English verb conjugation
CAN RIBBOR

Regular verb: ribbor - ribbored - ribbored

Affirmation

Simple form	V-ing form
I can ribbor you can ribbor she can ribbor we can ribbor you can ribbor they can ribbor	I can be ribboring you can be ribboring she 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 she 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 she 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 she 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 she 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 she 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 she 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 she ribbor? can we ribbor? can you ribbor? can they ribbor?	can I be ribboring? can you be ribboring? can she 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 she 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 she 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 she 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 she 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 she 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 she have been ribboring? can't we have been ribboring? can't you have been ribboring? can't they have been ribboring?