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 cannot ribbor you cannot ribbor she cannot ribbor we cannot ribbor you cannot ribbor they cannot ribbor	I cannot be ribboring you cannot be ribboring she cannot be ribboring we cannot be ribboring you cannot be ribboring they cannot be ribboring
Perfect	V-ing perfect
I cannot have ribbored you cannot have ribbored she cannot have ribbored we cannot have ribbored you cannot have ribbored they cannot have ribbored	I cannot have been ribboring you cannot have been ribboring she cannot have been ribboring we cannot have been ribboring you cannot have been ribboring they cannot 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 I not ribbor? can you not ribbor? can she not ribbor? can we not ribbor? can you not ribbor? can they not ribbor?	can I not be ribboring? can you not be ribboring? can she not be ribboring? can we not be ribboring? can you not be ribboring? can they not be ribboring?
Perfect	V-ing perfect
can I not have ribbored? can you not have ribbored? can she not have ribbored? can we not have ribbored? can you not have ribbored? can they not have ribbored?	can I not have been ribboring? can you not have been ribboring? can she not have been ribboring? can we not have been ribboring? can you not have been ribboring? can they not have been ribboring?