In general, comparative and superlative forms of adverbs are the same as for adjectives:
- add -er or -est to short adverbs:
- Jim works harder than his brother.
- Everyone in the race ran fast, but John ran the fastest of all.
With adverbs ending in -ly, use more for the comparative and most for the superlative:
- The teacher spoke more slowly to help us to understand.
- Could you sing more quietly please?
Some adverbs have irregular comparative forms:
- The little boy ran further than his friends.
- You’re driving worse today than yesterday !
BE CAREFUL! Sometimes ‘most‘ can mean ‘very’:
- We were most grateful for your help
- I am most impressed by this application.