I could wager you could wager she could wager we could wager you could wager they could wager
V-ing form
I could be wagering you could be wagering she could be wagering we could be wagering you could be wagering they could be wagering
Perfect
I could have wagered you could have wagered she could have wagered we could have wagered you could have wagered they could have wagered
V-ing perfect
I could have been wagering you could have been wagering she could have been wagering we could have been wagering you could have been wagering they could have been wagering
Negation
Simple form
I could not wager you could not wager she could not wager we could not wager you could not wager they could not wager
V-ing form
I could not be wagering you could not be wagering she could not be wagering we could not be wagering you could not be wagering they could not be wagering
Perfect
I could not have wagered you could not have wagered she could not have wagered we could not have wagered you could not have wagered they could not have wagered
V-ing perfect
I could not have been wagering you could not have been wagering she could not have been wagering we could not have been wagering you could not have been wagering they could not have been wagering
Interrogative form
Simple form
could I wager? could you wager? could she wager? could we wager? could you wager? could they wager?
V-ing form
could I be wagering? could you be wagering? could she be wagering? could we be wagering? could you be wagering? could they be wagering?
Perfect
could I have wagered? could you have wagered? could she have wagered? could we have wagered? could you have wagered? could they have wagered?
V-ing perfect
could I have been wagering? could you have been wagering? could she have been wagering? could we have been wagering? could you have been wagering? could they have been wagering?
Interro-negative form
Simple form
could I not wager? could you not wager? could she not wager? could we not wager? could you not wager? could they not wager?
V-ing form
could I not be wagering? could you not be wagering? could she not be wagering? could we not be wagering? could you not be wagering? could they not be wagering?
Perfect
could I not have wagered? could you not have wagered? could she not have wagered? could we not have wagered? could you not have wagered? could they not have wagered?
V-ing perfect
could I not have been wagering? could you not have been wagering? could she not have been wagering? could we not have been wagering? could you not have been wagering? could they not have been wagering?