Regular Pluralization:
* Adding -s: cats, dogs, books, chairs, tables
* Adding -es: boxes, buses, churches, glasses, kisses
* Adding -ies: babies, berries, countries, stories, flies
Irregular Pluralization:
* Changing the vowel: men, women, children, teeth, feet
* Adding -en: oxen, children
* No change: sheep, fish, deer, series, species
* Unique forms: mice, geese, lice
Compound Nouns:
* Pluralizing the main noun: boyfriends, girlfriends, toothbrushes, sunglasses
* Pluralizing both parts: women doctors, men teachers, mothers-in-law
Nouns with no plural form:
* Abstract nouns: love, happiness, knowledge, information
* Mass nouns: water, rice, sand, music
Nouns with a special plural form:
* Data (singular), data (plural)
* Media (singular), media (plural)
* Agenda (singular), agendas (plural)
* Criteria (plural), criterion (singular)
These are just a few examples. There are many more ways to form plural nouns in English, and the rules can be complex. It's important to consult a dictionary if you are unsure about the plural form of a particular noun.