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 couldn't pup you couldn't pup he couldn't pup we couldn't pup you couldn't pup they couldn't pup	I couldn't be pupping you couldn't be pupping he couldn't be pupping we couldn't be pupping you couldn't be pupping they couldn't be pupping
Perfect	V-ing perfect
I couldn't have pupped you couldn't have pupped he couldn't have pupped we couldn't have pupped you couldn't have pupped they couldn't have pupped	I couldn't have been pupping you couldn't have been pupping he couldn't have been pupping we couldn't have been pupping you couldn't have been pupping they couldn't 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
couldn't I pup? couldn't you pup? couldn't he pup? couldn't we pup? couldn't you pup? couldn't they pup?	couldn't I be pupping? couldn't you be pupping? couldn't he be pupping? couldn't we be pupping? couldn't you be pupping? couldn't they be pupping?
Perfect	V-ing perfect
couldn't I have pupped? couldn't you have pupped? couldn't he have pupped? couldn't we have pupped? couldn't you have pupped? couldn't they have pupped?	couldn't I have been pupping? couldn't you have been pupping? couldn't he have been pupping? couldn't we have been pupping? couldn't you have been pupping? couldn't they have been pupping?