
Examples:
1. The boy walked slowly.
Adverb 'slowly' shows how the boy 'walked' (verb).
2. The teacher spoke very rudely.
Adverb 'very' tells more about adverb 'rudely'.
3. The queen is really kind.
Adverb 'really' tells more about adjective 'kind'.
Adverbs also have degrees of comparison same like the adjectives.