Adverbs ending in -ly use more to form the comparative and most to form 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?
Adverbs that don't end in -ly form the comparative and the superlative in the same way as adjectives: they take and ending of -er for the comparative and -est for the superlative. If an adverb ends in e you first have to remove the e then add the ending.
- Jim works harder than his brother.
- Everyone in the race ran fast, but John ran the fastest of all.
A few adverbs have irregular comparative and superlative forms.
- The little boy ran farther than his friends.
- You're driving worse today than yesterday !
- He played the best of any player.