Etymology: Middle English were (suppletive singular past subjunctive & 2d singular past indicative of been to be), weren (suppletive past plural of been ), from Old English wǣre (singular past subjunctive & 2d singular past indicative of wesan to be), wǣron (past plural indicative of wesan ), wǣren (past plural subjunctive of wesan ) — more at was
past second singular, past plural or past subjunctive of be