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 couldn't chance you couldn't chance he couldn't chance we couldn't chance you couldn't chance they couldn't chance
V-ing form
I couldn't be chancing you couldn't be chancing he couldn't be chancing we couldn't be chancing you couldn't be chancing they couldn't be chancing
Perfect
I couldn't have chanced you couldn't have chanced he couldn't have chanced we couldn't have chanced you couldn't have chanced they couldn't have chanced
V-ing perfect
I couldn't have been chancing you couldn't have been chancing he couldn't have been chancing we couldn't have been chancing you couldn't have been chancing they couldn't 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
couldn't I chance? couldn't you chance? couldn't he chance? couldn't we chance? couldn't you chance? couldn't they chance?
V-ing form
couldn't I be chancing? couldn't you be chancing? couldn't he be chancing? couldn't we be chancing? couldn't you be chancing? couldn't they be chancing?
Perfect
couldn't I have chanced? couldn't you have chanced? couldn't he have chanced? couldn't we have chanced? couldn't you have chanced? couldn't they have chanced?
V-ing perfect
couldn't I have been chancing? couldn't you have been chancing? couldn't he have been chancing? couldn't we have been chancing? couldn't you have been chancing? couldn't they have been chancing?