I could hang you could hang she could hang we could hang you could hang they could hang
V-ing form
I could be hanging you could be hanging she could be hanging we could be hanging you could be hanging they could be hanging
Perfect
I could have hung you could have hung she 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 she 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 she 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 she 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 she 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 she 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 she hang? could we hang? could you hang? could they hang?
V-ing form
could I be hanging? could you be hanging? could she be hanging? could we be hanging? could you be hanging? could they be hanging?
Perfect
could I have hung? could you have hung? could she 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 she 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 she 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 she 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 she 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 she have been hanging? couldn't we have been hanging? couldn't you have been hanging? couldn't they have been hanging?