Adverbs are words used to modify verbs. Most of them end in –ly.Place words and time words are all adverbs. Adverbs may also modify adjectives or other adverbs. An adverb that modifies an adjective or another adverb usually goes before that adjective or adverb.
Example:
1. She sings well.(The adverb 'well' modifies the word 'sings'.)