This document provides rules for using articles (a, an, the) in English sentences. It discusses when to use articles with countable nouns, singular vs. plural nouns, proper nouns, uncountable nouns, names of countries, languages, meals, years, days, and possessives. Examples are given for each rule and practice exercises provide opportunities to apply the rules by identifying whether sentences are true or false and correcting incorrect ones. Key aspects covered include using articles before adjectives when a countable noun follows, and not using articles in certain cases like with uncountable nouns, names, or possessives.