Adjective or Adverb? Purdue Online Writing Lab: Adjective or Adverb? Purdue University: Adjective or Adverb Adjective or Adverb Purdue OWL: How to Use Adjectives and Adverbs owl.english.purdue.edu Adjective or Adverb? Double negatives Universidade Purdue: adjetivo ou advérbio [em inglês] Purdue Online Writing Lab: ¿adjetivo o adverbio?