Adverbs can modify verbs, adjectives, other adverbs, and clauses. They provide information about manner, place, time, frequency, certainty, degree, and other circumstances. There are several types of adverbs, including adverbs of manner, place, frequency, time, purpose, certainty, and degree. The position of adverbs can vary depending on what they modify and their type, with time and manner adverbs usually coming at the end of a sentence. Adverbs follow a general order of manner, place, frequency, time, purpose when used together.