Adverbs having the same forms as their adjectives add -er/-est
Adverbs: Two-sylable or adverbs ending in -ly take more/most
Irregular Forms
far - further = more - the furthestPositive- often/silentlyComparative- more often/more silentlyComparative- longer (than)far - farther = longer (in distance) -the farthestbad / badly - worse - the worstPositive- longgood / well - better- the bestmuch / many / a lot of -more -the mostSuperlative- (the)longestSuperlative- (the) most often/(the) most silently