English verb conjugation
COULD PUP

Regular verb: pup - pupped - pupped

Affirmation

Simple form	V-ing form
I could pup you could pup he could pup we could pup you could pup they could pup	I could be pupping you could be pupping he could be pupping we could be pupping you could be pupping they could be pupping
Perfect	V-ing perfect
I could have pupped you could have pupped he could have pupped we could have pupped you could have pupped they could have pupped	I could have been pupping you could have been pupping he could have been pupping we could have been pupping you could have been pupping they could have been pupping

Negation

Simple form	V-ing form
I could not pup you could not pup he could not pup we could not pup you could not pup they could not pup	I could not be pupping you could not be pupping he could not be pupping we could not be pupping you could not be pupping they could not be pupping
Perfect	V-ing perfect
I could not have pupped you could not have pupped he could not have pupped we could not have pupped you could not have pupped they could not have pupped	I could not have been pupping you could not have been pupping he could not have been pupping we could not have been pupping you could not have been pupping they could not have been pupping

Interrogative form

Simple form	V-ing form
could I pup? could you pup? could he pup? could we pup? could you pup? could they pup?	could I be pupping? could you be pupping? could he be pupping? could we be pupping? could you be pupping? could they be pupping?
Perfect	V-ing perfect
could I have pupped? could you have pupped? could he have pupped? could we have pupped? could you have pupped? could they have pupped?	could I have been pupping? could you have been pupping? could he have been pupping? could we have been pupping? could you have been pupping? could they have been pupping?

Interro-negative form

Simple form	V-ing form
could I not pup? could you not pup? could he not pup? could we not pup? could you not pup? could they not pup?	could I not be pupping? could you not be pupping? could he not be pupping? could we not be pupping? could you not be pupping? could they not be pupping?
Perfect	V-ing perfect
could I not have pupped? could you not have pupped? could he not have pupped? could we not have pupped? could you not have pupped? could they not have pupped?	could I not have been pupping? could you not have been pupping? could he not have been pupping? could we not have been pupping? could you not have been pupping? could they not have been pupping?