I could ensure you could ensure he could ensure we could ensure you could ensure they could ensure
Forma con V-ing
I could be ensuring you could be ensuring he could be ensuring we could be ensuring you could be ensuring they could be ensuring
Perfecto
I could have ensured you could have ensured he could have ensured we could have ensured you could have ensured they could have ensured
Perfecto con V-ing
I could have been ensuring you could have been ensuring he could have been ensuring we could have been ensuring you could have been ensuring they could have been ensuring
Negación
Forma simple
I could not ensure you could not ensure he could not ensure we could not ensure you could not ensure they could not ensure
Forma con V-ing
I could not be ensuring you could not be ensuring he could not be ensuring we could not be ensuring you could not be ensuring they could not be ensuring
Perfecto
I could not have ensured you could not have ensured he could not have ensured we could not have ensured you could not have ensured they could not have ensured
Perfecto con V-ing
I could not have been ensuring you could not have been ensuring he could not have been ensuring we could not have been ensuring you could not have been ensuring they could not have been ensuring
Forma interrogativa
Forma simple
could I ensure? could you ensure? could he ensure? could we ensure? could you ensure? could they ensure?
Forma con V-ing
could I be ensuring? could you be ensuring? could he be ensuring? could we be ensuring? could you be ensuring? could they be ensuring?
Perfecto
could I have ensured? could you have ensured? could he have ensured? could we have ensured? could you have ensured? could they have ensured?
Perfecto con V-ing
could I have been ensuring? could you have been ensuring? could he have been ensuring? could we have been ensuring? could you have been ensuring? could they have been ensuring?
Forma interro-negativa
Forma simple
could I not ensure? could you not ensure? could he not ensure? could we not ensure? could you not ensure? could they not ensure?
Forma con V-ing
could I not be ensuring? could you not be ensuring? could he not be ensuring? could we not be ensuring? could you not be ensuring? could they not be ensuring?
Perfecto
could I not have ensured? could you not have ensured? could he not have ensured? could we not have ensured? could you not have ensured? could they not have ensured?
Perfecto con V-ing
could I not have been ensuring? could you not have been ensuring? could he not have been ensuring? could we not have been ensuring? could you not have been ensuring? could they not have been ensuring?