The document discusses different types of comparisons: comparisons of inequality, superiority, equality, and inferiority. It provides examples of how to form comparisons using adjectives and comparative and superlative forms. For comparisons of inequality, longer adjectives use "more" and shorter adjectives add "-er". Superiority comparisons add "-est" or use "the most". Equality comparisons use "as...as". Inferiority comparisons add "less". Exercises provide examples of forming comparisons using these structures.