Plurals mean more than one.

Plural rules:

1. Most nouns become more than one by just adding an -s.

Example: dog - dogs ; friend - friends

2. Nouns ending with -sh ; -ch ; -x ; -s gets an -es in the plural form.

Example: box - boxes ; match - matches ; dress - dresses

3. Nouns that end with an -f / -fe, drop the -f and add -ves in the plural form.

Example: leaf - leaves ; thief - thieves ; knife - knives

4. Nouns that end with a -y, with a consonant in front of it, drop the y and add -ies.

Example: puppy - puppies ; lady - ladies

5. Nouns that end in a -y, with a vowel in front of it, you just add -s.

Example: monkey - monkeys

6. Some nouns stay the same as in the singular form.

Example: fruit, buck, sheep

7. Some nouns we use only in the plural form.

Example: measles, mumps, scissors, trousers

8. Some nouns changes completely in the plural form.

Example: ox - oxen ; mouse - mice ; child - children