I could prance you could prance he could prance we could prance you could prance they could prance
V-ing form
I could be prancing you could be prancing he could be prancing we could be prancing you could be prancing they could be prancing
Perfect
I could have pranced you could have pranced he could have pranced we could have pranced you could have pranced they could have pranced
V-ing perfect
I could have been prancing you could have been prancing he could have been prancing we could have been prancing you could have been prancing they could have been prancing
Negation
Simple form
I couldn't prance you couldn't prance he couldn't prance we couldn't prance you couldn't prance they couldn't prance
V-ing form
I couldn't be prancing you couldn't be prancing he couldn't be prancing we couldn't be prancing you couldn't be prancing they couldn't be prancing
Perfect
I couldn't have pranced you couldn't have pranced he couldn't have pranced we couldn't have pranced you couldn't have pranced they couldn't have pranced
V-ing perfect
I couldn't have been prancing you couldn't have been prancing he couldn't have been prancing we couldn't have been prancing you couldn't have been prancing they couldn't have been prancing
Interrogative form
Simple form
could I prance? could you prance? could he prance? could we prance? could you prance? could they prance?
V-ing form
could I be prancing? could you be prancing? could he be prancing? could we be prancing? could you be prancing? could they be prancing?
Perfect
could I have pranced? could you have pranced? could he have pranced? could we have pranced? could you have pranced? could they have pranced?
V-ing perfect
could I have been prancing? could you have been prancing? could he have been prancing? could we have been prancing? could you have been prancing? could they have been prancing?
Interro-negative form
Simple form
couldn't I prance? couldn't you prance? couldn't he prance? couldn't we prance? couldn't you prance? couldn't they prance?
V-ing form
couldn't I be prancing? couldn't you be prancing? couldn't he be prancing? couldn't we be prancing? couldn't you be prancing? couldn't they be prancing?
Perfect
couldn't I have pranced? couldn't you have pranced? couldn't he have pranced? couldn't we have pranced? couldn't you have pranced? couldn't they have pranced?
V-ing perfect
couldn't I have been prancing? couldn't you have been prancing? couldn't he have been prancing? couldn't we have been prancing? couldn't you have been prancing? couldn't they have been prancing?