Spanish Free Lessons Online – Lesson 40 – Cuándo y Cuando (when and when) By Rodrigo Ferreira - January 27, 2014 0 575 Share on Facebook Tweet on Twitter In our video lesson #40 we will learn the difference between “cuando” and “cuándo” (with a “´” or tilde). Try to catch the Spanish pronunciation, and don’t forget to practice repeating the same words and sounds.