since的用法是什么？

since的用法是什么？~

since是什么意思？用法是什么？

since是什么意思？用法是什么？

since是一个从属连词，它可以引导时间状语从句｀原因状语从句和方式状语从句等，从句既可置于主句之前，亦可置于主句之后．
1．从属连词since引导时间状语从句，意谓＂自从......以来＂．since引导的时间状语从句有两种用法：
第一种是从句用现在完成时，从句用一般过去时，表过去某个时间开始直到现在．如：
How
long
has
it
been
since
you
wrote
to
your
sister?这句话的意思是:自从你上次写信给你妹妹,直到现在有多长时间了,强调的是过去你写信这个动作对现在的影响!
第二种是主句用过去完成时，从句用一般过去时或过去完成时，表过去某个时间知道过去某个时间．如：
（4）Since
she
came
to
me
,
we
had
been
happy
.
自从她来到我这里，我们一直很快活．
（5)
Two
weeks
had
passed
since
Martin
had
seen
him
.
自从马丁见到他以后，两周已经过去了．
since亦可用作介词．如：
（9）We
hadn't
seen
each
other
since
Oxford
.
我们自从牛津别后就彼此没有见过面．
(10)
I
have
not
heard
from
him
since
writing
last
.
自上次写信以后，我没接到过他的信．
How
long
is
it
since
you
wrote
to
your
sister?
since做介词,意思与第二句差不多,但是强调的重点还有语气不同!这句强调的是现在!
How
long
ago
did
you
write
to
your
sister?
这句强调的是多久前,比较好理解!意思是:你是多久前写信给你妹妹的!

It
was
3
years
since
they
got
married.
It
was
3
years
since
they
were
married.
没有区别gotwere在这个句子中都是系动词，只不过都是过去式，意思都是从他们结婚到现在有3年了
since的用法
后接表示过去的时间状语，或时间状语从句，和现在完成时态连用。译为自从。。。
I
have
studied
English
since
1995我从95年开始学英语。
Jane
has
been
away
from
London
since
she
hurt
his
leg.JANE从伤了腿后就离开了LONDON.
It
is
five
years
since
he
has
worked
in
the
company.他在这家公司工作三年了

since是什么意思？用法是什么？

since的用法有哪些

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余庆县19374443402： since的所有用法 - ？
范泉德宝：[答案] 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...

余庆县19374443402： since怎么使用. - ？
范泉德宝： 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.但如果只了解词的含义,而不了解其用法,在使用时就会造成错误.例如:I have not heard from him since I lived in Shanghai. 不少人会望文生义,将该句译为:“...

余庆县19374443402： since,有哪几种用法?? - ？
范泉德宝： ＂since＂的5种用法: 1.since+过去某时间点[指具体的年,月,日,时,星期几等] eg:he has beeb here since 1999 2.since+一段时间+ago eg:ha has been here since 5years ago 3.since+一般过去时的从句 eg:many things have changed since you left 4.it is/has been +一段时间+since+从句 eg:it is 2 years since i came here 5.it is +some time+since+从句 表示＂自从...以来,已经...时间了＂

余庆县19374443402： Since在现在完成时的用法? - ？
范泉德宝：[答案] 现在完成时态中since的用法1) since+过去一个时间点 (如具体的年、月、日期、钟点、 1980,last month,half past six).I have been here since 1989.2) since +一段时间+ ago I have been here since five months ago...

余庆县19374443402： 关于 SINCE 的全部用法 - ？
范泉德宝：[答案] 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...

余庆县19374443402： since的意义和用法 - ？
范泉德宝： since KK: [] DJ: [] ad.(常用于现在完成时或过去完成时) 1. 此后;从那时到现在 She left school three years ago and has worked as a nurse ever since. 她三年前毕业,从那时起便一直当护士. 2. 之前,以前 prep. 1. (常用于现在完成时或过去...

余庆县19374443402： since,有哪几种用法?请写出具体的用法,并举例! - ？
范泉德宝：[答案] ＂since＂的5种用法:1.since+过去某时间点[指具体的年,月,日,时,星期几等] eg:he has beeb here since 1999 2.since+一段时间+ago eg:ha has been here since 5years ago 3.since+一般过去时的从句 eg:many things hav...

余庆县19374443402： since的用法是什么,麻烦举些例句谢谢,为什么有的时候是完成时态,而有的时候是过去式的呢? - ？
范泉德宝：[答案] 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.但如果只了解词的含义,而不了解其用法,在使用时就会造成错误.例如:I have not heard from her since I lived in Qingdao.不少人会望文生义,...

余庆县19374443402： 英语翻译请问since的一些用法 还有翻译!我知道since 有以下用法1 since +过去时间点2 since+时段+ago3 since+从句4 It is +时段+since 我想问这四种用法... - ？
范泉德宝：[答案] 1.自从【过去时间点】以来2.自从【时段】前以来3.自从【从句内容】以来4.自从【since后面的内容】已经有【时段】了.满意的话别忘了采纳哦~谢谢.

余庆县19374443402： 介词 since 的用法? - ？
范泉德宝：[答案] (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...