since

We’ve been waiting here since two o’clock..我们从两点钟开始就在这里等了。

I haven’t played rugby since I left university..我大学毕业后就没打过橄榄球。

She left London ten years ago, and I haven’t seen her since..她十年前离开伦敦，此后我再没有见过她。

The factory has been here since the 1970s..这家工厂从 20 世纪 70 年代起就在这里了。

It was exactly five years since her father had died..从她父亲去世到现在正好满五年。

Since the end of the war, over five thousand prisoners have been released..自从战争结束以后，已有五千多名战俘获释。

He lost his job five years ago, but has since found other work..他五年前失去工作，但此后找到了其他工作。

I left school in 1995, and since then I’ve lived in London..我 1995 年离开学校，此后就在伦敦生活。

About six thousand people were arrested, several hundred of whom have since been released..约六千人被逮捕，不过他们中有几百人后来被释放了。

ever since,adv. 从那时到现在

long since,很久以前；从前

since when,自什么时候起，打什么时候开始