the function of adverbs is to modify the action or event described by the verb by providing additional information about the manner in which it occurs.Many adverbs are derived from adjectives with the suffix-ly,but not all,and many speakers tend to omit the suffix in the most commonly used averbs.For example,in the phrase the woman walked quickiy the adverb quickly derived from the adjective quick describes the woman's way of walking Some commonly used adjectives have irregular adverbial forms,such as good which has the adverbial from well.