English verb conjugation
MAY RIB

Regular verb: rib - ribed - ribed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?