The document provides rules for making nouns plural in English. It states that most nouns form the plural by adding -s, while some nouns ending in certain letters like -s, -sh, -ch, -x, or -o add -es instead. Some nouns ending in consonant-y or -f/-fe change the ending to -ies or -ves. It notes there are also irregular nouns that have unpredictable plural forms, like child/children and mouse/mice. The document tests applying the rules to example nouns.