https://www.123teachme.com/learn_spanish/spanish_negation_2
Spanish Negation Lessons
To make a Spanish statement or question negative, use "no" before the verb. See also Spanish negative words and double negatives.
spanish negationlessons
https://research.vu.nl/en/publications/neges-2018-workshop-on-negation-in-spanish/
Neges 2018: Workshop on negation in Spanish - Vrije Universiteit Amsterdam
vrije universiteit amsterdamin spanishworkshopnegation