may grate
Regular verb: grate - grated- grated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may grate
you may grate
he may grate
we may grate
you may grate
they may grate 	I may be grating
you may be grating
he may be grating
we may be grating
you may be grating
they may be grating	I may have grated
you may have grated
he may have grated
we may have grated
you may have grated
they may have grated	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 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't grate
you mayn't grate
he mayn't grate
we mayn't grate
you mayn't grate
they mayn't grate 	I mayn't be grating
you mayn't be grating
he mayn't be grating
we mayn't be grating
you mayn't be grating
they mayn't be grating	I mayn't have grated
you mayn't have grated
he mayn't have grated
we mayn't have grated
you mayn't have grated
they mayn't have grated	I mayn't have been grating
you mayn't have been grating
he mayn't have been grating
we mayn't have been grating
you mayn't have been grating
they mayn't have been grating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I grate?
may you grate?
may he grate?
may we grate?
may you grate?
may they grate? 	may I be grating?
may you be grating?
may he be grating?
may we be grating?
may you be grating?
may they be grating? 	may I have grated?
may you have grated?
may he have grated?
may we have grated?
may you have grated?
may they have grated? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I grate?
mayn't you grate?
mayn't he grate?
mayn't we grate?
mayn't you grate?
mayn't they grate? 	mayn't I be grating?
mayn't you be grating?
mayn't he be grating?
mayn't we be grating?
mayn't you be grating?
mayn't they be grating? 	mayn't I have grated?
mayn't you have grated?
mayn't he have grated?
mayn't we have grated?
mayn't you have grated?
mayn't they have grated? 	mayn't I have been grating?
mayn't you have been grating?
mayn't he have been grating?
mayn't we have been grating?
mayn't you have been grating?
mayn't they have been grating?