English verb conjugation
COULD CONFAB

Regular verb: confab - confabed - confabed

Affirmation

Simple form	V-ing form
I could confab you could confab he could confab we could confab you could confab they could confab	I could be confabing you could be confabing he could be confabing we could be confabing you could be confabing they could be confabing
Perfect	V-ing perfect
I could have confabed you could have confabed he could have confabed we could have confabed you could have confabed they could have confabed	I could have been confabing you could have been confabing he could have been confabing we could have been confabing you could have been confabing they could have been confabing

Negation

Simple form	V-ing form
I couldn't confab you couldn't confab he couldn't confab we couldn't confab you couldn't confab they couldn't confab	I couldn't be confabing you couldn't be confabing he couldn't be confabing we couldn't be confabing you couldn't be confabing they couldn't be confabing
Perfect	V-ing perfect
I couldn't have confabed you couldn't have confabed he couldn't have confabed we couldn't have confabed you couldn't have confabed they couldn't have confabed	I couldn't have been confabing you couldn't have been confabing he couldn't have been confabing we couldn't have been confabing you couldn't have been confabing they couldn't have been confabing

Interrogative form

Simple form	V-ing form
could I confab? could you confab? could he confab? could we confab? could you confab? could they confab?	could I be confabing? could you be confabing? could he be confabing? could we be confabing? could you be confabing? could they be confabing?
Perfect	V-ing perfect
could I have confabed? could you have confabed? could he have confabed? could we have confabed? could you have confabed? could they have confabed?	could I have been confabing? could you have been confabing? could he have been confabing? could we have been confabing? could you have been confabing? could they have been confabing?

Interro-negative form

Simple form	V-ing form
couldn't I confab? couldn't you confab? couldn't he confab? couldn't we confab? couldn't you confab? couldn't they confab?	couldn't I be confabing? couldn't you be confabing? couldn't he be confabing? couldn't we be confabing? couldn't you be confabing? couldn't they be confabing?
Perfect	V-ing perfect
couldn't I have confabed? couldn't you have confabed? couldn't he have confabed? couldn't we have confabed? couldn't you have confabed? couldn't they have confabed?	couldn't I have been confabing? couldn't you have been confabing? couldn't he have been confabing? couldn't we have been confabing? couldn't you have been confabing? couldn't they have been confabing?