-s: a dolphin - dolphins, a dress - dresses, a shoe - shoes, a cake - cakes, a sandwich - sandwiches, a toy - toys, a fox - foxes, a garden - gardens, a ray - rays, a piano - pianos, a coin - coins, an ability - abilities. -es: a branch - branches, a wish - wishes. -ies: a fly - flies, a diary - diaries, a strawberry - strawberries, an enemy - enemies.