ever since
ever since后面接表示过去的时间状语,或者从句,它所在的主句一般用现在完成时。如:
He has been abroad (ever) since he parted from me 自从他离开我后,他一直在海外
I';ve been doing this work (ever) since I retired 自从退休后我一直在做这工作
ever可以省略。
They have been very happy together ever since their marriage 自从他们结婚以来,他们一直快乐地生活在一起.