I could chance you could chance he could chance we could chance you could chance they could chance
V-ing form
I could be chancing you could be chancing he could be chancing we could be chancing you could be chancing they could be chancing
Perfect
I could have chanced you could have chanced he could have chanced we could have chanced you could have chanced they could have chanced
V-ing perfect
I could have been chancing you could have been chancing he could have been chancing we could have been chancing you could have been chancing they could have been chancing
Negation
Simple form
I could not chance you could not chance he could not chance we could not chance you could not chance they could not chance
V-ing form
I could not be chancing you could not be chancing he could not be chancing we could not be chancing you could not be chancing they could not be chancing
Perfect
I could not have chanced you could not have chanced he could not have chanced we could not have chanced you could not have chanced they could not have chanced
V-ing perfect
I could not have been chancing you could not have been chancing he could not have been chancing we could not have been chancing you could not have been chancing they could not have been chancing
Interrogative form
Simple form
could I chance? could you chance? could he chance? could we chance? could you chance? could they chance?
V-ing form
could I be chancing? could you be chancing? could he be chancing? could we be chancing? could you be chancing? could they be chancing?
Perfect
could I have chanced? could you have chanced? could he have chanced? could we have chanced? could you have chanced? could they have chanced?
V-ing perfect
could I have been chancing? could you have been chancing? could he have been chancing? could we have been chancing? could you have been chancing? could they have been chancing?
Interro-negative form
Simple form
could I not chance? could you not chance? could he not chance? could we not chance? could you not chance? could they not chance?
V-ing form
could I not be chancing? could you not be chancing? could he not be chancing? could we not be chancing? could you not be chancing? could they not be chancing?
Perfect
could I not have chanced? could you not have chanced? could he not have chanced? could we not have chanced? could you not have chanced? could they not have chanced?
V-ing perfect
could I not have been chancing? could you not have been chancing? could he not have been chancing? could we not have been chancing? could you not have been chancing? could they not have been chancing?