The document discusses comparative and superlative adjectives in English. Comparative adjectives are used to compare two things and are formed by adding -er or using more. Superlative adjectives compare one thing to a whole group and are formed by adding -est or using most. There are rules for forming comparatives and superlatives depending on the number of syllables in the adjective. Comparatives use than to indicate what is being compared, while superlatives do not require than.