Rule

Example

Exception

Nouns ending in -f and -fe: -f /-fe+ v + -es

wolf - [ ]

[ ] - calves

roof - [ ]

Nouns ending in -o: +-es

potato - [ ]

hero - [ ]

radio - [ ]

piano - [ ]

Nouns that change a lot

foot - [ ]

tooth - [ ]

goose - geese

man - men

louse - [ ]

ox - [ ]

child - children

person - [ ]

Nouns that do NOT Change

deer - deer

moose - moose

Nouns that have two forms

fish - fish / fishes

buffalo - buffalo / buffaloes

shrimp - shrimp / [ ]

trout - [ ] / trouts