Buen Viaje 2 -10.4 Imperativo formal: formas irregulares pág. 303-305 Irregular Formal Commands (introducir and conocer are not considered irregulars, but they have unusual yo forms and that is why they are included in this list) Tools See a list of terms used in this activity. Activity created by: Sra. Soares This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.