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