English verb conjugation
COULD SUP

Regular verb: sup - supped - supped

Affirmation

Simple form	V-ing form
I could sup you could sup she could sup we could sup you could sup they could sup	I could be supping you could be supping she could be supping we could be supping you could be supping they could be supping
Perfect	V-ing perfect
I could have supped you could have supped she could have supped we could have supped you could have supped they could have supped	I could have been supping you could have been supping she could have been supping we could have been supping you could have been supping they could have been supping

Negation

Simple form	V-ing form
I could not sup you could not sup she could not sup we could not sup you could not sup they could not sup	I could not be supping you could not be supping she could not be supping we could not be supping you could not be supping they could not be supping
Perfect	V-ing perfect
I could not have supped you could not have supped she could not have supped we could not have supped you could not have supped they could not have supped	I could not have been supping you could not have been supping she could not have been supping we could not have been supping you could not have been supping they could not have been supping

Interrogative form

Simple form	V-ing form
could I sup? could you sup? could she sup? could we sup? could you sup? could they sup?	could I be supping? could you be supping? could she be supping? could we be supping? could you be supping? could they be supping?
Perfect	V-ing perfect
could I have supped? could you have supped? could she have supped? could we have supped? could you have supped? could they have supped?	could I have been supping? could you have been supping? could she have been supping? could we have been supping? could you have been supping? could they have been supping?

Interro-negative form

Simple form	V-ing form
could I not sup? could you not sup? could she not sup? could we not sup? could you not sup? could they not sup?	could I not be supping? could you not be supping? could she not be supping? could we not be supping? could you not be supping? could they not be supping?
Perfect	V-ing perfect
could I not have supped? could you not have supped? could she not have supped? could we not have supped? could you not have supped? could they not have supped?	could I not have been supping? could you not have been supping? could she not have been supping? could we not have been supping? could you not have been supping? could they not have been supping?