usually in negatives or questionsat any time in the past, present, or futureIf you ever need any help, just let me know.
Was Desmond ever in the army?
have you ever done something?: Have you ever been to Cape Town?
hardly ever (=almost never): It hardly ever rains here in the summer.
rarely/seldom, if ever (=rarely and probably never): The method seldom, if ever, fails.