Adverbs, like adjectives, have three degrees of comparison: positive, comparative and superlative which are formed in different ways:
- adverbs having just one syllable such as clean, high, low, etc. form the comparative and superlative the same way short adjectives do – adding -er (comparative) and –est (superlative) to the positive form.
eg. clean – cleaner – the cleanest
- adverbs that end in –ly take more (for comparative) and most (for superlative).
eg. happily – more happily – the most happily
The exception in this category is the adverb early (early – earlier – earliest).
Some adverbs are irregular, which means they change their form for comparative and superlative.
much – more – most
badly – worse – worst
well – better – best
little – less – least