This paper considers Spanish adjectives and the possibility of converting some adjectives into adverbs, keeping the same general significance of a sentence. The conversion of an adjective into an adverb under these circumstances can be accomplished through a transformation which can be applied to a particular logical-semantic structure. The author establishes the formula for such a structure and the formula for the appropriate transformation. Particular types of adjectives and their potential convertibility into adverbs are discussed. (VM)