How to form plural nouns:
* Regular plurals: Add "-s" to the end of the singular noun.
* Examples: cat - cats, book - books, chair - chairs
* Irregular plurals: These have unique forms that don't follow the standard "-s" rule.
* Examples: child - children, mouse - mice, man - men
* Nouns ending in "-s", "-x", "-ch", "-sh" or "-z": Add "-es" to the end.
* Examples: bus - buses, box - boxes, church - churches, dish - dishes, buzz - buzzes
* Nouns ending in "-y" preceded by a consonant: Change the "-y" to "-ies".
* Examples: baby - babies, story - stories, fly - flies
* Nouns ending in "-y" preceded by a vowel: Add "-s" to the end.
* Examples: toy - toys, boy - boys, monkey - monkeys
* Nouns ending in "-f" or "-fe": Change the "-f" or "-fe" to "-ves".
* Examples: knife - knives, wife - wives, wolf - wolves
* Compound nouns: Make the most important noun plural.
* Examples: toothbrush - toothbrushes, boyfriend - boyfriends, passer-by - passers-by
* Uncountable nouns: These don't have plural forms, as they refer to concepts or substances.
* Examples: water, happiness, information, furniture
Examples of plural nouns:
* People: children, teachers, families, friends
* Things: books, cars, flowers, computers
* Concepts: ideas, theories, opinions, beliefs
Let me know if you have any more questions about plural nouns!