may vault
Regular verb: vault - vaulted- vaulted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may vault
you may vault
he may vault
we may vault
you may vault
they may vault 	I may be vaulting
you may be vaulting
he may be vaulting
we may be vaulting
you may be vaulting
they may be vaulting	I may have vaulted
you may have vaulted
he may have vaulted
we may have vaulted
you may have vaulted
they may have vaulted	I may have been vaulting
you may have been vaulting
he may have been vaulting
we may have been vaulting
you may have been vaulting
they may have been vaulting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't vault
you mayn't vault
he mayn't vault
we mayn't vault
you mayn't vault
they mayn't vault 	I mayn't be vaulting
you mayn't be vaulting
he mayn't be vaulting
we mayn't be vaulting
you mayn't be vaulting
they mayn't be vaulting	I mayn't have vaulted
you mayn't have vaulted
he mayn't have vaulted
we mayn't have vaulted
you mayn't have vaulted
they mayn't have vaulted	I mayn't have been vaulting
you mayn't have been vaulting
he mayn't have been vaulting
we mayn't have been vaulting
you mayn't have been vaulting
they mayn't have been vaulting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I vault?
may you vault?
may he vault?
may we vault?
may you vault?
may they vault? 	may I be vaulting?
may you be vaulting?
may he be vaulting?
may we be vaulting?
may you be vaulting?
may they be vaulting? 	may I have vaulted?
may you have vaulted?
may he have vaulted?
may we have vaulted?
may you have vaulted?
may they have vaulted? 	may I have been vaulting?
may you have been vaulting?
may he have been vaulting?
may we have been vaulting?
may you have been vaulting?
may they have been vaulting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I vault?
mayn't you vault?
mayn't he vault?
mayn't we vault?
mayn't you vault?
mayn't they vault? 	mayn't I be vaulting?
mayn't you be vaulting?
mayn't he be vaulting?
mayn't we be vaulting?
mayn't you be vaulting?
mayn't they be vaulting? 	mayn't I have vaulted?
mayn't you have vaulted?
mayn't he have vaulted?
mayn't we have vaulted?
mayn't you have vaulted?
mayn't they have vaulted? 	mayn't I have been vaulting?
mayn't you have been vaulting?
mayn't he have been vaulting?
mayn't we have been vaulting?
mayn't you have been vaulting?
mayn't they have been vaulting?