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.
Exercises:
Parts of speech: adverbs 1
Parts of speech: adverbs 2
All parts of speech 1
All parts of speech 2
Related topic:
Adjectives and adverbs