在since的从句中,有个原则必须得注意:
就是终止性动词和延续性动词的用法.
It's + 时间 + since +过去式.
如果那动词是延续性动词的话,那就从那动作结束后开始计时,因此,你所写出的句子含义是:我有五年不在那儿工作了.
再给几个例子:
Two years have passed since I last smoked.我戒烟有两年了.
How long is it since you were a league member?你退团多久了?