I could redo you could redo he could redo we could redo you could redo they could redo
Forma con V-ing
I could be redoing you could be redoing he could be redoing we could be redoing you could be redoing they could be redoing
Perfecto
I could have redone you could have redone he could have redone we could have redone you could have redone they could have redone
Perfecto con V-ing
I could have been redoing you could have been redoing he could have been redoing we could have been redoing you could have been redoing they could have been redoing
Negación
Forma simple
I could not redo you could not redo he could not redo we could not redo you could not redo they could not redo
Forma con V-ing
I could not be redoing you could not be redoing he could not be redoing we could not be redoing you could not be redoing they could not be redoing
Perfecto
I could not have redone you could not have redone he could not have redone we could not have redone you could not have redone they could not have redone
Perfecto con V-ing
I could not have been redoing you could not have been redoing he could not have been redoing we could not have been redoing you could not have been redoing they could not have been redoing
Forma interrogativa
Forma simple
could I redo? could you redo? could he redo? could we redo? could you redo? could they redo?
Forma con V-ing
could I be redoing? could you be redoing? could he be redoing? could we be redoing? could you be redoing? could they be redoing?
Perfecto
could I have redone? could you have redone? could he have redone? could we have redone? could you have redone? could they have redone?
Perfecto con V-ing
could I have been redoing? could you have been redoing? could he have been redoing? could we have been redoing? could you have been redoing? could they have been redoing?
Forma interro-negativa
Forma simple
could I not redo? could you not redo? could he not redo? could we not redo? could you not redo? could they not redo?
Forma con V-ing
could I not be redoing? could you not be redoing? could he not be redoing? could we not be redoing? could you not be redoing? could they not be redoing?
Perfecto
could I not have redone? could you not have redone? could he not have redone? could we not have redone? could you not have redone? could they not have redone?
Perfecto con V-ing
could I not have been redoing? could you not have been redoing? could he not have been redoing? could we not have been redoing? could you not have been redoing? could they not have been redoing?