Buen Viaje 2 -10.4 Imperativo formal: formas irregulares pág. 303-305 (yo -car, -gar, -zar Familiar and Formal Commands_

Practice -car, -gar, -zar tú and Ud./Uds. commands - even though Buen Viaje doesn't have a specific quiz on this you will have it on your final - commands.