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since-从句的用法

since-从句的用法
since-从句的用法

since-从句的用法

一、若since引导的状语从句的谓语动词是终止性的过去时,则从句表示的时间是“从动作开始的那一时刻起”。如:

He has studied very hard since he came to our school.自从他来到我们学校,他学习就非常努力。

We have been missing them since they left here自从他们离开这里,我们就一直很想念他们。

这是最常见的一种用法,此处不再多述。

二、若since引导的状语从句的谓语动词是持续性动词或表示状态的动词的过去时时,则从句表示的时间是“从那持续动作或状态结束时算起”。如:

I haven’t heard any noise since I slept. Sleep 为持续性动词,sleep的动作结束时,即“醒来”时,这句应译为“我醒后还未听到任何声音”。

三、若since引导的状语从句的谓语为持续性动词的现在完成时,则表示动作和状态延续到现在(说话时刻),其表示的时间的起点应从动作发生之时算起。如:

I haven’t heard from him since he has lived there。

这里has lived表示动作的持续性,时间的起点应从:“开始居住”时算起。因此此句可理解为“自从他(开始)住在那儿起,我就一直没收到他的来信”。

至于It is +一段时间+since…的句型与It has been +一段时间+since…意思相同。前者是规范说法,后者是口语说法。

应注意的是,在这种结构中,since引导的从句绝对不能用否定式的谓语动词来表示否定意义,下面两句都错了:

It is a long time since he didn’t study English.

It’s two months since you didn’t come to see me.

正确的说法为:

It’s a long time since he studied English 他好久没学英语了。

You haven’t come to see me for two month s. 你有两个月没来看我了。

since的用法

1) since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half past six)。

I have been here since 1989.

2) since +一段时间+ ago

I have been here since five months ago.

3) since +从句

Great changes have taken place since you left.

Considerable time has elapsed since we have been here.

4) It is +一段时间+ since从句

It is two years since I became a postgraduate student.

since的用法主要有两点:一是表示“自从……以来”,二是表示“既然”之意。但如果只了解词的含义,而不了解其用法,在使用时就会造成错误。例如:I have not heard from him since I lived in Shanghai.

不少人会望文生义,将该句译为:“自从我住在上海以来,就再也没有收到他的信了。”而实际上这个句子的译文并非如此,那么正确的含义是什么呢?

下面谈谈since作连词引导时间状语从句的用法。

一、若since引导的状语从句的谓语动词是终止性的过去时,则从句表示的时间是“从动作开始的那一时刻起”。如:

He has studied very hard since he came to our school.自从他来到我们学校,他学习就非常努力。

We have been missing them since they left here自从他们离开这里,我们就一直很想念他们。

这是最常见的一种用法,此处不再多述。

二、若since引导的状语从句的谓语动词是持续性动词或表示状态的动词的过去时时,则从句表示的时间是“从那持续动作或状态结束时算起”。如:

I haven’t heard any noise since I slept. Sleep 为持续性动词,sleep的动作结束时,即“醒来”时,这句应译为“我醒后还未听到任何声音”。

John is now with his parents in New York, it is already three years since he was a teacher约翰现在和父母一起住在纽约,他不当教师已经三年了。

本文开始出现的那个句子就可以译为“自从我离开上海,就再也没有收到他的信。”这种译法常被人们误用,我们不妨再多举几个例子看看:

How long is it since you lived in Shanghai?你离开(没住在)上海多久了?

It is half a month since he was a League member.他退团(不当团员)半个月了。

It’s been quite some time since I was last in London我离开伦敦已很长时间了。

比较:He has written to me frequently since I was ill.自从我病愈以来,他屡次给我写信。(从句谓语为状态动词)

He has written to me frequently since I fell ill.自从我生病以来,他就屡次给我写信。(从句谓语为终止性动词)

三、若since引导的状语从句的谓语为持续性动词的现在完成时,则表示动作和状态延续到现在(说话时刻),其表示的时间的起点应从动作发生之时算起。如:

I haven’t heard from him since he has lived there。

这里has lived表示动作的持续性,时间的起点应从:“开始居住”时算起。因此此句可理解为“自从他(开始)住在那儿起,我就一直没收到他的来信”。

Since we have owned a car, we have gone camping every year。自从我们自己有了汽车,我们每年都去野营。

试比较:1. Since I’ve been at this school, we have had three headmasters.自从我到这所学校,我们已换了三个校长了。

Since I was at this school, they have had three headmasters.自从我离开这所学校,他们已换了三个校长了。

2.He has never been to see me since I have been ill. 自从我生病以来,他从未来看过我。

He has never been to see me since I was ill. 自从我病愈以来,他从未来看过我。

由此可见,since引导的从句持续动词的一般过去时和现在完成时所表示的意思恰好相反。换言之,前者以肯定的语法形式反映着否定的逻辑内容,而后者的形式与内容是一致的。

至于It is +一段时间+since…的句型与It has been +一段时间+since…意思相同。前者是规范说法,后者是口语说法。

应注意的是,在这种结构中,since引导的从句绝对不能用否定式的谓语动词来表示否定意义,下面两句都错了:

It is a long time since he didn’t study English.

It’s two months since you didn’t come to see me.

正确的说法为:

It’s a long time since he studied English 他好久没学英语了。

You haven’t come to see me for two months. 你有两个月没来看我了。

1.时间状语从句 常用引导词:when, as, while, as soon as, 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 … when 2.地点状语从句 常用引导词:where 特殊引导词:wherever, anywhere, everywhere 3.原因状语从句 常用引导词:because, since, as, for 特殊引导词:seeing that, now that, in that, considering that, given that. 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 that 5.结果状语从句 常用引导词:so … that, such … that, 特殊引导词:such that, to the degree that, to the extent that, to such a degree that 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, supposing that, in case that, on condition that 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, whichever 8.比较状语从句 常用引导词:as(同级比较), than(不同程度的比较) 特殊引导词:the more … the more … ; just as …,so…; A is to B what /as X is to Y; no … more than; not A so much as B 9.方式状语从句 常用引导词:as, as if, how 特殊引导词:the way

初中英语学习材料 madeofjingetieji since 和for 的用法(用于现在完成时) 表示过去已经开始持续到现在的动作或状态常用的时间状语有:for, since, how long, so far, these days等。 1. since : a).since +时间点①年代②时刻数③一段时间+ago b).现在完成时:主句(主语+have/has +延续性动词的过去分词)+ since +从句一般过去时 c) It’s +时间段+since +短暂性动词的过去式 d).时间段+has passed +since +短暂性动词的过去式 for +一段时间 练习: 用since和for填空 1) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here 12). He has lived in Nanjing ________ the year before last. 13). I’ve known him __________ we were children. 14). Our teacher has studied Japanese _________ three years. 15). She has been away from the city ___________ about ten years. 16). It’s about ten years __________ she left the city. 2. for: for +一段时间= since +一段时间+ ago 3. 与时间段连用时,短暂性动词应改为相应的延续性动词。 1) come/go to ------ be at /in 2)leave ----be away from 3)buy ----have 4) borrow /lend -----keep 4)open ---be open 5)close---be closed 6) die---be dead 7) start/begin ----be on 8) join—--be in /be a member of /be a soldier 9) become –be 10) fall asleep ---be asleep 11)catch a cold – have a cold 12) have/has gone to → have been in 13) put on → wear14) finish/end → be over 15) marry → be married 练习:.短暂性转换延续性 1) His grandfather died two years ago . His grandfather has ____ ____ for two years. _____two years _____ his grandfather ____. Two years ____ ____ ____ his grandfather _____. 2) I became a teacher in 2000. I ________ __________ a teacher for _________ _________. 3) The shop closed two hours ago. The shop ________ _________ _________ for _________ _________. 4) The door opened at six in the morning. The door ________ ________ ________ for six hours. 5)He left Fuzhou just now. He _______ ________ ________ _________ Fuzhou for five minutes. 6)The film began two minutes ago. The film ____ ____ ____ for ____ ____.How time flies! 7)They borrowed it last week. They _________ _________ it since __________ __________. 8)I bought a pen two hours ago. I _________ _________ a pen for ________ __________. 9)They married in 1990. They ________ _________ __________since _________. 10)The meeting finished at six. The meeting ________ ______ ______ for six hours. 11)My brother joined the army two years ago.

引导时间状语从句的五类引导词 引导时间状语从句的从属连词(以下称引导词)很多,为方便记忆,现作以下分类:1. 基本类 包括before, after, when, while, as, since, till, until, once, as soon as 等。如: Did anyone call when I was out? 我不在家时谁来过电话吗? We have known each other since we were children. 我们从小认识。 You’ll feel better after you take the pills. 吃完药丸后你会感到好一些。Make sure that all the lights are off before you go to bed. 睡觉前一定要关灯。 Don’t promise him anything till we’ve had time to think about it. 在我们有时间考虑之前别答应他什么。 2. 名词类 即由名词词组充当引导词,包括the moment, the minute, the second, the instant 等(均表示“一……就……”。如 I loved you the instant (that) I saw you. 我一见到你就爱上你了。 Tell me the moment (that) you get the results. 你一拿到结果就给我打电话。 3. 副词类 即由副词充当引导词,如 immediately, directly, instantly等。如: I came immediately you called. 你一打电话我就来了。 Directly I walked in the door I smelt smoke. 我一进门就闻到烟味。 4. 短语类 主是几个涉及time短语,如every time,each time,(the) next time,any time,the last time,the first time 等。如: Next time you come in, please close the door. 下次你进来,请关门。 My roof leaks every time it rains. 每次下雨,我的房顶就漏。 He felt nervous each time she spoke to him. 每次她和他讲话,他都感到紧张。 The last time we talked he said he needed another two days. 上次我们谈话时他说他还需要两天。 5. 句型类 包括no sooner…than, hardly…when 等。如: I had no sooner closed the door than somebody knocked. 我刚把门关上就有人敲门。 Hardly were the words uttered when he began to regret them. 话刚说出口他就开始后悔了。

because、since、as、for的用法区别 because、since、as、for这几个词都是表示“原因”的连词,语气由强至弱依次为:because→since→as→for。其中because、since和as均为从属连词,引导原因状语从句;而for是并列连词,引导并列句。 ?because because表示直接原因,它所指的原因通常是听话人所不知道的,其语气最强。常用来回答why的提问,一般放在主句之后,也可以单独存在例如: (1)Istayed at home because it rained. 因为下雨,我呆在家里。 (2)B ecause Lingling was ill, she didn’t come to school. 玲玲因为生病,没有上学。 (3)—Why is she absent? 她为什么缺席? —Because she is sick. 因为她病了。 (4)此外,在强调句型中只能用because。例如, It was because I missed the early bus that I was late for school. 我上学迟到是因为我错过了早班车。 ?since since侧重主句,从句表示显然的或已为人所知的理由,常译为“因为、既然”,语气比because稍弱,通常置于句首,表示一种含有勉强语气的原因。例如: (1)Si nce he asks you, you’ll tell him why. 他既然问你了,那就告诉他为什么吧。 (2)Si nce everyone is here, let’s start. 既然大家都到齐了,我们就是出发吧。 (3)Since I understood very little Japanese, I c ouldn’t follow the conversation. 我日语懂得不多,因而听不懂对话。 ?as as是常用词,它表示的“原因”是双方已知的事实或显而易见的原因,由于理由不是很重要,含义与since相同,但语气更弱,没有since正式,常译为“由于,鉴于”。从句说明原因,主句说明结果,主从并重。例如:

现在完成时态中的since 与for 1. 实例: We have studied English for more than 2 years. 我们学英语已有两年多时间了。 She has been ill since last Sunday. 她从上周星期天一直病到现在。 2. 用法说明: (1) 介词for 短语表示一个时间段,指某个动作或情况到现在为止已持续了多久,提问时用how long;since 作为介词,接一个时间名词,作为连词,引导一个时间状语从句(从句动词一般是短暂性动词),since 表示“自…以来”,指某个动作或情况从过去某一点时间一直持续到现在,因此,与for 或since 引出的时间状语连用的句子(或主语)谓语动词必须是持续性的(如上面两句中的动词study 和be) (2) 英语中有些动词的意义不能持续,表示的是一瞬间就结束的动作,这些动词被称为非持续性动词或短暂性动词,常见的如come, leave, go, lose, see, begin, start, arrive, bec ome, die, buy, borrow, close, join, reach, fall, get up 等。这类动词可以用于完成时态,但在肯定句中不能与表示动作延续的时间状语for 或since 短语连用。如:正:He has come back. 他已回来。 误:He has come back for three days. 若要表示“他回来已三天了”这样的意思,可以将动词改为延续性动词,或改变时间状语,或改用别的句型等,如译为: He has been back for three days. (改变谓语动词) He has been back since three days ago. (改变谓语动词) He came back three days ago. (改变时间状语及动词时态) It’s three days since he came back. (改变句型) (3) 非持续性动词用于完成时态,在肯定句中不能与for 或since引出的短语(或句子)连用,但在否定句中是可以的,因为一个非延续性动词一旦被否定即成为状态,而状态总是可以延续的。如:(https://www.doczj.com/doc/e817856666.html,) I haven’t seen him for a long time. 我很久没见到他了。 He hasn’t come here for some time. 他有段时间没来了。 I haven’t heard from her since she left. 自他离开以后,我一直没收到她的来信。

状语从句引导词的含义 1、表示时间的: ·when(何时;什么时候) ·whenever(每当;无论何时) ·as(同样的;像......一样;当......的时候) ·while(一段时间;当......的时候;和......同时;然而) ·before(在......以前)after(在......时候) ·until、 till(直到......为止) ·since(从......以来;自从;由于;既然) ·ever since(从那时起一直到现在) ·now( that) (既然;由于) ·once(一次;一度;从前) ·so (as) long as (只要) ·as soon as(一......就......) ·every time (每次;总是) ·the moment (片刻) ·instantly(立即,即刻) ·directly (马上,立即) 2、表示地点的: ·where(在哪里) ·wherever(无论在(到)哪里;在(到)任何地方)no matter where 3、表示原因: ·as(同样的) ·because(因为) ·since(既然) ·seeing (that)(由于) ·considering? that(考虑到) ·now that(既然,由于) ·not that ......but that (不是.......而是......) 4、表示目的: ·that(那,那个) ·so that(以便,以致;结果是) ·in order(以便;为了) ·lest (唯恐,免得。在被连接的状语从句中常用should或原形动词)·for fear that (免得,省得) ·in? case(以防、以备) 5、表示结果: ·that (那,那个) ·so? that(以便,以致,结果是) ·so......that (如此......以致) ·such......that (如此的.....以致)

现在完成时Since和for的用法 Since 和for 的用法 表示过去已经开始持续到现在的动作或状态常用的时间状语有:for, since, how long, so far, these days等。 Since+过去点的时间,for+一段时间(数词+量词),此划线部分用how long提问。 一、since短语或从句表示过去的动作延续至今,since之后的时间为一点。如: Mr. Smith has worked here since 1984. 1984年以来,史密斯先生一直在这工作。 He’s learned about 5,000 English words since he went to college. 他上大学以来大约学了五千个英语单词。 二、for短语表示动作延续多长时间,for的宾语为时间段。如: We have known each other for twenty years. 我们认识有二十年了。 I haven’t seen her for a long time. 我好久没有见到她了。 练习:用since和for填空 1) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here 1. He has lived in Nanjing ________ the year before last. 2. I’ve known him __________ we were children. 3. Our teacher has studied Japanese _________ three years. 4. She has been away from the city ___________ about ten years. 5. It’s about ten years __________she left the city. 2.短暂性转换延续性

藤县第三中学微课设计模板(参考使用) 录制时间: 2016年6月15日微课时间:7.54分钟微课名称for 和 since的用法 知识点描述for 和 since 在现在完成时态中的用法 知识点来源学科:英语年级:八年级教材:人教版章节:第十单元页码: 73 □不是教学教材知识,自定义:是 基础知识听本微课之前需了解的知识: 现在完成时态的用法以及for和since定义和用法 教学类型√□讲授型□问答型√□启发型□讨论型√□演示型□联系型□实验型□表演型□自主学习型□合作学习型□探究学习型□其他 适用对象学生:本微课是针对本学科平时成绩多少分的学生? □40分以下□40-60分□60-80分 √□80-100分□100-120分□120-150分 教师:□班主任□幼儿教师√□普通任课教师□其他其他:√□软件技术□生活经验□家教□其他 设计思路这是语法课,因此我用归纳法讲解,通过例子,然后总结,再比较,最后得出结论。 教学过程 内容画面时间 一、片头(20秒以内)内容:您好,这个 微课重点讲解辨 析for和since的 用法 第 1 至张PPT 2秒 二、正文讲解(4分20秒左 右)第一节内容:辨析 for和since的用 法 第 2 至11 张PPT 315 秒 第二节内容:典型 例子 第 12 至 14张PPT 116 秒

第三节内容:总结内容第 15 至张PPT 40 秒 三、结尾(20秒以内)内容:感谢大家能 认真的听完这个 微课,希望大家回 去后多做练习加 以巩固。 第 16至张PPT 1 秒 教学反思(自我评价)本微课通过用PPT的方式讲解了for和since的用法,因为是辨析两个单词的用法,因此我用了归纳法进行讲解,让学生在例子中发现规律,然后进行总结。但是,在讲解的过程中,我所举的例子可能太少了,给学生思考和练习的时间也很少,中等以下的学生可能对知识点还不是很理解。通过这节微课,我觉得在以后教学中,我要认真分析学生的认知能力,顾及大部分学生,然后寻找更好的教学方法,或者在讲解释可以使用多种方法,归纳法或者演绎法等,让学生理解所教授的内容。另一个不足之处是,我在制作课件的时候并没有很好地运用多媒体技术,因此,在以后的教学中,我还要多学习多媒体在教学中的运用。

S i n c e-和-f o r-的用 法及区别 -CAL-FENGHAI-(2020YEAR-YICAI)_JINGBIAN

Since 和 for 的用法及区别: 一,since 的四种用法 1,since + 过去一个时间点(如具体的年、月、日期、钟点、ago. 1990 , last month , half past six I have been here since 1990. 1990起,我一直在这儿。 2,since+ 一段时间+ago I h a v e b e e n h e r e s i n c e f i v e m o n t h s a g o。自从五个月前,我已经在这儿了。 3,since+从句Great Changes have taken place since you left. 自从你走后,已经发生了很大的变化。 4,It is +一段时间+since从句 I t i s t w o y e a r s s i n c e I b e c a m e a n E n g l i s h t e a c h e r.我成为英语老师有两年了。 二,Since 和for区别 1,Since +时间点,具体时间 “自从、、、、以来,从、、、以后”用来说明动作起始时间 I have been in Beijing since 2010. 2,For + 时间段,用来说明动作延续时间长度,因此句中的谓语动词,也应该是延续性动词。 I have been in Beijing for one year。 We have learnt English for about three years. I have been here for 3 days. (对) I have arrived here for 3 days.(误) 三,延续性动词和终止性动词的概念 英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。 延续性动词 表示能够延续的动作,这种动作可以延续下去或产生持久影响。如:

一,since 的四种用法 1,since + 过去一个时间点(如具体的年、月、日期、钟点、ago. 1990 , last month , half past six I have been here since 1990. 1990起,我一直在这儿。 2,since+ 一段时间+ago I h a v e b e e n h e r e s i n c e f i v e m o n t h s a g o。自从五个月前,我已经在这儿了。 3,since+从句Great Changes have taken place since you left. 自从你走后,已经发生了很大的变化。 4,It is +一段时间+since从句 I t i s t w o y e a r s s i n c e I b e c a m e a n E n g l i s h t e a c h e r.我成为英语老师有两年了。 二,Since 和for区别 1,Since +时间点,具体时间 “ 自 I have been in Beijing since 2010. 从 、以来,从、、、以后”用来说明动作起始时间 2,For + 时间段,用来说明动作延续时间长度,因此句中的谓语动词,也应该是延续性动词。 I have been in Beijing for one year。 We have learnt English for about three years. I have been here for 3 days. (对) I have arrived here for 3 days.(误) 三,延续性动词和终止性动词的概念 英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。 延续性动词 表示能够延续的动作,这种动作可以延续下去或产生持久影响。如: learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep,

常用的状语从句引导词 1.时间状语从句 2.常用引导词:when当……时候;while当……时候;as随着…;一边…… before在……之前;after在……之后 since 自从;ever since自从;once一旦; till直到;until直到;not…until…直到……才…… 其他引导词:as soon as, the minute, the moment (一……就……) the instant, immediately , directly, (一……就……) no sooner … than…, hardly …when…, scarcely … when…(刚…就..) every/each time(每次…);next time(下次….);the first time(第一次…) 2.地点状语从句 常用引导词:where 其他引导词:wherever无论何地, anywhere任何地方, everywhere 处处 3.原因状语从句 常用引导词:because(有强烈因果关系), since既然, as, for(补充说明原因) 其他引导词:seeing that鉴于…, now that既然…; for the reason that…因为… 4.目的状语从句 常用引导词:so that如此…以至于, in order that…为了…… 其他引导词:lest, in case, for fear that(以防万一,唯恐,生怕)

5.结果状语从句 常用引导词:so … that, such … that(如此……以至于……) …so that…所以 6.条件状语从句 常用引导词:if如果, unless除非, as/so long as只要,only if只要…..就…… 其他引导词:providing/provided that, supposing that, on condition that(如果) in case that万一,如果 7.让步状语从句 常用引导词:though, although, even if, even though尽管,即使 其他引导词:as尽管,即使(要倒装),while 虽然, no matter+疑问词= 疑问词+ever如:no matter how= however 8.比较状语从句 常用引导词:as…as…像……一样(同级比较), not so/as…as…和……不同 more …than 多于;less…than少于 than比(不同程度的比较) 其他引导词:the more … the more … 越……越……;just as …正如 9.方式状语从句 常用引导词:as好像, just as正如 as if, as though好像

“SI因为”because for as since because, as, for, since这几个词都是表示“原因”的连词,语气由强至弱依次为:because→since→as→for;其中because, since, as均为从属连词,引导原因状语从句;而for 是并列连词,引导并列句。 1. because表示直接原因,它所指的原因通常是听话人所不知道的,其语气最强。常用来回答why的提问,一般放于主句之后,也可以单独存在。例如: (1)I stayed at home because it rained. 因为下雨我呆在家里。 (2)Because Lingling was ill, she didn”t come to school. 玲玲因病,没有上学。 (3)——Why is she absent? 她为什么缺席? ——Because she is sick. 因为她病了。 此外,在强调句型中,只能用because。例如: (4)It was because I missed the early bus that I was late for school. 我上学迟到是因为我没有赶上早班汽车。 2. since侧重主句,从句表示显然的或已为人所知的理由,常译为“因为”、“既然”,语气比because稍弱,通常置于句首,表示一种含有勉强语气的原因。例如: (1)Since he asks you, you”ll tell him why. 他既然问你,那就告诉他为什么吧。 (2)Since everyone is here, let”s start. 既然大家都到齐了,我们就出发吧! (3)Since I understood very little Jap anese, I couldn”t follow the conversation. 我日语懂得不多,因而听不懂对话。 3. as是常用词,它表示的“原因”是双方已知的事实或显而易见的原因,或者理由不是很重要,含义与since相同,但语气更弱,没有since正式,常译为“由于,鉴于”。从句说明原因,主句说明结果,主从并重。例如:

A for与表示一段时间的短语连用:for six days六天for a long time 很久 for与一般过去时连用,表示一段终结了的时间:We lived there for ten years.我们在那里住过十年。(但我们现在不住那里了) for与现在完成时连用表示延续到现在的一段时间:We have lived in London for ten years.我们在伦敦已经住了十年。(并且还住在那里) for有时可以省略,特别是在be,live和wait之后:We’ve been here an hour/two days.我们在这里已经呆了一小时/两天了。 表示时间的for不能用于以all开头的短语的前面:They’ve worked all night.他们整整干了一晚上。 B since与某一时刻连用,表示从那一时刻到说话时为止。除下文D与第188节所述外,它总是与完成时态连用。She has been here since six o’clock.从6点钟起她一直在这里。(并且现在还在这里) We’ve been friends since our schooldays.从上学的时候起我们就是好朋友了。 C注意:last和the last之间存在着差别。比较:(a)I have been here since last week(month,year etc.). 我从上周(上月、去年等)起一直在这里。(b)I have been here for the last week.过去一周内我一直在这里。 第一句里last week意指大约七天前的某一时刻,而第二句的the last week却意指刚刚结束的七天长的时间。 D since+从句也可表示相同的意思:I’ve worked here since I left school.离开学校后我就一直在这里工作。 ever since作副词用:He had a bad fall last year and has been off work ever since.他去年摔伤了,从那以后就没工作过

九大状语从句的引导词 时间状语从句: when(当…..时候), while(当….时候) ,as(当..时候,一边), after(在….之后), before(在…..之前), since(自从), ever since(自从)till/until(直到),not….until(直到..才),as soon as(一...就),whenever(不管什么时候),every time(每次),each time(每次)next time(下次),the first time(第一次)any time(任何) the moment(一...就...)by the time(到...), directly(一..就...), immediately(一...就..), instantly(一...就..), as long as(长达), hardly/scarcely… when….(一..就..)once(一..就..)no sooner… than….(一...就..) 地点状语从句: where, wherever=no matter where(无论哪里) 原因状语从句:because(因为), as(因为), since(自..以来), for(因为),for the reason that(因为),considering that, due to the fact that, owing to the fact that, in that(因为), seeing that(因为),considering that/since (既然)等 条件状语从句: if(如果), unless(除非), as(so) long as(只要),in case(万一) on condition that(条件是) supposing(假设),provided that(如果) ,as far as /so far as(就…而言),even though, even if (即使), providing(that), 方式状语从句:as(正如), just as(就好像,正如), as if(好像), as though(好像) 让步状语从句: although(尽管), though(尽管), even if(即使), even though(即使), as, whether…or….(无论....),no matter what /when/how(无论什么,何时,怎样),now that(既然), despite(尽管),in spite of 目的状语从句:that, so that(如此...以此于), in order that(为了), lest(唯恐)in case(唯恐), 结果状语从句: so that, so….that, such…that(如此…….以至于) 比较状语从句:as….as(和...一样), not so…..as(not as…..as)(不如...), more…than(多于)less….than, the+比较级…. ,The+比较级…..

because, as, for, since这几个词都是表示“原因”的连词,语气由强至弱依次为: because→since→as→for;其中because, since, as均为从属连词,引导原因状语从句;而for 是并列连词,引导并列句。 1. because表示直接原因,它所指的原因通常是听话人所不知道的,其语气最强。常用来回答why的提问,一般放于主句之后,也可以单独存在。例如: (1)I stayed at home because it rained. 因为下雨我呆在家里。 (2)Because Lingling was ill, she didn”t come to school. 玲玲因病,没有上学。 (3)�Why is she absent? 她为什么缺席? �Because she is sick. 因为她病了。 此外,在强调句型中,只能用because。例如: (4)It was because I missed the early bus that I was late for school. 我上学迟到是因为我没有赶上早班汽车。 2. since侧重主句,从句表示显然的或已为人所知的理由,常译为“因为”、“既然”,语气比because稍弱,通常置于句首,表示一种含有勉强语气的原因。例如: (1)Since he asks you, you”ll tell him why. 他既然问你,那就告诉他为什么吧。 (2)Since everyone is here, let”s start. 既然大家都到齐了,我们就出发吧! (3)Since I understood very littl e Japanese, I couldn”t follow the conversation. 我日语懂得不多,因而听不懂对话。 3. as是常用词,它表示的“原因”是双方已知的事实或显而易见的原因,或者理由不是很重要,含义与since相同,但语气更弱,没有since正式,常译为“由于,鉴于”。从句说明原因,主句说明结果,主从并重。例如: (1)We all like her as she is kind. 我们都喜欢她,因为她善良。 (2)As I had a cold, I was absent from school. 因为我感冒了,所以没去上课。 (3)As Xiaowang was not ready, we went without him. 由于小王没有准备好,我们只好不带他去了。 4. for用作连词时,与because相似,但它所表示的原因往往提供上文未交待过的情况。for 不表示直接原因,表明附加或推断的理由,因此for被看作等立连词,它所引导的分句只能

since 和for 的用法(用于现在完成时) 表示过去已经开始持续到现在的动作或状态常用的时间状语有:for, since, how long, so far, these days等。 1. since : a).since +时间点①年代②时刻数③一段时间+ago b).现在完成时:主句(主语+have/has +延续性动词的过去分词)+ since +从句一般过去时 c) It’s +时间段+since +短暂性动词的过去式 d).时间段+has passed +since +短暂性动词的过去式 for +一段时间 练习: 用since和for填空 1) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here 12). He has lived in Nanjing ________ the year before last. 13). I’ve known him __________ we were children. 14). Our teacher has studied Japanese _________ three years. 15). She has been away from the city ___________ about ten years. 16). It’s about ten years __________ she left the city. 2. for: for +一段时间= since +一段时间+ ago 3. 与时间段连用时,短暂性动词应改为相应的延续性动词。 1) come/go to ------ be at /in 2)leave ----be away from 3)buy ----have 4) borrow /lend -----keep 4)open ---be open 5)close---be closed 6) die---be dead 7) start/begin ----be on 8) join—--be in /be a member of /be a soldier 9) become –be 10) fall asleep ---be asleep 11)catch a cold – have a cold 12) have/has gone to → have been in 13) put on → wear14) finish/end → be over 15) marry → be married 练习:.短暂性转换延续性 1) His grandfather died two years ago . His grandfather has ____ ____ for two years. _____two years _____ his grandfather ____. Two years ____ ____ ____ his grandfather _____. 2) I became a teacher in 2000. I ________ __________ a teacher for _________ _________. 3) The shop closed two hours ago. The shop ________ _________ _________ for _________ _________. 4) The door opened at six in the morning. The door ________ ________ ________ for six hours. 5)He left Fuzhou just now.

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