She never sleeps.(correct, simple present) She never sleep.(wrong, she never follows v1) She never slept.(correct, simple past) I never live. (correct, simple present) I never lived.(correct, simple past) He never loves.(correct, simple present) He never love. (wrong, he never follows v1) He never loved me.(correct, simple past) Never happen/happened.(both are correct) He/she/it/any name are followed by verb form5(v5). I/we/you/they are followed by verb form1(v1). sleep(v1) slept(v2) slept(v3) sleeping(v4) sleeps(v5)