What are the 7 rules of pluralization?

The seven rules of pluralization generally include:

1. Add -s: For most nouns, simply add -s (e.g., cat → cats).
2. Add -es: For nouns ending in -s, -x, -z, -sh, or -ch, add -es (e.g., box → boxes).
3. Change -y to -ies: For nouns ending in a consonant followed by -y, change -y to -ies (e.g., baby → babies).
4. Add -s to -y: For nouns ending in a vowel followed by -y, just add -s (e.g., key → keys).
5. Change -f or -fe to -ves: For some nouns ending in -f or -fe, change to -ves (e.g., leaf → leaves).
6. Irregular forms: Some nouns have completely irregular plural forms (e.g., man → men).
7. Same form for singular and plural: Some nouns remain the same in both forms (e.g., sheep → sheep).