An adverb is a word used to modify, or qualify, a verb (or verbal), an adjective, or another adverb. It usually answers one of these questions: When? Where? How? Why? Under what conditions? To what degree?
Adverbs modifying adjectives or other adverbs usually intensify or limit the intensity of the word they modify.
The negators not and never are classified as adverbs.
Exercise: Parts of speech: adverbs 1
Exercise: Parts of speech: adverbs 2
Exercise: All parts of speech 1
Exercise: All parts of speech 2
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Adjectives and adverbs
verb A word that expresses action (jump, think) or being (is, was, seems). A sentence's verb is composed of a main verb possibly preceded by one or more helping verbs.
verbal A verb form that functions as a noun or an adjective, not as the main verb of a clause. Verbals include infinitives (to sing), present participles (singing), and past participles (sung).
adjective A word that modifies or describes a noun or pronoun: lame, old, rare, beautiful; also the articles a, an, the.