I could secede you could secede she could secede we could secede you could secede they could secede
V-ing form
I could be seceding you could be seceding she could be seceding we could be seceding you could be seceding they could be seceding
Perfect
I could have seceded you could have seceded she could have seceded we could have seceded you could have seceded they could have seceded
V-ing perfect
I could have been seceding you could have been seceding she could have been seceding we could have been seceding you could have been seceding they could have been seceding
Negation
Simple form
I could not secede you could not secede she could not secede we could not secede you could not secede they could not secede
V-ing form
I could not be seceding you could not be seceding she could not be seceding we could not be seceding you could not be seceding they could not be seceding
Perfect
I could not have seceded you could not have seceded she could not have seceded we could not have seceded you could not have seceded they could not have seceded
V-ing perfect
I could not have been seceding you could not have been seceding she could not have been seceding we could not have been seceding you could not have been seceding they could not have been seceding
Interrogative form
Simple form
could I secede? could you secede? could she secede? could we secede? could you secede? could they secede?
V-ing form
could I be seceding? could you be seceding? could she be seceding? could we be seceding? could you be seceding? could they be seceding?
Perfect
could I have seceded? could you have seceded? could she have seceded? could we have seceded? could you have seceded? could they have seceded?
V-ing perfect
could I have been seceding? could you have been seceding? could she have been seceding? could we have been seceding? could you have been seceding? could they have been seceding?
Interro-negative form
Simple form
could I not secede? could you not secede? could she not secede? could we not secede? could you not secede? could they not secede?
V-ing form
could I not be seceding? could you not be seceding? could she not be seceding? could we not be seceding? could you not be seceding? could they not be seceding?
Perfect
could I not have seceded? could you not have seceded? could she not have seceded? could we not have seceded? could you not have seceded? could they not have seceded?
V-ing perfect
could I not have been seceding? could you not have been seceding? could she not have been seceding? could we not have been seceding? could you not have been seceding? could they not have been seceding?