I may know you may know he may know we may know you may know they may know
V-ing form
I may be knowing you may be knowing he may be knowing we may be knowing you may be knowing they may be knowing
Perfect
I may have known you may have known he may have known we may have known you may have known they may have known
V-ing perfect
I may have been knowing you may have been knowing he may have been knowing we may have been knowing you may have been knowing they may have been knowing
Negation
Simple form
I may not know you may not know he may not know we may not know you may not know they may not know
V-ing form
I may not be knowing you may not be knowing he may not be knowing we may not be knowing you may not be knowing they may not be knowing
Perfect
I may not have known you may not have known he may not have known we may not have known you may not have known they may not have known
V-ing perfect
I may not have been knowing you may not have been knowing he may not have been knowing we may not have been knowing you may not have been knowing they may not have been knowing
Interrogative form
Simple form
may I know? may you know? may he know? may we know? may you know? may they know?
V-ing form
may I be knowing? may you be knowing? may he be knowing? may we be knowing? may you be knowing? may they be knowing?
Perfect
may I have known? may you have known? may he have known? may we have known? may you have known? may they have known?
V-ing perfect
may I have been knowing? may you have been knowing? may he have been knowing? may we have been knowing? may you have been knowing? may they have been knowing?
Interro-negative form
Simple form
may I not know? may you not know? may he not know? may we not know? may you not know? may they not know?
V-ing form
may I not be knowing? may you not be knowing? may he not be knowing? may we not be knowing? may you not be knowing? may they not be knowing?
Perfect
may I not have known? may you not have known? may he not have known? may we not have known? may you not have known? may they not have known?
V-ing perfect
may I not have been knowing? may you not have been knowing? may he not have been knowing? may we not have been knowing? may you not have been knowing? may they not have been knowing?