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