This document outlines 8 rules for forming plurals of nouns in English. The first rule states that most nouns form their plural by adding -s. The second rule explains that nouns ending in s, ss, ch, or x add -es. The third rule discusses changing y to i and adding -es for nouns ending in y preceded by a consonant. The remaining rules cover exceptions for forming plurals of nouns ending in o, f, fe, irregular plurals, and some nouns that are the same in both singular and plural form.