Keeps; keeping; kept; the endurance of retention reflects the vitality of human obstinacy.  To retain, to own, to possess; in the present tense, present simple passive, present perfect passive, past perfect passive, present modal, past modal, and a dozen other forms of grammatical conundrums.  It is the action of owning, maintaining or  possessing; often, with implications of forceful protectiveness despite demands of rightful ownership by third parties.  “He kept it!”  “He keeps coming back!” […]