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