This document discusses the rules for forming comparative adjectives in English. Comparative adjectives are used to compare two things or people using "than." For one-syllable adjectives, add "-er"; for two-syllable adjectives ending in "-y," change the "-y" to "-ier"; and for other adjectives with two or more syllables, use "more" plus the adjective. Some adjectives like "good," "bad," and "far" have irregular comparative forms. The document provides examples of applying these rules.