I could demand you could demand she could demand we could demand you could demand they could demand
V-ing form
I could be demanding you could be demanding she could be demanding we could be demanding you could be demanding they could be demanding
Perfect
I could have demanded you could have demanded she could have demanded we could have demanded you could have demanded they could have demanded
V-ing perfect
I could have been demanding you could have been demanding she could have been demanding we could have been demanding you could have been demanding they could have been demanding
Negation
Simple form
I couldn't demand you couldn't demand she couldn't demand we couldn't demand you couldn't demand they couldn't demand
V-ing form
I couldn't be demanding you couldn't be demanding she couldn't be demanding we couldn't be demanding you couldn't be demanding they couldn't be demanding
Perfect
I couldn't have demanded you couldn't have demanded she couldn't have demanded we couldn't have demanded you couldn't have demanded they couldn't have demanded
V-ing perfect
I couldn't have been demanding you couldn't have been demanding she couldn't have been demanding we couldn't have been demanding you couldn't have been demanding they couldn't have been demanding
Interrogative form
Simple form
could I demand? could you demand? could she demand? could we demand? could you demand? could they demand?
V-ing form
could I be demanding? could you be demanding? could she be demanding? could we be demanding? could you be demanding? could they be demanding?
Perfect
could I have demanded? could you have demanded? could she have demanded? could we have demanded? could you have demanded? could they have demanded?
V-ing perfect
could I have been demanding? could you have been demanding? could she have been demanding? could we have been demanding? could you have been demanding? could they have been demanding?
Interro-negative form
Simple form
couldn't I demand? couldn't you demand? couldn't she demand? couldn't we demand? couldn't you demand? couldn't they demand?
V-ing form
couldn't I be demanding? couldn't you be demanding? couldn't she be demanding? couldn't we be demanding? couldn't you be demanding? couldn't they be demanding?
Perfect
couldn't I have demanded? couldn't you have demanded? couldn't she have demanded? couldn't we have demanded? couldn't you have demanded? couldn't they have demanded?
V-ing perfect
couldn't I have been demanding? couldn't you have been demanding? couldn't she have been demanding? couldn't we have been demanding? couldn't you have been demanding? couldn't they have been demanding?