Here are the plural forms for each word on the list.
Left Column:
* potato →
potatoes
* goose →
geese
* person →
people
* fox →
foxes
* knife →
knives
* zoo →
zoos
* country →
countries
* peach →
peaches
* piano →
pianos
* army →
armies
* elf →
elves
* mouse →
mice
* child →
children
* tooth →
teeth
Right Column:
* match →
matches
* party →
parties
* class →
classes
* key →
keys
* foot →
feet
* deer →
deer
* box →
boxes
* holiday →
holidays
* copy →
copies
* fish →
fish (or fishes)
* guess →
guesses
* wish →
wishes
* cherry →
cherries
* woman →
women
Final Answer:
potatoes, geese, people, foxes, knives, zoos, countries, peaches, pianos, armies, elves, mice, children, teeth, matches, parties, classes, keys, feet, deer, boxes, holidays, copies, fish, guesses, wishes, cherries, women
Parent Tip: Review the logic above to help your child master the concept of y to ies words worksheet.