由网友()分享简介：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...

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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关于since的用法及解释

　　在学习英语的过程中我们会遇到许多大大小小的困难，如果来引导时间状语since呢，接下来小编在这里给大家带来since的用法及解释，我们一起来看看吧!

　　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 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”。

　　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的相关解释

　　prep.

　　自…以后;从…以来;(表示气愤)何曾，什么时候

　　conj.

　　从…以后;自…以来;因为;由于;既然

　　adv.

　　自…以后;从…以来;此后;后来

　　since的例句

　　1. In the dozen years since the publication of the first edition of this book, software and interactive products have certainly improved.

　　本书的第1版问世以来，12年间，软件和交互产品的确有所进步。

　　2. Texture is seldom useful for conveying differences or calling attention, since it requires a lot of attention to distinguish.

　　纹理很少被用来表达不同或者引起注意，因为分辨纹理需要很强的注意力。

　　3. Expanding dialog boxes were big around 1990 but have declined in popularity since then, largely due to the ubiquity of toolbars and tabbed dialogs.

　　扩展对话框大约在1990年左右非常流行，自那以后主要是因为工具栏和标签对话框的无所不在而走向衰落。

　　4. It isn’t unreasonable to suspect a similar pattern in any kind of interface navigation, since this number is consistent with how much information we can hold in our short-term memories; when there are too many colors, we spend time trying to remember what the colors mean, so that slows us down.

　　这个数字同我们的短期记忆能力有关，我们的短期记忆仅仅能存储有限的信息。因此当有太多颜色时，我们的大脑不得不花费额外的时间记住每种颜色的意义，这样便降低了我们的处理速度。所以，在任何界面的导航中都是这样的情况，我们毫无理由超过这个数字。

　　5. Ultimately, the use of folders or directories as a primary retrieval mechanism requires that users know where an item has been stored in order to locate it. This is unfortunate, since digital systems are capable of providing us with significantly better methods of finding information than those physically possible using mechanical systems.

　　所以作为主要检索机制的文件夹或者目录，最终需要使用者知道一个物品到底放在哪个位置，才可以找到它。这就很不幸了，按道理讲，和各种各样的物理世界中的机械系统相比，数字世界应该有能力提供给我们更加优越的查找信息的手段，我们下面要谈的是如何提高这种检索能力。

　　6. The document that was current at the time of the version selection will be created as a version itself. Also, since disk space is hardly a scarce resource these days, it makes sense to create versions regularly, in case it doesn’t occur to your users.

　　这个文档在这个时刻也应该成为一个新版本。另外，既然现在磁盘空间并不是什么稀缺资源，所以有规律地生成版本是有意义的，以防使用者自己没有定时保存。

　　7. Also, we don’t want to rely on hue as the sole communication vector, since color-blindness is quite common.

　　还有由于存在着色盲现象，因此我们也不能依赖颜色，把它当做是唯一的传达矢量。

　　8. This behavior makes sense, since scrolling over long distances requires gross motor movements that make it difficult to stay within the bounds of the narrow scrollbar control.

　　这种行为很有道理，因为长距离的滚动需要粗略运动控制，使其难以保持在滚动条控件的范围内。

　　9. While multiple Undo is certainly a very useful mechanism, there’s no reason not to finish the job and use our ample computing resources to allow users to Undo just the undesirable actions, instead of everything that has happened since them.

　　尽管多次撤销显然是很好的，但也没有理由放着充裕的计算机处理能力不用，而让使用者撤销并不想撤销的操作，最后还是撤销了之前全部所有操作。

　　10. Of course, adjust these properties with restraint, since the most important element doesn’t need to be huge, red, and outdented—often, varying just one of these properties will do the trick.

　　当然，因为最重要的元素也无须同时是巨大且红色，而且还是向外突出的，所以我们要谨慎使用这些属性。一般来说，调整其中一个属性就可以了。

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.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.

　　2.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.

　　3.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.

　　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 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.

　　2.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.

　　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 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.

介词的用法归纳有哪些需要注意的

　　介词又称作前置词，表示名词、代词等与句中其他词的关系，介词的用法你都了解吗，今天学习啦小编在这里为大家分享一些介词的用法归纳，欢迎大家阅读!

　　介词的用法归纳

　　1. 时间介词in 、on 、at 、by 的用法辨析

　　A.介词in用来表示一天中某段时间，指天、年、月、季节、周次等。如：in the morning

　　B.介词on用来表示某一天或星期几，指明具体的时间。如：on a rainy day

　　C.介词at用来表示特定的时间、节日、年龄等。如：at noon

　　D.介词by表示…的时候、到、等到…已经等用在天、时间的前面。如：by 2 o‘clock

　　2. 时间介词in 与after 的用法辨析

　　A.介词in + 一段时间用于一般将来时。如：We’ll go to school in two weeks.

　　B.介词after + 一段时间用于一般过去时。如：My mother came homeafter half an hour.

　　C.介词after + 时间点常用于一般将来时。如：We’ll go out for awalk after supper.

　　3. 时间介词for 与since 的用法辨析

　　A.介词for 表示一段时间如：I have been living here for 10 years.

　　B.介词since 表示从过去某一时间以来如：I have been living here since 2000.

　　4. 时间介词during 与for 的用法辨析

　　A.当所指的时间起止分明时用介词during如：He swims every day during the summer.

　　B.如果一段时间不明确则用介词for如：I haven’t seen her for years.

　　5. 时间介词before 与by 的用法辨析

　　A.介词before表示“在…之前”如：He won’t come back before five .

　　B.介词by表示“到…时为止，不迟于…”如：The work must be finished by Friday.

　　6. 时间介词till 与until 用法的异同

　　A.till和until用在肯定句中，均可表示“直到…为止”，如：I will wait till(until)seveno'clock.

　　B.till和until用在否定句中，均可表示“在…以前”或“直到…才”。

　　如：Tom didn't come back till(until)midnight.

　　C.till多用于普通文体，而 until则用于多种文体，并且在句子开头时，用until而不用till。

　　如：Until he comes back，nothing can be done.

　　7. 不用介词表达时间的几种情况

　　A.当表示时间的词前有this, that时，其前面不用介词，如：this morning

　　B.当表示时间的词前有next时，其前面不用介词，如：next Sunday

　　C.当表示时间的词前有last时，其前面不用介词，如：last Sunday

　　D.当表示时间的词前有one, any, each, every, some或all时，其前面不用介词，如：You can come any day.

　　方位介词与地点介词的用法辨析

　　1. 方位介词on, over, above 的用法辨析

　　A.介词on表示一物放在另一物上面，两者紧贴在一起，如：The book is on the table.

　　B.介词over表示一种垂直悬空的上下关系，即“在…上方”，如：Is there any bridge over the river?

　　C.介词above表示一般的“高于…”，“在…之上”，如：There was an electric clock above his bed.

　　2. 方位介词under 与below 的用法辨析

　　A.介词under是over的反义词即“在…下方”，如：They were seen under the tree.

　　B.介词below是above的反义词即“低于…”，“在…之下”，如：They live below us.

　　3. 方位介词across, 、through 、over, 、past 的用法辨析

　　A.介词across着重于“从一头或一边到另一头或另一边”，强调从表面穿过。

　　如：She went across the street to make some purchases.

　　B.介词through着重于“穿越”，强调从一定的空间内穿过。

　　如：The sunlight was coming in through the window.

　　C.介词over多表示从“上方越过”，如：He failed to go over the mountain; he had to go round it.

　　D.介词past表示从“面前经过”，如：Someone has just gone past the window.

　　4. 方位介词in 、on 、at 的用法辨析

　　A.介词in表示“排、行、组”，如：We are in Team One.

　　B.介词on表示“左、右”，如：Li Ping is on my left.

　　C.介词at表示“前、后”，如：I sit at the front of the classroom.

　　5. 方位介词to 、for 的用法辨析

　　A.介词to表示目的地或去的目的，如：Wil you take a train to Tianjian.

　　B.介词for表示动身去某地，如：He got on a train for Shanghai.

　　6. 地点介词at 与in 的用法辨析

　　A.介词at表示较小的地方，如家、村、乡村等，如：He lives at a small village.

　　B.介词in表示较大的地方，如大城市、国家、洲等，如：He lives in Beijing.

　　7. 地点介词at 与on 的用法辨析

　　A.介词at用于门牌号，如：He lives at No.200, Nanjing Road.

　　B.介词on用于路名，如：He lives on Nanjing Road.

　　8. 地点介词in 、on 、to 的用法辨析

　　A.介词in表示“包含”如：Beijing is in the north ofChina.

　　B.介词on表示“紧邻”如：Canada lies on the north of theU.S.

　　C.介词to表示“没接触”如：France lies to the south of England.

　　其他易混介词的用法辨析

　　1. 动作介词to 与toward 的用法辨析

　　A.介词to表示向某处移动，如：They were driving to work together.

　　B.介词toward 表示移向某处，如：We're moving toward thelight.

　　2. 原因介词because 、as 、for 的用法辨析

　　A.介词because表示“因为;由于”指直接的、明确的原因，回答why的问句，语气最强。

　　如：The boy was absent because he was ill.

　　B.介词as表示“由于;鉴于”指一种显而易见、谈话双方已知的理由。

　　如：She stayed at home as she had no car.

　　C.介词for表示 “因为;由于”指一种间接原因，甚至只是一种附带的说明。

　　如：It must have rained last night, for the road is wet.

　　3. 材料介词of 和from 的用法

　　A.介词of用于成品与材料的性质不变时，如：The desk is made of wood.

　　B.介词from用于成品与材料的性质已变时，如：Wine is made from grapes.

　　4. 表示“ 用” 的介词in 、with 、by 的用法辨析

　　A.介词in表示“用材料、语言”如：Can you say it in English?

　　B.介词with表示“用工具、某物”如：with a pen

　　C.介词by表示“用、以、靠、通过…方法”如：He prefers traveling by car.

　　5. 介词between 与among 的用法辨析

　　A.介词between 表示“在两者之间”如：Don’t sit between the two girls.

　　B.介词among表示“在…当中(三者或以上)”如：They lived among the mountains in the past.

　　6. 介词besides 与except 的用法辨析

　　A.介词besides表示“除…之外(全部计算在内)”如：We have seen the crocodile besides Li Fang.

　　B.介词except表示“除…之外(不计算在内)”如：We are all Chinese except Tomin our class.