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