The document discusses the comparative form of adjectives in English. It explains that the comparative form is used to compare two things and always uses the preposition "than". For one-syllable adjectives, "-er" is added, and for words ending in consonant + y, the y is changed to i. For words ending in a vowel + consonant, the consonant is doubled. For adjectives with two or more syllables, "more" is used before the adjective. Examples are provided to illustrate each case.