I may grate you may grate he may grate we may grate you may grate they may grate
V-ing form
I may be grating you may be grating he may be grating we may be grating you may be grating they may be grating
Perfect
I may have grated you may have grated he may have grated we may have grated you may have grated they may have grated
V-ing perfect
I may have been grating you may have been grating he may have been grating we may have been grating you may have been grating they may have been grating
Negation
Simple form
I may not grate you may not grate he may not grate we may not grate you may not grate they may not grate
V-ing form
I may not be grating you may not be grating he may not be grating we may not be grating you may not be grating they may not be grating
Perfect
I may not have grated you may not have grated he may not have grated we may not have grated you may not have grated they may not have grated
V-ing perfect
I may not have been grating you may not have been grating he may not have been grating we may not have been grating you may not have been grating they may not have been grating
Interrogative form
Simple form
may I grate? may you grate? may he grate? may we grate? may you grate? may they grate?
V-ing form
may I be grating? may you be grating? may he be grating? may we be grating? may you be grating? may they be grating?
Perfect
may I have grated? may you have grated? may he have grated? may we have grated? may you have grated? may they have grated?
V-ing perfect
may I have been grating? may you have been grating? may he have been grating? may we have been grating? may you have been grating? may they have been grating?
Interro-negative form
Simple form
may I not grate? may you not grate? may he not grate? may we not grate? may you not grate? may they not grate?
V-ing form
may I not be grating? may you not be grating? may he not be grating? may we not be grating? may you not be grating? may they not be grating?
Perfect
may I not have grated? may you not have grated? may he not have grated? may we not have grated? may you not have grated? may they not have grated?
V-ing perfect
may I not have been grating? may you not have been grating? may he not have been grating? may we not have been grating? may you not have been grating? may they not have been grating?