since的用法总结
以下是小编为大家整理的since的用法总结,希望可以帮助到你们提高英语水平!
since释义
prep.从…以来; 自从…之后; 自从;
adv.以后，此后; 后来; (距今几年)以前; (从那时候起几年)以前
conj.自从…以来; 自从…的时候起; 既然; 因为
since的用法
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。
since的用法例句
(表示时间)从…以来; 自从…之后
I have lived here since January.
自一月份以来, 我一直住在这里。
He had seen her only once since the meeting.
自从那次会议以来, 他只见过她一次。
He's been working in a bank since leaving school.
自从毕业后, 他就一直在一家银行工作。
I have not seen him since then.
从那以后我再也没见过他。
从过去某时间以来[以后, 到现在]
He disappeared many years since.
他多年以前就不知去向。
Her husband died 10 years ago but she has since remarried.
她丈夫于十年前去世, 但她后来又嫁人了。
I've long since forgotten what our quarrel was about.
我早就忘掉我们为什么吵架了。
It was not long since that I returned.
我是在不久前回来的。
He came to London 3 years ago and has lived here ever since.
他三年前来到伦敦, 此后就一直住在这里。
自从(过去某事)以来[以后, 到现在]
Since I left college, I have not seen him.
自从我离开大学以后, 就没有见过他了。
They have never been to see me since I was ill.
自从我生病之后, 他们一直没来看过我。
Since I have owned a bicycle, I have gone to school by it every day.
自从我有了一辆自行车后, 我每天骑车上学。
因为; 既然; 由于
Since it is late I shall go home now.
由于时间晚了, 我现在要回家了。
Since you are so sure of it he'll believe you.
既然你对此这么有把握, 他会相信你的。
since的用法练习题
1. He has ____ the army for ten years and now is an officer.
A.gone into
B.joined in
C.been in
D.come into
答案：C.(其余三组动词均为瞬间动词，不能和段时间连用。)
2. You don't have to describe her. I _____ her several times.
A.had met
B.have met
C.met
D.meet
答案：B.
I _____ on the door for ten minutes now without an answer.
A.was knocking
B.am knocking
C.knocking
D.have been knocking.
答案:D。 因为该句是说到目前为止已经敲了10分钟了，但没人应答。动作一直持续十分钟。因此完成进行时态是最合适的。
for和since的用法区别
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)
for和since的用法例句
例句比较
he has been dead for three years
he has been dead since three years ago
He has studied English since 2003
He has studied English since he was ten years old
for和since的用法练习题
用since和for填空
1) ______ two years2) _______ two years ago3) _______ last month
4) ______ 19995) _______ yesterday6) _______ 4 o’clock
7) ______ 4 hours8) _______ an hour ago9) _______ we were children
10) _____ lunch time11) ______ 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.
选择题
1. Three years ________since I ________ you last time.
A. have passed; metB. has passed; metC. passed; have met
2. He has been here _______ he left his hometown.
A. since B. in C. for
3. —He ________the English-Chinese dictionary for about twenty years，but it is still new.
—What a careful man!
A. has bought B. has borrowed C. has had
4. ---When did China _____ the WTO?---China _____ the WTO for several years.
A. join; has been a member of B. join; has joined C. take part in; have been in
5. How long have you _____ the book?
A. bought B. borrowed C. kept
6. How time flies! Several years _______ since we started our middle school life. We will keep the pleasant experiences in our minds.
A. have passed B. has passed C.will pass
7. Mr Fan _____ this bike in 2005. He ______ it for 10 years.
A.bought, has bought B.has bought, has had C. bought, has had
8. He ___ in our school for 20 years and he ___ here in 1977. ?A. has taught; came B. has taught; has come C. taught; came D. has teached; has came
9.They are late. The film ___ for five minutes. ?A. has begun B. has started C. has been on D. began
10.We have been friends since _____.
A. five years B.five years ago C. five years before
since then的用法
since then意为 "从那时以来"，通常与动词的现在完成时连用，指从过去某一时刻起到现在为止的一段时间。
Since then 前后各接什么时态
Since then 前后一般接现在完成时，从那以后，现在完成时表示过去的某件事对现在还有影响， 现在完成时的标志性时间状语already , ever , never , yet , just , before, still , lately ,since , for a long time ,up to now, until,so far,in the last few years/weeks/mouths , till now,recently
since then的用法例句
Since then, he has developed another bad habit.
从那以后,他养成了另一种坏习惯。
He hasn't come close to those numbers since then.
自那以后，他从没有达到那赛季的表现。
Ah, times are greatly changed since then!'
“啊，从那时起，世道可变得多厉害呀!”
Exactly three years have passed since then.
从那时起，整整3年过去了。
ever since释义
自从;从那时到现在;自…以后;从…起
ever since的用法
1.ever since 的结构：(作为连词)=since 完成时态---- ever since +主+动词简单过去式
例：I have known him ever since he was a child. ?他从小我就认识他了。 ?这种用法同since 差不多，不过 ever since 比 since 用得少。
再如：We have lived in Shanghai ever since we came to China.(自从我们来到中国之后就住在上海。) ?
2.以上所说的 ever since 作为连词。 ?
ever since 也可作为副词，解释“此后”(就一直...) ?
例：
1)He fell ill at Christmas and has been ill ever since. ?他在圣诞节生病了此后就一直不适。(has + be ill)
2)He left home last year and has been away ever since. ?他去年离家走了，此后一直在外面。(has + be away) ?3)He fell off his horse a week ago and has been in bed ever since. ?一周前他从马背上跌下来，从那以后就一直躺在床上。 ?4)He went to Turkey in 1950 and has lived there ever since. ?他在1950年去土耳其，此后就一直住在那里。 ?
3. has not been able to 这实际上就是 be able to 加上 have 罢了。
所谓 be able to 就是“有可能”不是“能”(can)。如果一直，始终没有可能就是has not been able to ,这很简单。 ?如果 it has not been easy. 就是“那件事一直不是轻而易举的。”完成时态不一定都解释为“已经”，有时要解释为“一直”。 ?相关词汇：?have trouble with sb. 与某人发生了纠纷 ?return home 不可用 return to home ?at night 不可用 at the night ?because of 由于 ?even once 即使是一次 ?have effect 产生效果 ?turn ... to 把···变为
ever since的用法例句
1、He's been there ever since you left!
自从你离开后他就一直在那里!
2、I simply gave in to him, and I've regretted it ever since
我就向他屈服了，从那以后我一直后悔。
3、I've had the hots for him ever since he came to college.
自从他来上大学后，我就对他春心萌动。
4、The girl has grown prettier than ever since I saw her a year ago.
一年不见，小姑娘出落得更漂亮了
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