Irregular plural

We form the regular plural of English nouns by adding -s or -es. For example: dog => dogs ; box => boxes etc.

Irregular plurals are exceptions to this general rule. Let's see the different types with their most common examples below.

1. Changing the vowel

singular	plural
man	men
woman	women
mouse	mice
louse	lice
foot	feet
tooth	teeth
goose	geese

2. Adding -(r)en

Child => children ; ox => oxen

3. Changing the last consonant

In most cases the change is from -f to -ves. For example: knife => knives.

singular	plural
calf	calves
half	halves
knife	knives
leaf	leaves
life	lives
loaf	loaves
shelf	shelves
thief	thieves
wife	wives