I could bilge you could bilge she could bilge we could bilge you could bilge they could bilge
V-ing form
I could be bilging you could be bilging she could be bilging we could be bilging you could be bilging they could be bilging
Perfect
I could have bilged you could have bilged she could have bilged we could have bilged you could have bilged they could have bilged
V-ing perfect
I could have been bilging you could have been bilging she could have been bilging we could have been bilging you could have been bilging they could have been bilging
Negation
Simple form
I could not bilge you could not bilge she could not bilge we could not bilge you could not bilge they could not bilge
V-ing form
I could not be bilging you could not be bilging she could not be bilging we could not be bilging you could not be bilging they could not be bilging
Perfect
I could not have bilged you could not have bilged she could not have bilged we could not have bilged you could not have bilged they could not have bilged
V-ing perfect
I could not have been bilging you could not have been bilging she could not have been bilging we could not have been bilging you could not have been bilging they could not have been bilging
Interrogative form
Simple form
could I bilge? could you bilge? could she bilge? could we bilge? could you bilge? could they bilge?
V-ing form
could I be bilging? could you be bilging? could she be bilging? could we be bilging? could you be bilging? could they be bilging?
Perfect
could I have bilged? could you have bilged? could she have bilged? could we have bilged? could you have bilged? could they have bilged?
V-ing perfect
could I have been bilging? could you have been bilging? could she have been bilging? could we have been bilging? could you have been bilging? could they have been bilging?
Interro-negative form
Simple form
could I not bilge? could you not bilge? could she not bilge? could we not bilge? could you not bilge? could they not bilge?
V-ing form
could I not be bilging? could you not be bilging? could she not be bilging? could we not be bilging? could you not be bilging? could they not be bilging?
Perfect
could I not have bilged? could you not have bilged? could she not have bilged? could we not have bilged? could you not have bilged? could they not have bilged?
V-ing perfect
could I not have been bilging? could you not have been bilging? could she not have been bilging? could we not have been bilging? could you not have been bilging? could they not have been bilging?