An irregular plural noun is a little different than regular nouns. You don’t simply just add -s or -es. In this video, we will explore four different types of irregular plural nouns. 

- Nouns that end in -f and -fe 

- Nouns that change vowels in the middle 

- Nouns that change in spelling greatly 

- Nouns that do not change at all

https://youtu.be/eab2rFbtCZ0?si=iQl2r4kO8fjekrjF