Degrees of Comparison (Adjectives)

Every descriptive adjective in English can express three degrees of comparison: the positive degree (the base form), the comparative degree (for comparing two items), and the superlative degree (for singling out one item among three or more). The progression from strong to stronger to strongest is one of the first patterns a learner masters, yet the rules for forming these degrees are more varied than they first appear.

For short adjectives of one syllable, the comparative adds -er and the superlative adds -est: tall → taller → tallest. If the adjective ends in a single vowel followed by a single consonant, you double that consonant before adding the suffix: big → bigger → biggest, hot → hotter → hottest. If it ends in a consonant plus -y, change the -y to -i first: happy → happier → happiest. These spelling rules prevent awkward vowel sounds and keep the pronunciation predictable.

For longer adjectives of three or more syllables, and for many two-syllable adjectives (especially those ending in -ful, -less, -ing, or -ed), English switches to a periphrastic strategy: place more before the adjective for the comparative and most before it for the superlative. Beautiful → more beautiful → most beautiful; careful → more careful → most careful. Never combine both strategies—more bigger is ungrammatical, a classic learner error worth actively guarding against.

A handful of the most common adjectives are entirely irregular and must be memorised: good → better → best, bad → worse → worst, far → farther / further, little → less → least, much / many → more → most. Because these words appear so frequently in everyday speech, incorrect forms like gooder or baddest stand out sharply to native listeners. For deeper treatment of each degree, see Comparative Adjectives and Superlative Adjectives.