may rib
Regular verb: rib - ribed- ribed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may rib
you may rib
he may rib
we may rib
you may rib
they may rib 	I may be ribing
you may be ribing
he may be ribing
we may be ribing
you may be ribing
they may be ribing	I may have ribed
you may have ribed
he may have ribed
we may have ribed
you may have ribed
they may have ribed	I may have been ribing
you may have been ribing
he may have been ribing
we may have been ribing
you may have been ribing
they may have been ribing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't rib
you mayn't rib
he mayn't rib
we mayn't rib
you mayn't rib
they mayn't rib 	I mayn't be ribing
you mayn't be ribing
he mayn't be ribing
we mayn't be ribing
you mayn't be ribing
they mayn't be ribing	I mayn't have ribed
you mayn't have ribed
he mayn't have ribed
we mayn't have ribed
you mayn't have ribed
they mayn't have ribed	I mayn't have been ribing
you mayn't have been ribing
he mayn't have been ribing
we mayn't have been ribing
you mayn't have been ribing
they mayn't have been ribing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I rib?
may you rib?
may he rib?
may we rib?
may you rib?
may they rib? 	may I be ribing?
may you be ribing?
may he be ribing?
may we be ribing?
may you be ribing?
may they be ribing? 	may I have ribed?
may you have ribed?
may he have ribed?
may we have ribed?
may you have ribed?
may they have ribed? 	may I have been ribing?
may you have been ribing?
may he have been ribing?
may we have been ribing?
may you have been ribing?
may they have been ribing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I rib?
mayn't you rib?
mayn't he rib?
mayn't we rib?
mayn't you rib?
mayn't they rib? 	mayn't I be ribing?
mayn't you be ribing?
mayn't he be ribing?
mayn't we be ribing?
mayn't you be ribing?
mayn't they be ribing? 	mayn't I have ribed?
mayn't you have ribed?
mayn't he have ribed?
mayn't we have ribed?
mayn't you have ribed?
mayn't they have ribed? 	mayn't I have been ribing?
mayn't you have been ribing?
mayn't he have been ribing?
mayn't we have been ribing?
mayn't you have been ribing?
mayn't they have been ribing?