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1、since的用法,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 Eg：I have not heard from him since I lived in Shanghai.错误翻译为：自从我住在上海以来，就再也没有收到他的信了。,since作连词引导时间状语从句的用法,Eg：He has studied very hard since he came to our school.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”。自从他来到我们学校，他学习就非常努力。自从他们离开这里，我们就一直很想念他们 We ha
2、ve been missing them since they left here,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“从那持续动作结束或状态结束时算起”。,I havent heard any noise since I slept.Sleep 为持续性动词，sleep的动作结束时，即“醒来”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
3、在纽约，他不当教师已经三年了。I have not heard from him since I lived in Shanghai.自从我离开(没住在)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:,It is half a month since he was a student.他已经不是学生半个月了。Its been quite a long time since I was last in London.我离开伦敦已很长时间了。,举例比较,1.He has written to me frequently since I was ill.2.He h
4、as written to me frequently since I fell ill.句1从句谓语动词为状态动词句2从句谓语动词为终止性动词自从我病愈以来，他屡次给我写信。自从我生病以来，他屡次给我写信。,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，则表示从动作和状态发生延续到现在（说话时刻）。,I havent 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 own
5、ed 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 Ive been at this school,we have had three headmasters.2.Since I was at this school,they have had three headmasters.1.自从我到这所学校，我们已换了三个校长了。2.自从我离开这所学校，他们已换了三个校长了。,1.He has never been to see me since I have been ill.2.He has never been to see me since I was ill.1.自从我生病以来，他从未来看过我。2.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。,
