I could barn you could barn he could barn we could barn you could barn they could barn
Forma con V-ing
I could be barning you could be barning he could be barning we could be barning you could be barning they could be barning
Perfecto
I could have barned you could have barned he could have barned we could have barned you could have barned they could have barned
Perfecto con V-ing
I could have been barning you could have been barning he could have been barning we could have been barning you could have been barning they could have been barning
Negación
Forma simple
I could not barn you could not barn he could not barn we could not barn you could not barn they could not barn
Forma con V-ing
I could not be barning you could not be barning he could not be barning we could not be barning you could not be barning they could not be barning
Perfecto
I could not have barned you could not have barned he could not have barned we could not have barned you could not have barned they could not have barned
Perfecto con V-ing
I could not have been barning you could not have been barning he could not have been barning we could not have been barning you could not have been barning they could not have been barning
Forma interrogativa
Forma simple
could I barn? could you barn? could he barn? could we barn? could you barn? could they barn?
Forma con V-ing
could I be barning? could you be barning? could he be barning? could we be barning? could you be barning? could they be barning?
Perfecto
could I have barned? could you have barned? could he have barned? could we have barned? could you have barned? could they have barned?
Perfecto con V-ing
could I have been barning? could you have been barning? could he have been barning? could we have been barning? could you have been barning? could they have been barning?
Forma interro-negativa
Forma simple
could I not barn? could you not barn? could he not barn? could we not barn? could you not barn? could they not barn?
Forma con V-ing
could I not be barning? could you not be barning? could he not be barning? could we not be barning? could you not be barning? could they not be barning?
Perfecto
could I not have barned? could you not have barned? could he not have barned? could we not have barned? could you not have barned? could they not have barned?
Perfecto con V-ing
could I not have been barning? could you not have been barning? could he not have been barning? could we not have been barning? could you not have been barning? could they not have been barning?