An adverb is a word that modifies the meaning of a verb, adjective, or other adverb. Some common types of adverbs include adverbs of time, frequency, place, manner, and degree. Adverbs of time indicate when something occurred, such as "yesterday." Adverbs of frequency show how often something happens, like "often." Adverbs of place specify where something takes place, such as "here." Adverbs of manner describe how something was done, for example "quickly." Adverbs of degree indicate the extent or amount, like "very." Adverbs can appear at the beginning, middle, or end of a sentence.