1) A worksheet explaining the -CAR, -GAR, ZAR spelling changes in the YO form of the preterit.
2) 10 questions using these verbs where student responds in YO form.
3) After finishing exercise, student A asks partner orally the odds. Partner B then asks the evens. They both write the answers in 3rd person.
This exercise emphasizes the fact that the spelling changes only apply to the YO form of the Preterit conjugation of these types of verbs.
It is both a written and oral exercise.