨,我上不了学。
四、条件状语从句条件状语从句表示句子发生的条件,一般要用if或unless引导:If you study hard, you'll pass the exam. 如果你努力学习,你就能通过考试。
Unless you work harder, you won't get better grades. 除非你更努力工作,否则你的分数不会提高。
五、方式状语从句方式状语从句表示句子的发生方式,一般要用as或how引导:As I said before, I'll help you with your project. 就像我之前说的,我会帮助你完成这个项目。
状语从句的时间地点和原因解析状语从句的时间、地点和原因解析状语从句是复合句中的一种从属性句子,用来修饰主句的时间、地点和原因等方面。
它在句子中起到了补充说明的作用,使整个句子更加丰富和准确。
本文将对状语从句的时间、地点和原因进行详细的解析。
一、状语从句的时间解析状语从句的时间状语用来表达动作发生的时间。
它可以在主句之前、之后或者与主句同时进行。
以下是一些常见的时间状语从句的引导词和用法:1. 当(引导时间点或条件)当我到达学校的时候,他已经离开了。
当地震发生时,人们立即逃离了家园。
2. 一……就(表示前后关系)一到放学,我就开始做作业了。
一觉醒来,他就发现自己在医院里。
3. 在……之前/之后(表示时间先后)在我搬家之前,请帮我照顾好我的猫。
在他离开之后,我们才敢开口说话。
二、状语从句的地点解析状语从句的地点状语用来说明动作发生的地点。
它可以告诉读者主句中的动作在哪里进行。
以下是一些常见的地点状语从句的引导词和用法:1. 在……的地方在我家附近有一家很好吃的餐馆。
在那个广场的角落里,有一个巨大的雕塑。
2. 到……地为止她一直走到学校的大门口才停下来。
他一直跑到山顶才休息下来。
3. 无论……都无论身在何处,他都会想念家乡的味道。
无论我走到哪里,我都会想起你的微笑。
三、状语从句的原因解析状语从句的原因状语用来解释主句的原因或理由。
它可以表达出动作发生的原因,让读者更加明了主句的目的。
以下是一些常见的原因状语从句的引导词和用法:1. 因为(强调原因)我没有去参加聚会,因为我生病了。
我没有见到他,因为他已经离开了。
2. 由于(指出原因)由于天气原因,比赛被取消了。
由于交通堵塞,他迟到了一小时。
3. 既然(表示已知情况)既然你不喜欢这本书,为什么还要买下来呢?既然你已经做了决定,我就不再多说了。
总结:状语从句的时间、地点和原因在句子中起到了重要的修饰作用。
通过时间状语从句,人们可以清楚地了解到动作发生的时间点;通过地点状语从句,人们可以明确地知道动作发生的地点;通过原因状语从句,人们可以了解到动作发生的原因。
状语从句的位置和作用解析与实例状语从句是汉语中常见的从句结构,它通过修饰句子的主语、谓语、宾语或其他成分来表达时间、地点、原因、条件、目的等各种状况。
正确的使用状语从句不仅可以使句子更加丰富多样,而且可以增强语言的表达力和逻辑性。
本文将对状语从句的位置和作用进行解析,并给出一些实例,帮助读者更好地理解和运用状语从句。
一、状语从句的位置1. 状语从句可以位于主句之前,也可以位于主句之后。
当状语从句位于主句之前时,常常使用逗号将状语从句和主句隔开。
例如:无论你走到哪里,我都会陪伴在你身边。
不管他怎么解释,我都不相信他的借口。
2. 状语从句可以位于主句中间,其中较常见的位置是将状语从句放在主句的谓语动词之后。
这样的结构可以使句子更加紧凑,表达更为灵活。
例如:我会在告诉你我爱你之前,先问问你愿意不愿意嫁给我。
她洗完澡后,才意识到手机还放在浴室里。
3. 状语从句还可以位于句首或句尾,但这种结构较为固定,一般用于特殊的句式或表达方式。
例如:每当夜幕降临,我就感到一种莫名的孤独。
他是个善于思考的人,然而,这并不意味着他是个聪明的人。
二、状语从句的作用1. 时间状语从句:用来修饰主句中动作发生的时间。
例如:当我们看到那只流浪狗时,大家的眼泪都止不住。
她来中国的时候,正值中国的春节。
2. 地点状语从句:用来修饰主句中动作发生的地点。
例如:无论你走到哪里,我都会陪伴在你身边。
他在哪里工作都无所谓,只要能赚到足够的钱。
3. 原因状语从句:用来解释主句中动作的原因。
例如:我不喜欢他,是因为他总是对我撒谎。
既然你不喜欢这个餐厅的菜,我们就换一个地方吃吧。
4. 条件状语从句:用来表示主句动作发生的前提条件。
例如:如果你愿意,我们可以一起去看电影。
只要你肯努力,就一定会取得好成绩。
5. 目的状语从句:用来表示主句动作的目的或意图。
例如:我学习英语是为了能和外国人交流。
他奋斗的目标是为了给家人一个更好的生活。
三、状语从句的实例1. 时间状语从句:当他听到好消息时,高兴得跳了起来。
9种状语从句标题:了解九种常见的状语从句状语从句是语法中的一种重要结构,用于描述或修饰主句中的动作、时间、原因、条件等。
下面将介绍九种常见的状语从句。
1.时间状语从句:当我们需要描述一个动作发生的时间时,可以使用时间状语从句。
例如,“我会在你回来之前完成作业。
”2.原因状语从句:原因状语从句用于解释主句中的原因或理由。
例如,“由于下雨,他没有去上学。
”3.条件状语从句:条件状语从句描述了主句中的动作发生的前提条件。
例如,“如果你明天来,我们可以一起去看电影。
”4.方式状语从句:当我们需要描述一个动作或事件的方式时,可以使用方式状语从句。
例如,“他唱歌的方式让人感动。
”5.地点状语从句:地点状语从句用于描述主句中的动作发生的地点。
例如,“我在哪儿等你,你就来哪儿。
”6.目的状语从句:目的状语从句解释了主句中的动作的目的或意图。
例如,“我去超市买东西,是为了准备晚餐。
”7.结果状语从句:结果状语从句用于描述主句中的动作的结果或后果。
例如,“他学习努力,所以考试取得了好成绩。
”8.让步状语从句:让步状语从句用于表达与主句中的动作相反的情况。
例如,“尽管下雨了,但他还是去跑步了。
”9.比较状语从句:比较状语从句用于进行比较。
例如,“她比我更聪明。
”以上是九种常见的状语从句,每一种都有不同的用法和功能。
在写作中,熟练掌握这些状语从句的用法,可以丰富句子的表达方式,使文章更加清晰和有逻辑。
总结一下,文章介绍了九种常见的状语从句,包括时间、原因、条件、方式、地点、目的、结果、让步和比较状语从句。
正确使用这些状语从句可以使文章更加流畅和表达更加准确。
状语从句的讲解就是用一句话作状语分为:时间,地点,方式,原因,结果,条件,让步,目的,比较一、时间状语从句第一次见到你一见到你我就喜欢上了你直到见到你五岁时见到你When, as, while, before, after, since, till/until, as soon as no sooner …than …scarcely …where- hardly …when… the minute the second the in sta nt the mome nt by the time 截止immediately in sta ntly directlyeach time every time next time the first time on doing sth whe nwhile 当…时as2)这时/3)届时、到时I was watch ing TV whe n my cellpho ne sudde nly rang 这时When I was five years old I could speak five IanguagesThe wet weather will continue tommorow when a cold front is expected to arrive届时到时注意:时间状语从句中动作发生有前后时先发生的用过去完成时Whe n my mother came back I had already gone to bed.2. while 1 )从句动词延续性2 )同时发生3)对比的意味“然而”4)趁着He taught himself while he worked in a ba nk 延续性动词当他在银行上班时While we were work ing they were havi ng a rest. 对比While they were hav ing a discussi on , they got very con fused.I want the girls to experience that while they are young同时趁着她们还年轻我想让姑娘们体验一下对比:I prefer black tea, while he likes coffee3.As 1)当…时2)—边...一边3)随着As the childre n walked along the street, they sang happily. 当孩子们He sang as he danced —边一边You will grow wiser as you grow older 随着2 )前加一段时间直到…才…3)还没来得及4)要过…时间才I ' II be back before you leaveIt may be many years before we meet aga in 可能要过很多年我们才能见面The stude nts rushed outside before I could fini shed my word 还没等我讲完It will be three weeks before he fini shed his workIt won ' t be long before he finished his work. 用不了多久5.afterAfter my friend got married, she went to live in America6.since 自从主句一般为现在完成时we ve never met since we graduated from the collegeGreat cha nges have take n place since you left否定句中只用not…until…直到…才Not un til 放句首句子部分倒装(倒装主句)Don ald will rema in in college un til/till he fini shed his PhD courseDonald won ' t leave college until he finished his PhD courseI won ' t go with you until I finished my homeworkNot un til my mother came back did I go to bed8.as soon asI gave the alarm as soon as I saw the smoke. 一看见冒烟就发出警报He will be set free as soon as the fine is paid9.the minuteThe sec ondThe in sta nt 瞬间片刻立即的立刻的素食的The mome ntThe min ute we got home, the teleph one rang10. no sooner …than…Scarcely …when•…Hardly …whe n …I had no sooner got home tha n it bega n to rain.The fans had hardly seen the movie star when they criedThe fans had scarcely see n the movie star when they cried注意:他们提前句子部分倒装No sooner had I got home tha n it bega n to rain.Hardly had I got home whe n it bega n to rainScarcely had the fans see n the movie star whe n they cried11.名词引导的时间状语从句The first time I saw you I mistook you for a film starNext time I see you I will tell you the truthEvery time/each time I see this picture I thi nk of my hometow n.12.On+ doi ng —…就…On arriv ing home, he discovered they had gone —至U家发现他们已经走了13.immediately instantly directlyImmediately she had gon e, I remembered her n ame. 她刚走开我就想起了她的名字14.by the time 1) 从句是一般现在时主句用将来完成时2 )从句是一般过去时主句用过去完成时By the time you receive this letter, I will have left this cityI shall have fi nished it by the time you come back 你回来以前我就做完了By the time I got there, the bus had already left.注意:as soon as after before 常与过去完成时连用After I had fini shed my homework I went to sleepBefore I went to sleep I had fini shed my homeworkAs soon as I had fini shed my homework I went ot sleep.但是如果不强调时间的先后都可以用一般过去时After I fini shed my homework I went to sleep/二、地点状语从句一、Where在…地方wherever 无论哪里any where 任何地方everywhere到处1.whereYou should put the book where you found itWe must camp where we can find waterYou had better make a mark where you have any questi ons.2.whereverwherever there is smoke, there is fireplease put the cup wherever that is convinient3. a ny whereYou can put it any where you likeI can ' t stay any where there are a lot of people4.everywhereEverywhere I go, I find the same thi ng. 去到的每一处都看到同样的情况I have searched everywhere there is a clueBamboo grows best where it is warm and where it rains ofte n.Go back where you came fromGo back to the place where you came2.where引导的状从可放在句首与句末都可而where引导的定语从句只放在句末三、练习1.he advised me to live __________ the air is fresherA. i n whereB.in whichC. the place whereD. where2.in peace too, the Red Cross is expected to send help _______________ there is huma nsufferi ngA. whoeverB.howeverC. whateverD.whereveras the Roma ns doA. in whichB. whatC. whe nD. where三、原因状语从句Because since for as now that in that because of 既然鉴于in as muchas既然鉴于in so far as鉴于考虑至U considering that seeing that given thatFor the reason that 由于…原因due to the fact that 由于…事实owing to thefact that〔.because 1 )语气最强常放句末2 )回答why的问句3) 强调句I missed the train because I got up late.He is disappo in ted because he failed aga inBecause he failed aga in so he is disappo in ted 错不能出现so注意;because 前可以加程度副词simply because just merely mainly It is because she is too in experie need that she does not know how to deal with the situatio n2.s ince 语气弱一些表示对方已知的已经存在的原因“既然”常常放句首Since you are not interested, I won ' t tell you about itSince no one is aga inst it, we will pass it 通过了As you request it , I will come4.for 1) 表示猜测的原因放句末用逗号隔开2) 多用于书面语不表示直接原因对前面的句子附带说明It must have rained last ni ght, for the gro und is wetI went to see him, for I had someth ing to tell him.I want to be an engineer,for it ' s my dream5.now that 既然=since表示新出现的情况促成某事的发生放句首居多已经有的情况目前的状况Steven, I heard that the flight ticket to America is cheap recently . Now that youhave time, whynot we go there together.Now that we can ' t change the fact, let ' s accept it.6.in that仅因为就因为有限制意味多用于否定中Someold people only remember happy things in that they can' t get used to this fast societyI don ' t like sports in that I am good at it7.in as much as in so far as 既然鉴于In so far as it is not my fault, I donIn as much as the debtor has no property, I aba ndon my claim8. co nsideri ng that考虑到鉴于补充说明She knows quite a lot about it, considering (that) she is very young. Considering that she is just a child, I am not very strict with her 9. seeing that由于 因为 鉴于已有情况Seeing that he ' s been sick all week, he is unlikely to come today. Seeing that you live n ext door to Mr Black, you should recog nize her.Due to the fact that Owi ng to the fact thatI left that country due to the fact that I can' t accept its cultureFor the reas on that Owi ng to the fact that11. given that 由于 鉴于Given that you are new here, I will show you around.四、条件状语从句一、If uniess=ifnot if only as long as = so long as onconditionin case 假如以防万一provided (that) = provid ing (that) suppose (that) = suppos ing (that) once 1. if 如果1 )真实条件句2)非真实条件句(虚拟语气) If it doesn' t rain we will go climbingIf you have any questi on, you can voice them now.可以提出来主将从先主情从现If I were a bird, I would fly 2. unl ess=if notYou will be late, uni ess you hurry= You' ll be late, if you don ' t hurryIf you don ' t visit him tomorrow, he will be an gry= Un less you visit him tomorrow he ' ll be angry I won ' t forgive you uni ess you apologize= I won ' t forgive you, If you donapologize3.if only 只要如果 要是…就好了I ' ll let you use my car, if only you return it省略主句用虚拟If only he knew En glish 4.i n caseTake a coat in case the weather turns cold 主祈使从现In case I forget, please remind me about it女口果我忘了请提醒我I ' ll give you my phone number in case you want to contact me主将从现注意:in case of+ 名词表条件 以防in that case在那种情况下In case of rain they can ' t go to the park万一下雨 他们就不能去公园了t care.(that)In that case, he would be puni shedAs long as it doesn ' t rain, we can go to playAs long as/so long as we don ' t lose heart, we ' ll find a way to overcome the difficultyYou can go to see the film as/so long as you arrive on time 只要你按时至M尔就能去看这场电影注意:as long as 还有…之久的意思You can keep it as long as you can = You can keep it as long as possible 你可以尽量久地保留它6.on conditiong that 条件是只要I ' ll come on con diton that Amy is invited too 我可以来条件是艾米也被邀请了Providing there is no objection, we shall make a decisionHe won' t be against us in the meeting provided (that) we ask for his advice只要我们征求他的意见8.suppose (that)=supposing (that) 假女口假设Suppos ing it rains, shall we visit the museum?Suppose that you are a famous writer, do you like to write such a book?9.o neeI ' ll make friends once I ' m settled in Paris.二、时态的一致He' ll be a doctor whe n he fini shes study ing here.If it doesn ' t rain tomorrow, we ' ll start 出发If you get the book, let me know.If you like, you can stay here for the weeke nd. 在这里过周末If you drink, don ' t drive2.如果谓语是want hope 等动词,则条件状从一般用一般现在时What do you want to do if you have much mon ey?I hope to see her if I ' m free3.有些句子中主从句都用一般现在时If you ring this number, no one answersIf you press the switch, the computer comes on 女口果你按这个开关计算机就会启动If you won ' t go, you needn ' t go/won ' t go 女口果你不愿意去,那就不去If you ' ll just wait a mome nt, I ' ll find some one to help you 女口果你愿意等一会我会找人帮你五、目的状语从句So that in order that lest 以免for fear that 唯恐so that in case以免1.so that 为了I spoke slowly so that you could un dersta nd me.2.in order that 为了She raised her voice in order that she might be heard= she raised her voice so that she might be heard 注意:in order that 与so that 可以改为不定式做目的状语=in order to do so as to do to doShe raised her voice so as to be heard 因为so as to do 不可以放句首In order to be heard she raised her voice = she raised her voice in order to be heardTo be heard she raised her voice = she raised her voice to be heardI wrote dow n the date of his birthday lest I should forget itI was afraid to open the door lest he should follow me4.for fear (that) 常与虚拟连用for fear that sb should/may/might doShut the window for fear that it may rainHe took an umbrella with him for fear that it might rain5.i n caseHe took a gun in case he met any wild ani mals 他带上枪以防遇至U野兽6.so这样为了Come to my house so I could tell you all about itHe wrote the Bible in Enlish so all could read it7.thatLet' s take the front seats that we may see more clearly.六、结果状语从句、 So …that such …that so that that soHe worked so hard that he passed the exam They were so excited that they cried out注意:1)So 位于句首句子倒装He was injured so badly that he had to be sent to the hospital.So badly was he injured that he had to be sent to the hospital The novel was so bori ng that he gave up read ing itSo bori ng was the no vel that he gave up readi ng it 2)如果结果状从是否定可以替换成too …to..句型David was so careless that he didn' t find the mistakes in his test paper.David was too careless to find the mistakes in his test paper.He was such a fool that he made a terrible mistakeThis book is writte n in such easy En glish that even little childre n can it.注意:such 位于句首倒装Such a good boy is he that we all love him注意:当有形容词的时候1)中间加单数可数名词it gave him such a shock that his face turned white白了I ' m thinking of buying it I ' m thinking of buying it副词如此激动以至于大喊大叫形容词un dersta nd使他如此震惊以至于他的脸都This is such a useful diet ionary that This is so useful a diet ionary thatHe is such a clever boy that all the teachers like himHe is so clever a boy that all the teachers like him2)中间加不可数名词只用such对He showed such concern that people took him to be a friend 他展示出如此的关心人们都把他当朋友了错He showed so concern that people took him to be a friend对It is such nice weather that all of us want to go to the park错It is so nice weather that all of us want to go to the park3).中间是负数可数名词They are such difficult problems that I don ' t know how to settle them.He made such a lot of mistakes that he had to give upThey are such fine teachers that we all respect them4)中间是much little many few 时Such a little boy has so little difficulty in working out this difficult problemthat I admire him very much 这样小的孩子解这道题遇到如此少的困难我很羡慕他He had so much work to do that he had to work late into the ni ghtThere are so few notebooks the I can ' t give you any 笔记本太少以至于我一本也不能给你There are many kinds of bikes that I don ' t know which to buy5) such= so + adjHis voice is such that we can ' t bear it3.so thatHe worked hard so that he passed the examI stayed up late last ni ght so that I feel sleepy now4.that 以至于The weather is terribly hot that I want to have a shower three times a day5.so以至于结果He played computer games every day so he failed the final exam二、so that 即引导目的状语从句也引导结果状语从句目的为了结果以至于结果…目的状从中常和can could may might will would 等情态动词连用The little boy saved every coin so that he could buy his mother a prese nt 能够买The little boy saved every coin so that he bought his mother a prese nt ,每一枚硬币结果买了He always studied hard so that he may make great progress 这样他才可以取得(目的)He always studied hard so that he made great progress 结果他取得了很大进步七、让步状语从句Though Although Even if Even though as while However+adj/adv= no matterhowWhatever= no matter what whoever= no matter who whomever =no matter whomWhichever =no matter which wherever =no matter where whe never= no matter whe n Despite in spite of 1.although=though 尽管虽然它们不可以与but连用但是可以与yet still 连用Although/though he is tired, he (still) keeps on working hard2.as Though 用倒装表示让步尽管虽然1).倒装名词Although/though he is a child, he can speak five Ian guagesChild though/as he is, he can speak five Ian guages2)倒装副词Although/though he works hard, he makes little progressHard though/as he works, he makes little progress3)倒装动词Although/though you may object, I ' ll carry out the experiment.Object though/as you may, I ' ll carry out the experiment.4)倒装形容词Tired though/as he is, he (still) keeps on work ing hardAmaz ing as it may seem Wedn esday ni ght was a quiet ni ght.Even if 与even though 可用于虚拟语气中Even if/Even though I were ill, I would attend the meeting 参加会议 Even if/Even though I am ill, I will attend the meeting议5. despite 尽管=in spite of + 名词引状语 Despite I miss him, I refused to call himIn spite of him ill ness, he still went to see his girlfrie nd.6. however + adj/adv = no matter how+ adj/adv 无论怎么 尽管No matter how difficult the problem may be, we will overcome it.However difficult the problem may be, we will overcome it.No matter how/ However fast you can run, you still can' t catch up with him 7. no matter which= whichever 无论哪个No matter which/whichever you like best, you have.无论你喜欢哪个你都可以拥有 8. no matter who=whoever 无论谁No matter who/ whoever you are, you must obey the law9. no matter whe n= whe never 无论何时No matter whe n/whe never she comes, she says the same words 无论她什么时候来她都 说同样话10. no matter whom=whomever 无论谁Whomever/ No matter whom you ask, you will not get the an swerNo matter where he goes, he always carry his suitcase手提箱No matter what do, I will support you注意:whatever 系列可以引导宾从 no matter 系列不可以对 You can buy whatever you like错 You can buy no matter what you like八、方式状语从句一、用法As if as though just as as tht way in the way(in) the same way just as…so …likeWhile I un dersta nd your point of view, I do not share it 我不苟同尽管我理解你的观点但是 即使天气不好我们也要we ll make a trip even if/even though the weather is bad. 做一次旅行 You should try to be nice to him, even though you donEven though/ Even if it is raining,I ' ll go to work 注意:'t like him 尽量对他好 尽管下雨我也要去上班 即便是我生病我也要去即使我生病了我也要参加会He looked like he had see n a ghost 他看起来好像见了鬼似的You talked just like your father does( 省略谓语)She acts as though she owns the placeShe treats him as if he was her own son他对待他就像自己的亲生儿子一样 3. just as 就像I fini shed the work just as you told me He must do as the doctor advised他必须按照医生说的去做When in Rome do as the Roma ns do5. just as …so …就像Just as you sow, so shall you reapJust as some people like sports, so some people like music 正如有些人喜欢体育有些人喜欢音乐6. the way …方式It looks as if it ' s going to rain 看上去好像要下雨了(与事实相符)It sou nds as though the situation would get worse.听起来好像情况会恶化似的 (与将 来事实不符2. 从句的省略(当主从句的主语一致时)He looked at me as if he were madHe looked at me as if mad但是He looked at me as if I were mad 不可以改He rushed outside as if he is to cryHe rushed outside as if to cryHe lay on ground as if he were deadHe lay on ground as if deadHe always knows everything as if he does it by instinetHe always knows everyth ing as if by in sti netYou should operate the mach ine the way you were told 机器7.in the wayWe must solve this problem in the way that we want it to 式解决问题8.( in ) the same wayHe is behavi ng (in ) the same way his father used to 样用你被告知的方式去操作这台 我们必须按照我们想要方 他的行为和他父亲过去的行为九、比较状语从句一、用法… the more As…as not as/so …as more …than less than the more more and more no more than notmore than1.as … asHe speaks English as fluently as his brother (does)2.not as/so … asI can ' t jump so/as high as he (does)I ' m not as pretty as my sister (is)3.more thanHe speaks English more fluently than his brother(does)Don' t carry more books than we need4.less … thanJoseph is less hon est tha n his brother (is hon est)5.the more …the more 越…就越…The more you eat, the fatter you areThe more you do, the less pleased he is二、特殊用法more tha n1.more than 放数词前"超过;不止;以上” =overMore tha n 70 perce nt of the surface of our pla net is covered by water.我们这个星球表面有70%以上都为水所覆盖2.more than 放名词前"不只是;不仅仅”Hiber nati on is more tha n sleep. 冬眠不仅仅是睡眠。
地点状语从句
常用连词:where
特殊连词:wherever (在……的任何地方), anywhere, everywhere
【点拨】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;而状语从句前则无需先行词。
Go back where you came from.(where引导地点状语从句)你从哪儿来回哪儿去。
Go back to the village where you came from. (where引导定语从句,修饰village)回到你来的那个村子里去。
时间状语从句
常用连词:when, as, while, as soon as, before, after, since , till, until, whenever (每当,一……就……)
特殊连词:the minute, the moment, the second, every time, the day, the instant, immediately, directly, no sooner ... than, hardly ... when, scarcely ... when 1.由when, while, as引导的时间状语从句when,while,as都有“当……时候”的意思。
1) when引导的从句的谓语动词既可以是延续性动词,又可以是瞬间性动词,并且when有时表示“就在那时”,相当于and at that time。
It was raining when we arrived. (指时间点)当我们到达的时候,天正在下雨。
When we were at school, we went to the library every day. (在一段时间内)
我们在学校上学的时候,每天都去图书馆。
We were about to leave when he came in.我们刚要离开,就在那时他进来了。
2) while引导的从句的谓语动词必须是延续性的,并强调主句和从句的动作同时发生(或者相对应),此外,while有时还可以表示对比。
I like playing football while you like playing basketball.
我喜欢踢足球,而你喜欢打篮球。
(对比)
He fell asleep while/when reading.看书的时候,他睡着了。
Strike while the iron is hot. (用as或when不可以,这里的while意思是“趁……”) 趁热打铁。
3) as表示“一边……一边”,as引导的句子的动词是延续性的动词,一般用于主句和从句动作同时发生;as也可以强调一先一后。
We always sing as we walk.我们总是边走边唱。
(as表示“一边……一边”)
Our headmaster laughed as she spoke.我们的校长边谈边笑。
2.由before“在……之前”和after“在……之后”引导的时间状语从句。
It will be four days before they come back.他们要过四天才能回来。
My father had left for Canada just before the letter arrived.
我父亲恰好在信到之前去加拿大了。
After you think it over, please let me know what you decide.
你仔细考虑过以后,请告诉我你是怎样决定的。
3.由till或until引导的时间状语从句。
其句型:...not + until + 短暂性动词;... (延续性动词)+until...
It was not until the meeting was over that he began to teach me English.
直到散会之后他才开始教我英语。
I worked until he came back. 我工作到他回来为止。
【点拨】not until...结构的强调和倒装
It was not until she had arrived home that she remembered her appointment with the doctor. 直到她到家才想起她和医生的约定。
Not until she had arrived home did she remember her appointment with the doctor. 直到她到家才想起她和医生的约定。
4.由since引导的时间状语从句。
Where have you been since I last saw you?自上次我和你见面以后,你到哪里去了?
It is four years since my sister lived in Beijing.我妹妹不在北京住有四年了。
【点拨】since引导的时间状语从句常用一般过去时。
5.由as soon as, immediately, directly, instantly, the moment, the instant, the minute, no sooner...than..., hardly...when...等引导的时间状语从句,这些连词都表示“一……就……”。
I will go there directly I have finished my breakfast一吃完早饭我就立即到那里去。
The moment I heard the news, I hastened to the spot
我一听到那个消息马上赶到了现场。
【点拨】表示突然发生某事或紧接着发生某事,常可译为“……还没/刚刚……就……”,“正在……忽然……”或“正要……这时……”,主要用于hardly/ scarcely…when…,no sooner…than…,be doing...when...和be about to do...when...这四个句式,前两个句型主句用过去完成时,从句用一般过去时。
I had hardly opened the door when the man hit me.我刚打开门,那个人就打了我一拳。
I was about to leave the room when the telephone rang我正要离开房间这时电话响了。
6.由the first (second/last) time, next time, any time, each time, every time, whenever, all the time, the whole time等引导的时间状语从句。
Whenever that man says “to tell the truth”, I suspect that he’s about to tell a lie.每当那个人说“实话说吧”的时候,我猜想他就要说谎了。
You grow younger every time I see you.每次遇到你,感觉你更年轻了。
原因状语从句
常用连词: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。
特殊连词:seeing that, in that, considering that, given that,considering
that, in as much as, in so much as
1.because引导的原因状语从句一般放于主句之后,because表示直接原因,语气最强,常回答why引导的疑问句。
I do it because I like it.我做这件事是因为我喜欢。
2.since引导的原因状语从句一般放于主句之前表示已知的、显然的理由(通常被翻译成“既然”),较为正式,语气比because弱。
Since you are free today,you had better help me with my mathematics.
既然今天你休息,你最好帮我补习数学。
【点拨】seeing (that), now (that), considering (that), in that这几个词汇与since 引导的原因状语从句意思相近,都表示“既然”。
Now (that) you are grown up, you should not rely on your parents.
既然你长大了,就不应该依靠你的父母了。
3.as引导原因状语从句时表示附带说明的“双方已知的原因”,语气比since弱,较为正式,位置较为灵活(常放于主句之前)。
As it is raining, you’d better take a taxi.既然在下雨,你最好乘出租汽车。
4.for是并列连词,连接并列句。
for引导的句子并不说明行为发生的直接原因,只提供一些辅助性的补充说明
He could not have seen me, for I was not there.
他不可能见过我,因为我不在那里。