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