I may graft you may graft he may graft we may graft you may graft they may graft
V-ing form
I may be grafting you may be grafting he may be grafting we may be grafting you may be grafting they may be grafting
Perfect
I may have grafted you may have grafted he may have grafted we may have grafted you may have grafted they may have grafted
V-ing perfect
I may have been grafting you may have been grafting he may have been grafting we may have been grafting you may have been grafting they may have been grafting
Negation
Simple form
I may not graft you may not graft he may not graft we may not graft you may not graft they may not graft
V-ing form
I may not be grafting you may not be grafting he may not be grafting we may not be grafting you may not be grafting they may not be grafting
Perfect
I may not have grafted you may not have grafted he may not have grafted we may not have grafted you may not have grafted they may not have grafted
V-ing perfect
I may not have been grafting you may not have been grafting he may not have been grafting we may not have been grafting you may not have been grafting they may not have been grafting
Interrogative form
Simple form
may I graft? may you graft? may he graft? may we graft? may you graft? may they graft?
V-ing form
may I be grafting? may you be grafting? may he be grafting? may we be grafting? may you be grafting? may they be grafting?
Perfect
may I have grafted? may you have grafted? may he have grafted? may we have grafted? may you have grafted? may they have grafted?
V-ing perfect
may I have been grafting? may you have been grafting? may he have been grafting? may we have been grafting? may you have been grafting? may they have been grafting?
Interro-negative form
Simple form
may I not graft? may you not graft? may he not graft? may we not graft? may you not graft? may they not graft?
V-ing form
may I not be grafting? may you not be grafting? may he not be grafting? may we not be grafting? may you not be grafting? may they not be grafting?
Perfect
may I not have grafted? may you not have grafted? may he not have grafted? may we not have grafted? may you not have grafted? may they not have grafted?
V-ing perfect
may I not have been grafting? may you not have been grafting? may he not have been grafting? may we not have been grafting? may you not have been grafting? may they not have been grafting?