Examples:
* Happy (adjective) -> Happily (adverb)
* Slow (adjective) -> Slowly (adverb)
* Quiet (adjective) -> Quietly (adverb)
Note: Not all adjectives can be turned into adverbs by adding "ily." Some adjectives already have adverb forms (e.g., "well," "badly"), and others require different suffixes or word changes.