Lesson 1: Verbs With an Irregular "Yo" Form

http://www.youtube.com/watch?v=wrLgn9Kg_XI

Lesson 2: Verbs with an Irregular "Yo" Form

http://www.youtube.com/watch?v=jYK978bRvG8

Lesson 3: Verbs With an Irregular "Yo" Form

http://www.youtube.com/watch?v=cBnXt_qfbgE