expire

The second example is a reference to a specific event.



I'll use your example in dialog:


"We do not need you anymore. You are a burden on our team. You are going to get us killed."

"I built this team. I got you in contact with our agents. You are here because of me."

"Your usefulness has long since expired."


( it means since the example of "usefulness" provided, much time has passed, and in that long period of time, the usefulness ended. )

1. What's Your 1st language? UK or US?

2. So does 'has long since expired' tell us the exact time it expired?

eg The usefulness has long expired since 2006.

Are they both correct?

-The sense of numb dread has settled on him since the arrival of the owl.
-He has died since the arrival of the owl.

I think the first one is correct but the second wrong, because the second one is saying the act of dying has happened repeatedly; am I correct?