Ever can add emphasis to the negative.
No one ever said that to me before.
Nothing ever happens in this place.
I never ever want to see that awful man again
We do not normally use ever in positive statements.
I always have lots to do. NOT I ever have lots to do.
Always, never and oftenin front position are emphatic.
Always the ghost appeared at the same time.
We can use always and never in instructions.
Never try to adjust the machine while it is switched on.