Types of irregular plural

Types of irregular plural

There are many types of irregular plural, but these are the most common:

 

Noun type
Forming the plural
Examples
Ends with -fe
Change f to v
then
Add -s
knife - knives
life - lives
wife - wives
Ends with -f
Change f to v
then
Add -es
half - halves
wolf - wolves
loaf - loaves
Ends with -o
Add -es
potato - potatoes
tomato - tomatoes
volcano - volcanoes
ends with -us
Change -us to -i
cactus - cacti
nucleus - nuclei
focus - foci
ends with -is
Change -is to -es
analysis - analyses
crisis - crises
thesis - theses
ends with -on
Change -on to -a
phenomenon - phenomena
criterion - criteria
ALL KINDS
Change the vowel
or
Change the word
or
Add a different ending
man - men
foot - feet
child - children
person - people
tooth - teeth
mouse - mice
Unchanging
Singular and plural
are the same
sheep
deer
fish (sometimes)
MR HAMZAOUI
 
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