IRREGULAR NOUNS

AULA INVERSA

OBSERVA CÓMO CAMBIAN ALGUNOS NOMBRES AL PONERLOS EN PLURAL, REALIZA LAS ANOTACIONES NECESARIAS Y PREGÚNTALAS EN LA PRÓXIMA CLASE A TU MAESTRO 

Types of irregular plural

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

Noun type	Forming the plural	Example
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)