since用法小结6页.doc





《since用法小结6页.doc》由会员分享,可在线阅读,更多相关《since用法小结6页.doc(6页珍藏版)》请在淘文阁 - 分享文档赚钱的网站上搜索。
1、如有侵权,请联系网站删除,仅供学习与交流since用法小结【精品文档】第 6 页Since常见的四种用法 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 si
2、nce 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用法详解:我们都知道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,将该句理解为:“自从我住在上海以来,就再也没有收到他的信。”而实际上这个句子的含义并非如此,那么正确的理解是
3、什么呢?让我们先来看看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动词的过去时,则从句表示的时间是“从动作开始的那一时刻起”, 这是最常见的一种用法。如:He has studied very hard since he came to our school.自从他来到我们学校,学习就非常努力。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,则从句表示的时间是“从那个持续动作或状态结束时算起”。如:John is now with his parents in New York; it is already three
4、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。”这种句型常被人们误解,我们再多举几个例子看看:It is half a month since he was a League member. 他退团半个月了。It”s been quite some time since I was 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,他经常给我写信。
5、(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,他就经常给我写信。(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。自从他住在那儿起,我就一直没收到他的来信。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。Since we have owned a car, we
6、 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: 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。由此可见,since引导的从句中,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
7、的。It is + 一段时间 + since . 这个句型与It has been + 一段时间 + since . 意思相同。如:It is ten years / It has been ten years since they last met.自从他们上次碰面之后已经10年过去了。Since 用法小结 一Since作为介词,后接某一确定的时间点,主句谓语动词是持续性动词,常与现在完成时态、现在完成进行时态或过去完成时态连用。例如: 1、He left the village in 1982 and I havent seen him since then.1982年他离开这个村子,从那
8、以后我再没见过他。 2、Shes been working in a bank since leaving school.她中学毕业后就一直在一家银行工作。 3.He had spoken to her only once since the party. 自从那次聚会以来,他只跟她说过一次话。 二Since作为副词,表示从过去以来、以后或到现在的情形或状态,常与现在完成时态连用。例如: 1He left home two weeks ago and we havent heard from him since. 他两周前离开了家,到现在我们一直没有他的消息。2He came to Zhenj
9、iang 6 years ago and has lived here (ever) since.三since引导原因状语从句 作为连词,since可引导原因状语从句,表示因为;既然;鉴于:例如: 1 He didnt come since he was busy.他因为忙,所以没有来。 2 Since this method doesnt work, lets try another.既然这种方法不行,我们就试用另一种吧。 四Since引导时间状语从句 1若since引导的状语从句的谓语是终止性动词的过去时,则从句表示的时间是“从动作开始的那一时刻起”。例如: He has studied
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- since 用法 小结

限制150内