abler and ablest.
John is abler than Mary at driving.
Max is the ablest student in the class when it comes to science.
Adjectives ending in -able are base forms. E. g.,fashion+able - > comparative: more fashionable -> superlative: (the)most fashionable.
"Higher" is the comparative of high. The superlative is highest.
lazier and laziest
abler, ablest
'Next' is a superlative; it means 'nearest'. The positive is therefore 'near' and the comparative is 'nearer'.
harmful
last
desire-able and desireabler
abler, ablest
abler, ablest
easier and easiest
The comparative form of rude is ruder, and the superlative form is rudest. It is common to form the comparative and superlative of short words like this by adding -er and -est.