Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may curb curb you may curb curb he may curb curb we may curb curb you may curb curb they may curb curb
V-ing form
I may be curb curbing you may be curb curbing he may be curb curbing we may be curb curbing you may be curb curbing they may be curb curbing
Perfect
I may have curb curbed you may have curb curbed he may have curb curbed we may have curb curbed you may have curb curbed they may have curb curbed
V-ing perfect
I may have been curb curbing you may have been curb curbing he may have been curb curbing we may have been curb curbing you may have been curb curbing they may have been curb curbing
Negation
Simple form
I may not curb curb you may not curb curb he may not curb curb we may not curb curb you may not curb curb they may not curb curb
V-ing form
I may not be curb curbing you may not be curb curbing he may not be curb curbing we may not be curb curbing you may not be curb curbing they may not be curb curbing
Perfect
I may not have curb curbed you may not have curb curbed he may not have curb curbed we may not have curb curbed you may not have curb curbed they may not have curb curbed
V-ing perfect
I may not have been curb curbing you may not have been curb curbing he may not have been curb curbing we may not have been curb curbing you may not have been curb curbing they may not have been curb curbing
Interrogative form
Simple form
may I curb curb? may you curb curb? may he curb curb? may we curb curb? may you curb curb? may they curb curb?
V-ing form
may I be curb curbing? may you be curb curbing? may he be curb curbing? may we be curb curbing? may you be curb curbing? may they be curb curbing?
Perfect
may I have curb curbed? may you have curb curbed? may he have curb curbed? may we have curb curbed? may you have curb curbed? may they have curb curbed?
V-ing perfect
may I have been curb curbing? may you have been curb curbing? may he have been curb curbing? may we have been curb curbing? may you have been curb curbing? may they have been curb curbing?
Interro-negative form
Simple form
may I not curb curb? may you not curb curb? may he not curb curb? may we not curb curb? may you not curb curb? may they not curb curb?
V-ing form
may I not be curb curbing? may you not be curb curbing? may he not be curb curbing? may we not be curb curbing? may you not be curb curbing? may they not be curb curbing?
Perfect
may I not have curb curbed? may you not have curb curbed? may he not have curb curbed? may we not have curb curbed? may you not have curb curbed? may they not have curb curbed?
V-ing perfect
may I not have been curb curbing? may you not have been curb curbing? may he not have been curb curbing? may we not have been curb curbing? may you not have been curb curbing? may they not have been curb curbing?