I could state you could state she could state we could state you could state they could state
Forma con V-ing
I could be stating you could be stating she could be stating we could be stating you could be stating they could be stating
Perfecto
I could have stated you could have stated she could have stated we could have stated you could have stated they could have stated
Perfecto con V-ing
I could have been stating you could have been stating she could have been stating we could have been stating you could have been stating they could have been stating
Negación
Forma simple
I could not state you could not state she could not state we could not state you could not state they could not state
Forma con V-ing
I could not be stating you could not be stating she could not be stating we could not be stating you could not be stating they could not be stating
Perfecto
I could not have stated you could not have stated she could not have stated we could not have stated you could not have stated they could not have stated
Perfecto con V-ing
I could not have been stating you could not have been stating she could not have been stating we could not have been stating you could not have been stating they could not have been stating
Forma interrogativa
Forma simple
could I state? could you state? could she state? could we state? could you state? could they state?
Forma con V-ing
could I be stating? could you be stating? could she be stating? could we be stating? could you be stating? could they be stating?
Perfecto
could I have stated? could you have stated? could she have stated? could we have stated? could you have stated? could they have stated?
Perfecto con V-ing
could I have been stating? could you have been stating? could she have been stating? could we have been stating? could you have been stating? could they have been stating?
Forma interro-negativa
Forma simple
could I not state? could you not state? could she not state? could we not state? could you not state? could they not state?
Forma con V-ing
could I not be stating? could you not be stating? could she not be stating? could we not be stating? could you not be stating? could they not be stating?
Perfecto
could I not have stated? could you not have stated? could she not have stated? could we not have stated? could you not have stated? could they not have stated?
Perfecto con V-ing
could I not have been stating? could you not have been stating? could she not have been stating? could we not have been stating? could you not have been stating? could they not have been stating?