good/well

better

best

bad 

worse

worst

little (amount)

less

least

little (size)

smaller

smallest

much / many

more

most

far (place + time)

further

furthest

far (place)

farther

farthest

late (time)

later

latest

near (place)

nearer

nearest

old (people and things)

older/elder

oldest/eldest

@mochizou

Happy            -> happier                  -> the happiest

Simple            -> simpler                  -> the simplest

Narrow           -> narrower               -> the narrowest

Clever             -> cleverer                 -> the cleverest

Good/well                  -> better                                 -> the best

Bad/ badly                 -> worse                                 -> the worst

Much/ many              -> more                                  -> the most

 a little/ little              -> less                                     -> the least 

far                               -> farther/ further                 -> the farthest/ furthest