English verb conjugation
CAN RIBBOR

Regular verb: ribbor - ribbored - ribbored

Affirmation

Simple form	V-ing form
I can ribbor you can ribbor he can ribbor we can ribbor you can ribbor they can ribbor	I can be ribboring you can be ribboring he can be ribboring we can be ribboring you can be ribboring they can be ribboring
Perfect	V-ing perfect
I can have ribbored you can have ribbored he can have ribbored we can have ribbored you can have ribbored they can have ribbored	I can have been ribboring you can have been ribboring he can have been ribboring we can have been ribboring you can have been ribboring they can have been ribboring

Negation

Simple form	V-ing form
I can't ribbor you can't ribbor he can't ribbor we can't ribbor you can't ribbor they can't ribbor	I can't be ribboring you can't be ribboring he can't be ribboring we can't be ribboring you can't be ribboring they can't be ribboring
Perfect	V-ing perfect
I can't have ribbored you can't have ribbored he can't have ribbored we can't have ribbored you can't have ribbored they can't have ribbored	I can't have been ribboring you can't have been ribboring he can't have been ribboring we can't have been ribboring you can't have been ribboring they can't have been ribboring

Interrogative form

Simple form	V-ing form
can I ribbor? can you ribbor? can he ribbor? can we ribbor? can you ribbor? can they ribbor?	can I be ribboring? can you be ribboring? can he be ribboring? can we be ribboring? can you be ribboring? can they be ribboring?
Perfect	V-ing perfect
can I have ribbored? can you have ribbored? can he have ribbored? can we have ribbored? can you have ribbored? can they have ribbored?	can I have been ribboring? can you have been ribboring? can he have been ribboring? can we have been ribboring? can you have been ribboring? can they have been ribboring?

Interro-negative form

Simple form	V-ing form
can't I ribbor? can't you ribbor? can't he ribbor? can't we ribbor? can't you ribbor? can't they ribbor?	can't I be ribboring? can't you be ribboring? can't he be ribboring? can't we be ribboring? can't you be ribboring? can't they be ribboring?
Perfect	V-ing perfect
can't I have ribbored? can't you have ribbored? can't he have ribbored? can't we have ribbored? can't you have ribbored? can't they have ribbored?	can't I have been ribboring? can't you have been ribboring? can't he have been ribboring? can't we have been ribboring? can't you have been ribboring? can't they have been ribboring?