I may sketch you may sketch he may sketch we may sketch you may sketch they may sketch
V-ing form
I may be sketching you may be sketching he may be sketching we may be sketching you may be sketching they may be sketching
Perfect
I may have sketched you may have sketched he may have sketched we may have sketched you may have sketched they may have sketched
V-ing perfect
I may have been sketching you may have been sketching he may have been sketching we may have been sketching you may have been sketching they may have been sketching
Negation
Simple form
I may not sketch you may not sketch he may not sketch we may not sketch you may not sketch they may not sketch
V-ing form
I may not be sketching you may not be sketching he may not be sketching we may not be sketching you may not be sketching they may not be sketching
Perfect
I may not have sketched you may not have sketched he may not have sketched we may not have sketched you may not have sketched they may not have sketched
V-ing perfect
I may not have been sketching you may not have been sketching he may not have been sketching we may not have been sketching you may not have been sketching they may not have been sketching
Interrogative form
Simple form
may I sketch? may you sketch? may he sketch? may we sketch? may you sketch? may they sketch?
V-ing form
may I be sketching? may you be sketching? may he be sketching? may we be sketching? may you be sketching? may they be sketching?
Perfect
may I have sketched? may you have sketched? may he have sketched? may we have sketched? may you have sketched? may they have sketched?
V-ing perfect
may I have been sketching? may you have been sketching? may he have been sketching? may we have been sketching? may you have been sketching? may they have been sketching?
Interro-negative form
Simple form
may I not sketch? may you not sketch? may he not sketch? may we not sketch? may you not sketch? may they not sketch?
V-ing form
may I not be sketching? may you not be sketching? may he not be sketching? may we not be sketching? may you not be sketching? may they not be sketching?
Perfect
may I not have sketched? may you not have sketched? may he not have sketched? may we not have sketched? may you not have sketched? may they not have sketched?
V-ing perfect
may I not have been sketching? may you not have been sketching? may he not have been sketching? may we not have been sketching? may you not have been sketching? may they not have been sketching?