I could bell you could bell he could bell we could bell you could bell they could bell
Forma con V-ing
I could be belling you could be belling he could be belling we could be belling you could be belling they could be belling
Perfecto
I could have belled you could have belled he could have belled we could have belled you could have belled they could have belled
Perfecto con V-ing
I could have been belling you could have been belling he could have been belling we could have been belling you could have been belling they could have been belling
Negación
Forma simple
I could not bell you could not bell he could not bell we could not bell you could not bell they could not bell
Forma con V-ing
I could not be belling you could not be belling he could not be belling we could not be belling you could not be belling they could not be belling
Perfecto
I could not have belled you could not have belled he could not have belled we could not have belled you could not have belled they could not have belled
Perfecto con V-ing
I could not have been belling you could not have been belling he could not have been belling we could not have been belling you could not have been belling they could not have been belling
Forma interrogativa
Forma simple
could I bell? could you bell? could he bell? could we bell? could you bell? could they bell?
Forma con V-ing
could I be belling? could you be belling? could he be belling? could we be belling? could you be belling? could they be belling?
Perfecto
could I have belled? could you have belled? could he have belled? could we have belled? could you have belled? could they have belled?
Perfecto con V-ing
could I have been belling? could you have been belling? could he have been belling? could we have been belling? could you have been belling? could they have been belling?
Forma interro-negativa
Forma simple
could I not bell? could you not bell? could he not bell? could we not bell? could you not bell? could they not bell?
Forma con V-ing
could I not be belling? could you not be belling? could he not be belling? could we not be belling? could you not be belling? could they not be belling?
Perfecto
could I not have belled? could you not have belled? could he not have belled? could we not have belled? could you not have belled? could they not have belled?
Perfecto con V-ing
could I not have been belling? could you not have been belling? could he not have been belling? could we not have been belling? could you not have been belling? could they not have been belling?