What is a noun?
A noun is a word that you only use for naming people, places, things, animals! It functions as a subject, object of a preposition.
Plural vs. Singular
Plural forms of a noun have usually an -s at the end of the word. But there is another irregular form that hasn´t got the -s at the end.
Ex:
| Singular | Plural |
|---|---|
| fish | fish |
| tooth | teeth |
| man | men |
| woman | women |