With adverbs ending in -ly, use more for the comparative and most for the superlative.
|quietly||more quietly||most quietly|
|slowly||more slowly||most slowly|
|seriously||more seriously||most seriously|
- The teacher spoke more slowly to help us to understand.
- Could you sing more quietly please?
For short adverbs that do not end in -ly, comparative and superlative forms are the same as for adjectives: add -er for the comparative and -est for the superlative. If the adverb ends in e, remove it before adding the ending.
- Jim works harder than his brother.
- Everyone in the race ran fast, but John ran the fastest of all.
Some adverbs have irregular comparative forms.
- The little boy ran farther than his friends.
- You're driving worse today than yesterday !
- He played the best of any player.