现在完成时态中for和since的用法区别

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现在完成时以及for,since的用法

for +一段时间表示时间的持续强调一段时间 have / has been + doing sth + since +过去的时间点表示“自从过去某一时间点以来” 强调动作或状态一直延续到现在 since + 从句 (一般过去时) 表示从过去开始一直持续到现在的动作，并有可能持续下去．与过去时的比较：1.I watched TV for three hours.我看了三小时的电视．（我现在没有看电视了）2.I have been watching TV for three hours. 我看了三小时的电视．（我现在仍然在看电视）一．用for 或者since 填空。

填空。

1.They have been learning Chinese since they came to China. 2. I haven’t seen her ___for __ a long me. 3. He has been living here _since____ 2001. 4. She has been doing her homework __for__two hours. 5. It’s 5 years __since___ we le school. 6. – How long has Mary been a teacher? – __since___ two years ago. 7.I have been prac cing the piano _since ___ 10:30. 8.Maricia has been running __for__ 15 minutes. 9.Sarah has been sleeping ___since__ 9:00. 10.Dale has been talking on the phone __for___5 minutes. 11.Louie has been studying Chinese __since__ he was 6 years old.. 12.I have been watching you __for__10 minutes. 二．单项选择题。

英语现在完成时Since和for的用法

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 month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children10) _____ lunch time 11) ______ she left here1. 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 there1) 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 out1) He came out two years ago.He _________ __________ _________ for __________ __________.2) We return to Fuzhou yesterday.We ________ ________ _________ to Fuzhou since __________.③become → be1) 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 open1) 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 deadleave sw. → be away from sw.fall asleep/get tot sleep → be asleepfinish/end → be over marry → be married1) 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 on1) 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 → wearcatch/get a cold → have a cold get to know → know1) 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 in1) 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 membe r of the league/the Party→ be in the league/the Party/the army1) 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的用法时态for

since的用法时态for一级标题：用法介绍since是英语中常用的时间连词，可表示自某个具体时间点开始至今持续发生的动作、状态或事件。

它在句子中常与现在完成时态(for)搭配使用，构成since...for结构。

具体来说，since用来指明一个动作或事件开始发生的特定时间点，而for则用来表示该动作、状态或事件的持续时间。

本文将详细介绍since的用法和时态for，并给出一些相关例句。

二级标题1：指明起始时间1. since + 具体时间点当我们想表达从具体的某一时刻（如日期、时间）开始发生的情况时，可以使用since + 具体时间点的形式。

例如：- I have been studying English since last year.我从去年开始学英语。

- John has been living in London since 2010.约翰从2010年开始住在伦敦。

2. since + 过去时态动词短语当我们想表达自过去某个动作或事件以来一直延续至今的情况时，可以使用since + 过去时态动词短语。

例如：- She hasn't returned to her hometown since she left two years ago.自两年前离开后，她就没有回过家乡。

- They have been good friends since they met in college.自从大学相识以来，他们一直是好朋友。

二级标题2：表示持续时间1. for + 时间段很多情况下我们需要表达一个动作或事件持续了多久，这时可以使用for + 时间段。

例如：- I have been working in this company for five years.我在这家公司工作已经五年了。

- We have lived in this city for a decade.我们在这个城市生活已经十年了。

现在完成时for 和since用法

现在完成时二用法：过去完成时表示过去发生的动作或存在的状态一直持续到现在（包括现在在内），常与for和since引导的时间状语连用，动词需要用延续性动词。

如：Mr.Green has been in China for 10 years .(格林先生来中国10年了)The film has been on for 20 minutes.(电影开始已经20分钟了)Since 与for的区别：for后面跟一段时间如：for three days for 2 years 等+ 过去的时间点：since 2004Since+ 一段时间ago ：since two minutes ago+ 过去时的句子：since I came to this school用since 和for 填空：1.I have kept the book _______ a week , I must return it on time .2.We have learned English _______ 5 years ago, so we have learned it ______ 5 years.3.Miss Li has taught maths ________ she came to this school ..4.I have had a cold _______ yesterday.5.The workers have worked _______ 10 hours . They are very tired.6.Great changes have taken place in China ______ it was founded.7.Our teacher has studied Japanese ______ three years.8. She has been away from the city ______ about ten years.9.. It’s about ten years __________ she left the city.短暂性动词的完成时态不能和表示一段的时间状语连用，当它需要与表示一段时间的时间状语连用时，通常需进行转化，见书119页。

《现在完成时中since和for的用法》知识讲解

《现在完成时中s i n c e和f o r的用法》《现在完成时中since和for的用法》微课讲课稿一、引入新课同学们好，本节课我们主要学习现在完成时中since和for的用法二、学习for的用法首先，我们来看两个句子Number OneI came to this school last week. 我上周六到这所学校Number TwoI have been in the new school for a week. 我到这所新学校已经一周了我们来看一下，第一句中的last week用于一般过去时的句子，第二句中的for a week用于现在完成时的句子。

a week 是一个时间段,因此我们用“for+时间段”来表达一段时间。

那同学们看一下，如果我们把第一句话中的last week 改成last year，那么第二句话中的for a week该改成什么呢？对，应该变成for a year.三、学习since的用法接下来，我们再看两个句子Number OneLily left home last Friday. 丽丽上周五离开家Number TwoLily has been away from home since last Friday. 丽丽自从上周五已离开家我们来看一下，第一句中的last Friday是过去的一个时间点，因此这句话用一般过去时表达，而第二句中since last Friday 用在现在完成时的句子中，last Friday 是一个过去的时间点，因此我们用“since +时间点”来表达一段时间它有三个具体用法，我们来详细学习一下1、since+过去一个时间点，如具体的年月、星期、小时。

eg：1990、last night、half past six我们来看一个例句：I have been here since 1990. 我自1990年以来一直在这里1990是过去的一个时间点，since 1990, 就是since+过去一个时间点来表达一段时间的第一个用法2、since+一段时间+ago，表示“自···时间前开始至今”我们来看一个例句：He has been here since five years ago. 他在这儿已经有5年了five years 是一段时间，since后不能直接跟时间段，但后面再跟ago是可以的，因此since five years ago 就是since+时间段+ago来表达一段时间的第二个用法3、since+一般过去时从句我们来看两个例句Number OneMany things have changed since you left. 自从你走后许多事情发生了变化“you left”是一个一般过去时从句。

现在完成时中的for和since知识点复习：八年级上册英语

现在完成时中的for和since知识点复习：
八年级上册英语
(1)for + 一段时间(用How long提问)
We have known each other for ten years. 我们相识10年了。

(2)since + 句子/具体时间
since 引导的短语或从句用How long提问
①since+过去一个时间点(具体的年、月、日、钟点等)。

Tom has eaten nothing since yesterday.
②since + 一段时间+ago
We have been friends since five months ago. 从5个月前起，我们就成了朋友。

③since+从句，表示“自过去某个时间、某件事情以来”，从句时态：一般过去时。

I have lived here since I left Shanghai.
④It is+一段时间+since从句，表示“自从某件事发生已有一段时间了”。

It is two years since I left school.
通过对现在完成时中的for和since知识点复习：八
年级上册英语的学习，是否已经掌握了本文知识点，更多参考资料尽在!。

since时态用法

since时态用法"Since" 是一个常用的连词，用于表示一个事件或时间点的起始，它可以用在不同的时态中，具体使用时需要根据上下文来确定。

以下是"since" 在不同时态中的用法：1.Present Perfect (现在完成时):●用于表示从过去某一时刻开始一直延续到现在的情况。

●I have been working here since 2010.●（我从2010年开始一直在这里工作。

）2.Simple Past (一般过去时):●在过去的某一时刻开始，一直持续到过去的某个时间点。

●She lived in Paris since she was a child until last year.●（她从小就住在巴黎，一直到去年。

）3.Present Perfect Continuous (现在完成进行时):●表示从过去某一时刻开始，一直延续到现在的动作或状态，强调持续性。

●He has been studying English since he arrived.●（他从到达这里开始一直在学习英语。

）4.Simple Present (一般现在时):●在描述时间状况的时候，"since" 通常与"for" 结合使用，表示一段时间。

●She has been working on the project since last Monday.●（她从上周一开始一直在进行这个项目。

）请注意，"since" 的使用通常与表示时间点或时间段的状语连用。

在不同的语境中，时态和结构可能会有所变化。

现在完成时中since和for的用法有何区别

现在完成时中since和for的用法有何区别由since和for构成的句子或短语是现在完成时的常用状语。

现就它们的用法作以下归纳。

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： 1. Mr. Smith has worked here since 1984. 1984年以来，史密斯先生一直在这工作。

2.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：1.We have known each other for twenty years. 我们认识有二十年了。

2.I haven’t seen her for a long time. 我好久没有见到她了。

三、习题(一）用since或for填空1. I have been waiting ____________ two hours.2. The woman has been playing with the dog __________ this morning.3. He has been learning a foreign language____________ eight months..4. Mr. Liu has been teaching in this school ____________ 1994.5. The telephone has been ringing _____________ two minutes.6. The man has been collecting shells ______________many years ago.7. I have been reading the novels _______________ yesterdays morning.8. It has been raining __________ late last night.9. My stomach has been aching__________ several days.10. The boys have been playing soccer ___________ the whole afternoon.11. The baby has been crying ____________ early this morning.12. The teachers have been sitting here ___________ we started about an hour ago.13. I have been playing tennis ___________ I was seven years old.Key:1. for2.since3.for4.since5.for6. since7.since8.since9.for 10,for11. since 12.since 13.since(二）短暂性转换延续性1.arrive 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 there1) 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 _________ __________.e/go back, return→be back come/go out →be out1) He came out two years ago.He _________ __________ _________ for __________ __________.2) We return to Fuzhou yesterday.We ________ ________ _________ to Fuzhou since __________.3.become→be1) I became a teacher in 2000.I ________ __________ a teacher for _________ _________.2) The river became dirty last year.The river _________ _________ dirty for _________ __________.4.close →be closed open →be open1) The shop closed two hours ago.The shop ________ _________ _________ for _________ _________.2) The door opened at six in the morning.The door ________ ________ ________ for six hours.5.get up→be up die→be deadleave sw. →be away from sw.fall asleep/get tot sleep→be asleepfinish/end→be over marry →be married1) 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 _________.6.start/begin to do sth. →do sth. begin →be on1) I began to teach at this school in 1995.I ____ ____ at this school since ____.2) The film began two minutes ago.The film ____ ____ ____ for ____ ____.7.borrow →keep lose→not havebuy →have put on→wearcatch/get a cold→have a coldget to know →know1) 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 _________ _________.8.have/has gone to →have been in1) He has gone to Beijing.He ____ ____ _____ Beijing for two days.9.join 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 army1) 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. （三）划线提问1) I have been there for two days.__________ _________ __________ you __________ __________ ?2) My father has lived here since 2000._________ _________ __________ your father _________ __________?3) He left here yesterday._________ ________ he _________ __________?4) They bought a book two hours ago.__________ ___________ they __________ a book Key:1.How long have ,been there2.How long has ,lived here3.When did ,leave here4.When did, buy。

since,for 和 ago 的用法区别习题(答案及解析)

Since 和 for 都可用于完成时，而 ago 只能用于过去时，其中 since 后面连接的是一个时间点，可以是一个具体的年月日或事件，而 for 后面连接的是一个时间段，不一定是确定的时间，但必须是一段时间。

从词性和连接时间来看，since 可以是介词、连词或副词，而 for 只是介词，ago 是副词，因此答题的关键是从时态和词性出发。

一、用 since，for 或 ago 完成下列的句子1、Claire is in Poland now. She has been there _____ two weeks.2、Claire has been in Poland _____ May and she is still there.3、Claire went to Poland two weeks _____.4、Matthew is studying in his room. He has been studying _____ 8 am.5、Matthew has been studying in his room _____ five hours.6、Matthew went to his room to study five hours _____.7、I know Charlie. We got acquainted fifteen years _____.8、I have known Charlie _____ fifteen years and he is my best friend.9、Charlie is my best friend. We have known each other _____ we were ten.10、I read this book a week _____.11、This book is fascinating. I have been reading it _____ a week now.12、This book is fascinating. I have been reading it _____ last week.13、I haven’t spoken to Kate _____ 2020.14、I spoke to Kate two years _____.15、I haven’t spoken to Kate _____ ages and I miss her.二、答案及解析1、for解析：与现在完成时连用时，for 接的是一个时间段，since 接的是一个时间点或事件，所以选for。

for 与since区别PPT课件

Since 和 for 的用法及区别：
一、since 的四种用法
1，since + 过去一个时间点（如具体的年、月、日
期、钟点、ago. 1990 , last month , half past six ）
I have been here since 1990.
1990起，我一直在这儿。
2、since+ 一段时间+ago
1.延续性动词可以用于现在完成时，其完成时态可与表示"段时间"
ቤተ መጻሕፍቲ ባይዱ
的状语连用。表示"段时间"的短语有：for two years, during the
past three years, since last year, how long 等
I have learned English since I came here. 自从我来到这儿就学
I have been here since five months ago。
自从五个月前，我已经在这儿了。
3、since+从句
Great Changes have taken place since you left.
自从你走后，已经发生了很大的变化。
4、It is +一段时间+since从句
It is two years since I became an English teacher.
英语了。
延续性动词不能与表示短暂时间的"点时间"状语连用。
如：It raind at eight yesterday morning . （误）
rain为延续性动词，而 at eight表示"点时间"，前后显然矛

since与for的区别

Since与 for的区别Since 用来说明动作起始时间，for用来说明动作延续时间长度。

I have lived here for more than twenty years.I have lived here since I was born..I have known Xiao Li since she was a little girl.My brother has been in the Youth League for two years.I have not heard from my uncle for a long time.注意：并非有for 作为时间状语的句子都用现在完成时。

I worked here for more than twenty years.(我现在已不在这里工作。

)I have worked here for many years.(现在我仍在这里工作。

)小窍门：当现在完成时+一段时间，这一结构中，我们用下面的公式转化，很容易就能排除非延续动词在完成时中的误使。

1) (对) Tom has studied Russian for three years.= Tom began to study Russian three years ago, and is still studying it now.2) (错) Harry has got married for six years.= Harry began to get married six years ago, and is still getting married now.显然，第二句不对，它应改为 Harry got married six years ago. 或 Harry has been married for six years.。

现在完成时态中already、yet、just、never、ever用法区别

现在完成时中already, yet, just, never, ever，since，for用法小节
序号
单词
说明
位置
1
already已经
1.用于陈述句中：
Shehas already found her bike.
2.用于疑问句：
表示期望得到肯定的回答或表示惊异
Has she found her bike already？
Ihave just had my lunch.
我刚吃完午饭。
在have/has后
4
never从未
用于否定句：
I’ve never been to Beijing.
我从未去过北京。
在have/has后
5
ever曾经
用于疑问句：
Have you ever been to Beijing?
你曾经去过北京吗？
她已经找到自行车了
在have/has后
2
yet还
用于否定句：
Ihaven’t found my ruler yet.
我还没找到我的尺子。
在句尾
yet已经
用于疑问句：
Have you found your ruler yet？
你已经找到尺子了吗？
①.句尾；
②.have/has后面
3
just刚才
用于陈述句：
3).since +从句-Englishsince she camehere.
她自从来这就教英语了。
7
for +一段时间
I have lived herefortwentyyears.
我在这里已经住了20年了。
在have/has后

Since-和-for-的用法及区别

Since-和-for-的用法及区别Since和for的用法及区别：一 ,since的四种用法1,since +过去一个时间点（如具体的年、月、日期、钟点、ago. 1990 , last month , half past sixI have been here since 1990. 1990起，我一直在这儿。

2，since+ 一段时间+agoI have been here since five months ago。

自从五个月前，我已经在这儿了。

3，since+从句GreatChanges have taken place since you left. 自从你走后，已经发生了很大的变化。

4，It is +一段时间+since从句It is two years since I became an English teacher.我成为英语老师有两年了。

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）,延续性动词和终止性动词的概念英语中，动词按其动作发生的方式、动作发生过程的长短，可分为延续性动词和终止性动词。

延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响。

如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay 等。

终止性动词也称非延续性动词、瞬间动词或短暂性动词, 表示不能延续的动作，这种动作发生后立即结束。

如open, close, finish, begin, come, go, arrive, reach, get to, leave, move, borrow,buy 等。

since和for的考点

高二必修5语法重点：现在完成时中for和since的用法。

现在完成时可以用来表示发生在过去某一时刻的,持续到现在的动作，状态（be 动词表示）常与for（+时间段）,since（+时间点或过去时的句子）连用.①for+时段为…时间I have been in the army for more than 5 years.我在部队已经呆了五年多了。

(动作开始于5年前，一直延续至今，有可能还要继续下去。

)②since+过去一个时间点（译为：自从……以来）He has lived here since 1978.自从1978年以来，他一直住在这儿。

(动作起始于1978年，一直住到现在，可能还要继续住下去。

)③since+时段+agoI've studied in this school____.A since three yearsB before three yearsC since three years agoD for three years ago※④since+从句（过去时）Great changes have taken place since you left.⑤It is+时段+since+从句（过去时）It is four years since my sister lived in Beijing. 我妹妹不在北京住有四年了。

It is five months since our boss was in Beijing.我们老板离开北京有五个月了。

●注：瞬间动词（buy,die,join,lose……）不能直接与for since 连用。

要改变动词。

洪洞县七中八年级英语下册Unit10I'vehadthisbikeforthreeyears单元语法

Her parents _______________ China ____ five years.
have been in
for
12．My father left home the day before yesterday.(用for
two days改写句子)
My father __________________home for two days. has been away from
B since 2016.
A．won't see B．haven't seen C．don't see D．didn't see
8．—How long_D___ you________ in Liping , Mr. Green? —Since last month. A．did ; come B．do; come C．have ; come D．have; been 9．(江西中考)Since we began to use the Internet, our lives __D__ a lot. A．change B．had changed C．will change D．have changed
Unit 10 I've had this bike for three years.
单元语法专题—Grammar Focus
现在完成时（三） ►since和for的区别 since和for都用于现在完成时中 , 其中since后面可接过去的时间点 , 也可接〞一段时间＋ago” , 还可以接从句 ; for后面只能接〞一段时间”。如: My parents have lived in this city since 2009.我的父母从2009年起就居住在这座城市。 She has been a doctor since two years ago.她从两年前就当医生了。 Lily has had the toy bear for two years.莉莉已经有这个玩具熊两年了。

(完整word)since 和 for 的用法

since 和for 的用法（用于现在完成时）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。

1. since ：a)。

since +时间点①年代②时刻数③一段时间+agob）。

现在完成时:主句(主语+have/has +延续性动词的过去分词）+ since +从句一般过去时c) It’s +时间段+since +短暂性动词的过去式d)。

时间段+has passed +since +短暂性动词的过去式for +一段时间练习：用since和for填空1） ______ two years 2) _______ two years ago 3) _______ last month4） ______ 1999 5） _______ yesterday 6）_______ 4 o’clock7） ______ 4 hours 8） _______ an hour ago 9） _______ we were children 10) _____ lunch time 11） ______ she left here12）. 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。

2。

for： for +一段时间= since +一段时间+ ago3。