Since用法总结及习题
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since的用法总结
Since是一个介词,表示从那时起,引出一个动作或事件发生的时间点。
表示自那个时间点以来,持续到现在的一段时间,有时也可以用“以来”来替换。
通常用来表示过去发生的事情对现在造成的影响。
1.和时间有关。
Since用来表示从某一时间点开始,到现在一段时间的过去的某一时
刻开始,也可以用for来替换。
例如:I have been in China since
next Monday.(从下周一起,我就住在中国了。
)。
2.和原因有关。
Since也可表示因果关系,用来表示某件事发生后接下来发生的事情,表示从一个原因到接下来的结果。
例如:I have worked hard since I entered the university.(从我上大学以来,我就一直努力学习。
)。
3.和限定有关。
since 用来限定一段时间,表示从某一时刻以来一直到现在都仍在保
持着某种情况。
例如:He has stuck to his job since he got it.(从
他接手这份工作以来,一直坚持做下去。
)。
4.和习惯性动作有关。
since和for的用法题型一、引言英语语法中的时间状语从句是我们常见的一种句子结构,它能够帮助我们表示出动作发生的时间点或者持续的时间长度。
而在这些时间状语从句中,常常会用到两个常见的介词:since和for。
然而,很多学习者在使用这两个介词时会有些困惑,不知道应该如何准确地运用。
本文将详细介绍since和for的用法,并举一些例子来解释差异。
二、定义1. since的用法首先,让我们来看看since的用法。
Since表示某个事件或动作开始发生的时间点,并且通常和过去完成时态连用。
例如:- I have known her since 2010.(我认识她自从2010年起。
)2. for的用法其次,让我们了解for的使用场景。
For表示一个动作或状态持续存在的时间长度,并且通常和延续性动词(如live、work等)连用。
例如:- He has been living here for three years.(他在此居住已经三年了。
)三、具体区别1. since与for之间的主要区别为了更好地理解since与for之间的不同,下面我们将列出一些明显区别:(1) 时间点vs. 时间长度Since表示特定的时间点,指的是从某个事件开始算起;而for则指时间段的长度。
(2) 过去完成时vs. 现在完成进行时由于since通常和过去完成时连用,用于强调从过去某一点开始到现在一直保持的动作或状态;而for则通常和现在完成进行时连用,用于表示一个动作或状态持续的时间长度。
(3) 句子位置与语态差异Since可以位于句首或句中作状语从句;而for通常使用主动语态,并将其放置在句子中间或者末尾。
2. since的进一步解释及例子(1) 按照时间点举例下面是几个以时间点为基础,使用since来描述过去到现在间断性发生事情的例子:- I haven't seen her since last Monday.(我自上周一之后就没见过她了。
since的用法总结1.求since的用法归纳since的用法:译作“自从…以来”(1)接时间点:如 I have stayed in that country since 1995. 要求:谓v.用现在完成时,而且须是延续性动词。
(2)接一段时间 + ago:如 They have lived in that house since two years ago. 要求:谓v.用现在完成时,而且须是延续性动词。
(3)接时间状语从句:如 I have loved her since I met her last time. / Lily has stayed at home since she left school. 要求:主句的谓v.用现在完成时,而且须是延续性动词;从句的谓v.用一般过去时,而且须是终止性动词。
(4)用于句型“It's / It has been + 一段时间 + since + 时间状语从句”中,译作“自从…以来,已经…(时间)了”。
如 It's / has been three months since he moved to this city. 要求:主句的谓v.用一般现在时或现在完成时;从句的谓v.用一般过去时,而且须是终止性动词。
(5)用于句型“一段时间 + has passed since + 时间状语从句”中,译作“自从…以来,…(时间)已经过去了”。
如上个例句还可写成:Three months has passed since he moved to this city. 要Word文档 1求:主句的谓v.用现在完成时,而且动词必须是has passed;从句的谓v.用一般过去时,而且须是终止性动词。
(6)注:当since用于否定句时,主句的谓v.可以是终止性动词。
如 He hasn't seen the film since last month.(7)相关词组:“从那时起”:ever since、since then、from then on.注:ever since作为一个词组,放句尾可单独使用。
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 ①arrive at/in sw. get to/reach sw. come/go/move to sw. →be in sw./at school/at home/on the farm/be here/be there 1) He got to Beijing five minutes ago. He ________ _________ _________ Beijing for _________ _________. 2) I moved to the USA last year. I ________ ________ __________ the USA since __________ __________. 3) I went home yesterday. I _______ ________ _________ home for _________ __________. 4) They came here last week. They _________ _________ here since _________ __________. ②come/go back, return →be back come/go out →be out 1) He came out two years ago. He _________ __________ _________ for __________ __________. 2) We return to Fuzhou yesterday. We ________ ________ _________ to Fuzhou since __________. ③become →be 1) I became a teacher in 2000. I ________ __________ a teacher for _________ _________. 2) The river became dirty last year. The river _________ _________ dirty for _________ __________. ④close →be closed open →be open 1) The shop closed two hours ago. The shop ________ _________ _________ for _________ _________. 2) The door opened at six in the morning. The door ________ ________ ________ for six hours. ⑤get up →be up die →be dead leave sw. →be away from sw. fall asleep/get tot sleep →be asleep finish/end →be over marry →be married 1) I got up two hours ago. I ________ ________ ________ since ________ ________. 2) He left Fuzhou just now. He _______ ________ ________ _________ Fuzhou for five minutes. 3) My grandpa died in 2002. My grandpa _______ _______ ________for _______ ________. 4) The meeting finished at six. The meeting ________ ______ ______ for six hours. 5) I got to sleep two hours ago. I ________ _________ _________ since _________ __________. 6) They married in 1990. They ________ _________ __________since _________. ⑥start/begin to do sth. →do sth. begin →be on 1) I began to teach at this school in 1995. I ____ ____ at this school since ____. 2) The film began two minutes ago. The film ____ ____ ____ for ____ ____. ⑦borrow →keep lose →not have buy →have put on →wear catch/get a cold →have a cold get to know →know 1) They borrowed it last week. They _________ _________ it since __________ __________. 2) I bought a pen two hours ago. I _________ _________ a pen for ________ __________. 3) I got to know him last year. I _________ __________ him since __________ __________. 4) I put on my glasses three years ago. I __________ __________ my glasses for _________ _________. ⑧have/has gone to →have been in 1) He has gone to Beijing. He ____ ____ _____ Beijing for two days. ⑨join the league/the Party/the army →be a league/a Party member/a soldier →be a member of the league/the Party →be in the league/the Party/the army 1) He joined the league in 2002. He ________ _________ a _________ _________ for two years. He ________ __________ a __________ ___________ the __________ for two years. He ____________ ___________ ___________ the league for two years. 2) My brother joined the army two years ago. My brother __________ __________ a ___________ for ___________ ___________. My brother ___________ ___________ in ____________ ___________ for two years. 3.汉译英 1)这本字典我已买了三年了。
since后接延续性与短暂性动词的用法一、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。
所以,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是:“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。
itissince用法归纳"Since"是一个常用的英语词汇,可以作为介词、副词、连词和名词,具有多种用法。
下面是对于"since"的各种用法的详细归纳。
1.作介词用法:- 当"since"表示时间时,用来表示动作或事件开始的具体时间点。
例如:"I haven't seen him since last year."(我自去年以来就没有见过他。
)- 当"since"表示原因或理由时,用来引出一个事件或情况作为解释或说明。
例如:"Since you're not feeling well, you should stay home."(既然你感觉不舒服,你应该待在家里。
)2.作为副词用法:- 当"since"表示从过去的一些时间点开始一直延续到现在,用来表达过去与现在之间的时间段。
例如:"He has been working here since 2024."(自2024年以来他一直在这里工作。
)- 当"since"表示由于或因为的意思时,用来引出一个原因或理由。
例如:"She hasn't eaten anything since breakfast."(早餐以后她什么都没吃。
)3.作为连词用法:- 当"since"表示自从的意思时,连接一个过去时间点和现在的状态或情况。
例如:"He has been studying English since he was a child."(自从他小的时候起就一直在学习英语。
)- 当"since"表示因此或所以的意思时,连接一个原因和结果。
例如:"He didn't study for the test, since he thought it was easy."(他没有为考试而准备,因为他觉得很简单。
since的用法归纳及例句since表示的时间往往是从过去某一点时间一直延续到说话的时间,意思是“自从…以来”,因而一般与完成时态连用。
since的用法归纳一、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。
例句:She’s been working in a bank since leaving school.她中学毕业后就一直在一家银行工作。
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。
例句:He came to Zhenjiang 6 years ago and has lived here (ever) since.他6年前来到镇江,从此便住在这里。
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。
例句:Since this method doesn’t work, let’s 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”。
例句: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。
2、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动词的过去时时,则从句表示的时间是“从动作或状态结束时算起”。
例句:I haven’t heard any noise since I slept.我醒后还未听到任何声音。
3、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。
since的用法归纳总结一、介绍since的含义及基本用法在英语中,since是一个常见的词汇,它有多种用法和含义。
首先,since可作为介词使用,表示时间上的起点。
其次,since也可以作为连词使用,引导一个原因从句。
无论是作为介词还是连词,since都具有不同的含义和语法结构。
本文将对since的不同用法进行归纳总结。
二、表示时间上的起点1. 表示某个动作或事件发生的起点当since被用来表示时间上的起点时,通常与过去完成时(Present Perfect)连用。
例如:I have lived in this city since 2010.我从2010年就开始住在这座城市。
2. 表示自特定时刻一直延续到现在当我们想要表达从过去某个时刻一直延续到现在的情况时,可以使用present perfect tense (have/has + 过去分词) 加上 since来表示这种关系。
例如:He has been studying English since he was a child.他从小就开始学习英语,并一直持续至今。
三、引导原因从句除了用于表示时间上的起点之外,since还可以作为连词引导一个原因从句。
在此用法中,“since + 句子”通常放在句子的开头或者句中逗号后。
这种用法表示一个事实,解释为什么主句所陈述的情况发生。
1. 表示因果关系当我们想要陈述一个因果关系时,可以使用since来引导一个原因从句。
例如:Since it was raining, we decided to stay indoors.由于下雨,我们决定呆在室内。
2. 引导解释原因的从句有时候,我们需要解释为什么某种情况或观点是正确的。
此时,可以使用since来引导一个从句来提供相关解释。
例如:He wasn't selected for the team, since he didn't meet the necessary qualifications.由于他不符合必要的资格条件,所以没有被选入队伍。
since的用法总结归纳下面是小编整理的一些关于介词since的用法的总结,希望能帮助大家更好地认识since这个单词,学好英语。
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 haven’t seen him since then.1982年他离开这个村子,从那以后我再没见过他.2、She’s 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:1.He left home two weeks ago and we haven’t 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.2.He came to Zhenjiang 6 years ago and has lived here (ever) since.他6年前来到镇江,从此便住在这里.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 didn’t come since he was busy.他因为忙,所以没有来.2. Since thi s method doesn’t work,let’s 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 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.2.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动词的过去时时,则从句表示的时间是“从动作或状态结束时算起”.例如: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,所以这句应译为“我醒后还未听到任何声音”.3.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.例如: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”.五.Since在特殊句型中的应用句型I:“It is (has been)+时间+since+持续性动词的过去时”,表示“自从……以来到现在已有多久.”例如:It has been quite some time since I was last in London.我上次离开伦敦至今颇有一段时间了.句型II:“It was+时间+since+持续性动词的过去完成时”,表示“从……到过去某时间点以来”,例如:It was three years since we had been here.那时我们在这已呆了三年.。
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 haven’t seen him since then.1982年他离开这个村子,
从那以后我再没见过他。
2、She’s 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:
1.He left home two weeks ago and we haven’t 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。
2.He came to Zhenjiang 6 years ago and has lived here (ever) since.他6年前来到镇江,从
此便住在这里。
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 didn’t come since he was busy.他因为忙,所以没有来。
2. Since this method doesn’t work,let’s try anoter.既然这种方法不行,我们就试用另一
种吧。
四.Since在特殊句型中的应用
句型I:“It is (has been)+时间+since+持续性动词的过去时”,表示“自从……以来到
现在已有多久。”例如:
It has been quite some time since I was last in London.我上次离开伦敦至今颇有一段时间
了。
句型II:“It was+时间+since+持续性动词的过去完成时”,表示“从……到过去某时间点以
来”,例如:It was three years since we had been here.那时我们在这已呆了三年。
六.巩固练习
(一)单项选择
1.—Do you smoke?
—_____ .It's two years since I smoked.
A.Yes,I do B.No,I don't C.Not too much D.Oh,but I wish I didn't
2.Since you are busy, you __________ tomorrow.
A. don’t need come B.need not come C. needn’t come D.mustn’t come
3.---Has he been home?
---______,he _________home since he graduated.
A. No; hasn't been B.Yes;has been C.No; isn’t D.Yes; is
4.They _________friends since they met in Shanghai.
A.haven’t been B.have been C. aren’t D. are
5.I_______here since he left the door open,but it seems that he won’t come back today.
A. have been waiting B.will have waited C.was waiting D.waited
6.I _________ from him since he has lived here.
A. heard B. have heard C. have never heard D.have been hearing
7. He came to China _______ 1998.
A. from B. since C. at D. in
8.-- Excuse me.Did you notice whether the No.18 bus had gone by?
--I don't know_ I began to stand here just now.
A.as B.when C.since D.while
现在完成进行时和现在完成时练习
1. — I’m sure Andrew will win the first prize in the final.
— I think so. He ________ for it for months. (2008江苏)
A. is preparing B. was preparing
C. had been preparing D. has been preparing
2. By the time he realizes he _________ into a trap, it’ll be too late for him to do anything about it.
(2008山东)
A. walks B. walked C. has walked D. had walked
3. So far this year we _______ a fall in house prices by between 5 and 10 percent. (2008福建)
A. saw B. see C. had seen D. have seen
4. Cathy is taking notes of the grammatical rules in class at Sunshine School, where she ______
English for a year. (2007湖南)
A. studies B. studied C. is studying D. has been studying
5. Danny _________ hard for long to realize his dream and now he is popular. (2007福建)
A. works B. is working C. has worked D. had worked
BCABACDC DCDDC