1.自…以后；从…以来from a time in the past until a later past time, or until now
She's been off work since Tuesday.星期二以来她一直没上班。
We've lived here since 2006.从 2006 年开始我们便住在这里。
I haven't eaten since breakfast.早饭以后我还没吃过东西呢。
He's been working in a bank since leaving school.他中学毕业以后一直在一家银行工作。
Since the party she had only spoken to him once.那次聚会以后，她只和他说过一次话。
‘They've split up.’ ‘ Since when? ’“他们分手了。”“什么时候的事儿？”
That was years ago. I've changed jobs since then .那是多年以前的事了。自那以来我已经换过几个工作了。
2.~ when?（表示气愤）何曾，什么时候used when you are showing that you are angry about sth
Since when did he ever listen to me?他什么时候听过我的话？
1.从…以后；自…以来from an event in the past until a later past event, or until now
Cath hasn't phoned since she went to Berlin.卡思自从去了柏林还没有打来过电话。
It was the first time I'd had visitors since I'd moved to London.那是我搬到伦敦以后第一次有人来看我。
It's twenty years since I've seen her.我已经二十年没见她了。
How long is it since we last went to the theatre?我们多久没去看戏了？
She had been worrying ever since the letter arrived.自从接到那封信后她就一直焦虑不安。
2.因为；由于；既然because; as
We thought that, since we were in the area, we'd stop by and see them.我们想，既然到了这个地方，就该顺便去看看他们。
1.自…以后；从…以来from a time in the past until a later past time, or until now
He left home two weeks ago and we haven't heard from him since.他两周前离家外出，我们至今还没有他的音信。
The original building has long since(= long before now) been demolished.原来的建筑老早就拆了。
2.此后；后来at a time after a particular time in the past
We were divorced two years ago and she has since remarried.我们两年前离了婚，之后她又再婚了。
Thus three-quarters of all the foreign currency reserves accumulated since the beginning of time have been piled up in this decade.
因此，有史以来累积的所有外汇储备，有四分之三是最近10年内积累起来的。
Since time has such different meanings in different cultures, communication is often difficult.
因为时间对于不同文化背景的人有如此多的不同的意义，相互间的交流常常会很困难。
Technically it was the first full year since the end of the Great Recession.
从技术上讲，这是大萧条结束后的第一个完整年度。
But since the monopoly is no more efficient than I am, it is losing just as much money per unit sold.
但是因为这个垄断巨头并不比我生产效率更高，它每一份产品所损失的钱和我一样多。
It had to be withdrawn a few weeks later as it was causing serious neurological problems. Science has moved on since then, you may say.
由于造成了严重的神经系统的问题，疫苗只好在几个星期之后回收。
We used to be faithful about it, but since Father went away and all this war trouble unsettled us, we have neglected many things.
以前我们对此就无比虔诚，可是自从爸爸离开之后，又加上我们受到了这场战争的困扰，很多事情我们都忘到脑后了。
He had words with his girlfriend last week and he had not spoken to her since.
上星期他和他的女朋友吵嘴，到现在还没有和她讲话。
"I've not had any pain since the surgery and I'm taking it step by step but it's gradually getting back to normal, " she said.
她说道，“自从手术后，我早已没有任何疼痛的感觉并且我正一步步来接受它，但是渐渐地我已经回到正常的生活上了。”
Since the new century, begin with the "The Blue Gate Crossing" , there have been a lot of Taiwan youth movie with similar subject and style.
新世纪以来，以《蓝色大门》为发端，台湾影坛出现了一批题材、风格类似的青春片。
Fabianski is enjoying the best form of his Arsenal career since his run in the side began in the return fixture in September.
从九月上位开始，法比安斯基正享受着他在阿森纳的最美好的时光。
She is so remarkable because since gondoliers took to the waterways of Venice in 1094, there had never been a woman among them.
博斯科洛之所以令人侧目，是因为自从1094年威尼斯水路上出现船夫以来，还从来没有过女性撑船人。
The Somme affair, destined to be known as the Great F--k Up, was the largest engagement fought since the beginning of civilization.
注定要被作为一大糟糕战事的索姆河战役，是自文明开始以来最大的交战。
Miliband said he believed nine local staff had been detained, although four had since been released.
米利班说，他相信有九名当地雇员被捕，尽管后来已经有四名获释。
The economic value of a good or service has puzzled economists since the beginning of the discipline.
从这个学科的诞生之日起，商品和服务的经济价值就让经济学家们感到很困惑。
And with first-quarter GDP growth of 3. 2%, the economy has recovered all the ground it had lost since the fourth quarter of 2007.
随着今年第一季度GDP3.2%的增长，经济终于收复了2007年四季度以来所有的失地。
but since the porter agreed with him, she rang up her daughter and asked for her help in what she described as a little spot of bother.
但既然看门人也同意他的意见，她只得打电话向女儿求援，说她碰到了一点儿小麻烦。
Japanese Prime Minister Yasuo Fukuda may carry out his first cabinet reshuffle since taking office in a bid to increase his political clout.
据日本媒体报道，日本首相福田康夫可能将于28日进行上台以来的首度内阁改组，以增加自己在政坛的影响力。
Without these, materials would not exist, since they are predominately sensed by means of these five senses.
没有这些，材料将不存在，因为他们大多采用这种感觉的五种感官。
Since cloning is not yet ready to be made accessible, by any means, to the general public, it is not yet a major issue to politicians.
由于克隆尚未准备好了访问，以任何方式，向广大公众，这还不是一个大问题的政治家。
An Israeli official said the rampage marked a further deterioration of diplomatic ties between Israel and Egypt since the fall of Mubarak.
一位以色列官员称这一事件让自从穆巴拉克下台以来一直恶化的以埃关系雪上加霜。
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