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 2d singular, past plural, or past subjunctive ofbe