Which type of change does this stem-changing verb make "costar"?
Which type of change does this stem-changing verb make "empezar"?
Which type of change does this stem-changing verb make "preferir"?
Which type of change does this stem-changing verb make "jugar"?
Which type of change does this stem-changing verb make "querer"?
Which type of change does this stem-changing verb make "morir"?
Which type of change does this stem-changing verb make "contar"?
Which type of change does this stem-changing verb make "repetir"?
Which type of change does this stem-changing verb make *"comenzar"?
Which type of change does this stem-changing verb make "dormir"?