Chapter 1-8: What is an Adverb?
An adverb can modify a verb, an adjective, another adverb, a phrase, or a clause. An adverb indicates frequency, manner, time, place, cause, or degree and answers questions such as "how," "when," "where," "why," "how much," "under what conditions," and "to what degree?"
While some adverbs can be identified by their characteristic "ly" suffix, most of them must be identified by untangling the grammatical relationships within the sentence or clause as a whole. Unlike an adjective, an adverb can be found in various places within the sentence. Adverbs always come before an adjective, but some adverbs come before the verb while other adverbs are placed after the verb. Never put an adverb between a verb and the direct object.