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