Atención, este verbo puede no existir, se da como ejemplo la conjugación.
Afirmación
Forma simple
I could add add you could add add she could add add we could add add you could add add they could add add
Forma con V-ing
I could be add adding you could be add adding she could be add adding we could be add adding you could be add adding they could be add adding
Perfecto
I could have add added you could have add added she could have add added we could have add added you could have add added they could have add added
Perfecto con V-ing
I could have been add adding you could have been add adding she could have been add adding we could have been add adding you could have been add adding they could have been add adding
Negación
Forma simple
I could not add add you could not add add she could not add add we could not add add you could not add add they could not add add
Forma con V-ing
I could not be add adding you could not be add adding she could not be add adding we could not be add adding you could not be add adding they could not be add adding
Perfecto
I could not have add added you could not have add added she could not have add added we could not have add added you could not have add added they could not have add added
Perfecto con V-ing
I could not have been add adding you could not have been add adding she could not have been add adding we could not have been add adding you could not have been add adding they could not have been add adding
Forma interrogativa
Forma simple
could I add add? could you add add? could she add add? could we add add? could you add add? could they add add?
Forma con V-ing
could I be add adding? could you be add adding? could she be add adding? could we be add adding? could you be add adding? could they be add adding?
Perfecto
could I have add added? could you have add added? could she have add added? could we have add added? could you have add added? could they have add added?
Perfecto con V-ing
could I have been add adding? could you have been add adding? could she have been add adding? could we have been add adding? could you have been add adding? could they have been add adding?
Forma interro-negativa
Forma simple
could I not add add? could you not add add? could she not add add? could we not add add? could you not add add? could they not add add?
Forma con V-ing
could I not be add adding? could you not be add adding? could she not be add adding? could we not be add adding? could you not be add adding? could they not be add adding?
Perfecto
could I not have add added? could you not have add added? could she not have add added? could we not have add added? could you not have add added? could they not have add added?
Perfecto con V-ing
could I not have been add adding? could you not have been add adding? could she not have been add adding? could we not have been add adding? could you not have been add adding? could they not have been add adding?