"his students followed him like sheep"
误 A lot of cows and sheeps died of polluted water.
正 A lot of cows and sheep died of polluted water.
田野里有一群羊。误 There are a flock of sheeps in the field.
正 There are a flock of sheep in the field.
析sheep的单复数同形,构成复数时词尾不加s。
