I could chatter you could chatter he could chatter we could chatter you could chatter they could chatter
Forma con V-ing
I could be chattering you could be chattering he could be chattering we could be chattering you could be chattering they could be chattering
Perfecto
I could have chattered you could have chattered he could have chattered we could have chattered you could have chattered they could have chattered
Perfecto con V-ing
I could have been chattering you could have been chattering he could have been chattering we could have been chattering you could have been chattering they could have been chattering
Negación
Forma simple
I could not chatter you could not chatter he could not chatter we could not chatter you could not chatter they could not chatter
Forma con V-ing
I could not be chattering you could not be chattering he could not be chattering we could not be chattering you could not be chattering they could not be chattering
Perfecto
I could not have chattered you could not have chattered he could not have chattered we could not have chattered you could not have chattered they could not have chattered
Perfecto con V-ing
I could not have been chattering you could not have been chattering he could not have been chattering we could not have been chattering you could not have been chattering they could not have been chattering
Forma interrogativa
Forma simple
could I chatter? could you chatter? could he chatter? could we chatter? could you chatter? could they chatter?
Forma con V-ing
could I be chattering? could you be chattering? could he be chattering? could we be chattering? could you be chattering? could they be chattering?
Perfecto
could I have chattered? could you have chattered? could he have chattered? could we have chattered? could you have chattered? could they have chattered?
Perfecto con V-ing
could I have been chattering? could you have been chattering? could he have been chattering? could we have been chattering? could you have been chattering? could they have been chattering?
Forma interro-negativa
Forma simple
could I not chatter? could you not chatter? could he not chatter? could we not chatter? could you not chatter? could they not chatter?
Forma con V-ing
could I not be chattering? could you not be chattering? could he not be chattering? could we not be chattering? could you not be chattering? could they not be chattering?
Perfecto
could I not have chattered? could you not have chattered? could he not have chattered? could we not have chattered? could you not have chattered? could they not have chattered?
Perfecto con V-ing
could I not have been chattering? could you not have been chattering? could he not have been chattering? could we not have been chattering? could you not have been chattering? could they not have been chattering?