I could gorge you could gorge she could gorge we could gorge you could gorge they could gorge
V-ing form
I could be gorging you could be gorging she could be gorging we could be gorging you could be gorging they could be gorging
Perfect
I could have gorged you could have gorged she could have gorged we could have gorged you could have gorged they could have gorged
V-ing perfect
I could have been gorging you could have been gorging she could have been gorging we could have been gorging you could have been gorging they could have been gorging
Negation
Simple form
I couldn't gorge you couldn't gorge she couldn't gorge we couldn't gorge you couldn't gorge they couldn't gorge
V-ing form
I couldn't be gorging you couldn't be gorging she couldn't be gorging we couldn't be gorging you couldn't be gorging they couldn't be gorging
Perfect
I couldn't have gorged you couldn't have gorged she couldn't have gorged we couldn't have gorged you couldn't have gorged they couldn't have gorged
V-ing perfect
I couldn't have been gorging you couldn't have been gorging she couldn't have been gorging we couldn't have been gorging you couldn't have been gorging they couldn't have been gorging
Interrogative form
Simple form
could I gorge? could you gorge? could she gorge? could we gorge? could you gorge? could they gorge?
V-ing form
could I be gorging? could you be gorging? could she be gorging? could we be gorging? could you be gorging? could they be gorging?
Perfect
could I have gorged? could you have gorged? could she have gorged? could we have gorged? could you have gorged? could they have gorged?
V-ing perfect
could I have been gorging? could you have been gorging? could she have been gorging? could we have been gorging? could you have been gorging? could they have been gorging?
Interro-negative form
Simple form
couldn't I gorge? couldn't you gorge? couldn't she gorge? couldn't we gorge? couldn't you gorge? couldn't they gorge?
V-ing form
couldn't I be gorging? couldn't you be gorging? couldn't she be gorging? couldn't we be gorging? couldn't you be gorging? couldn't they be gorging?
Perfect
couldn't I have gorged? couldn't you have gorged? couldn't she have gorged? couldn't we have gorged? couldn't you have gorged? couldn't they have gorged?
V-ing perfect
couldn't I have been gorging? couldn't you have been gorging? couldn't she have been gorging? couldn't we have been gorging? couldn't you have been gorging? couldn't they have been gorging?