https://www.learnenglishfeelgood.com/sp/pasado-simple-ingles1.html
https://www.ejerciciosinglesonline.com/exercises-and-theory/primaria/
http://cp.principedonfelipe.boadilla.educa.madrid.org/?page_id=294
https://www.curso-ingles.com/practicar/ejercicios/past-simple
http://rinconcitodeprimaria.blogspot.com/2016/04/past-simple-regular-verbs.html
https://elbazardeprimaria.blogspot.com/2015/11/english-5.html
