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