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 may not rib
you may not rib
he may not rib
we may not rib
you may not rib
they may not rib 	I may not be ribing
you may not be ribing
he may not be ribing
we may not be ribing
you may not be ribing
they may not be ribing	I may not have ribed
you may not have ribed
he may not have ribed
we may not have ribed
you may not have ribed
they may not have ribed	I may not have been ribing
you may not have been ribing
he may not have been ribing
we may not have been ribing
you may not have been ribing
they may not 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 	
may I not rib?
may you not rib?
may he not rib?
may we not rib?
may you not rib?
may they not rib? 	may I not be ribing?
may you not be ribing?
may he not be ribing?
may we not be ribing?
may you not be ribing?
may they not be ribing? 	may I not have ribed?
may you not have ribed?
may he not have ribed?
may we not have ribed?
may you not have ribed?
may they not have ribed? 	may I not have been ribing?
may you not have been ribing?
may he not have been ribing?
may we not have been ribing?
may you not have been ribing?
may they not have been ribing?