Singular

Plural

adding ‘S’

Boy

Boys

Photo

Photos

Piano

Pianos

adding ‘es’

Brush

Brushes

Box

Boxes

Mosquito

Mosquitoes

changing ‘y’ into ‘ies’

Baby

Babies

Lady

Ladies

City

Cities

changing ‘f’ into ‘ves’

Wife

Wives

Life

Lives

Leaf

Leaves

changing the vowel

Man

Men

Foot

Feet

Tooth

Teeth

same spelling

Deer

Fish

News