sheep的复数形式是：sheep。sheep是单复数同形，意思是：羊，绵羊；胆小鬼。短语。1、black sheep 败家子，害群之马。2、lost sheep 迷途羔羊。3、sheep and goats 善人与恶人。例句：Sheep were grazing in the fields.羊在野地里吃草。