I could smoke you could smoke he could smoke we could smoke you could smoke they could smoke
Forma con V-ing
I could be smoking you could be smoking he could be smoking we could be smoking you could be smoking they could be smoking
Perfecto
I could have smoked you could have smoked he could have smoked we could have smoked you could have smoked they could have smoked
Perfecto con V-ing
I could have been smoking you could have been smoking he could have been smoking we could have been smoking you could have been smoking they could have been smoking
Negación
Forma simple
I could not smoke you could not smoke he could not smoke we could not smoke you could not smoke they could not smoke
Forma con V-ing
I could not be smoking you could not be smoking he could not be smoking we could not be smoking you could not be smoking they could not be smoking
Perfecto
I could not have smoked you could not have smoked he could not have smoked we could not have smoked you could not have smoked they could not have smoked
Perfecto con V-ing
I could not have been smoking you could not have been smoking he could not have been smoking we could not have been smoking you could not have been smoking they could not have been smoking
Forma interrogativa
Forma simple
could I smoke? could you smoke? could he smoke? could we smoke? could you smoke? could they smoke?
Forma con V-ing
could I be smoking? could you be smoking? could he be smoking? could we be smoking? could you be smoking? could they be smoking?
Perfecto
could I have smoked? could you have smoked? could he have smoked? could we have smoked? could you have smoked? could they have smoked?
Perfecto con V-ing
could I have been smoking? could you have been smoking? could he have been smoking? could we have been smoking? could you have been smoking? could they have been smoking?
Forma interro-negativa
Forma simple
could I not smoke? could you not smoke? could he not smoke? could we not smoke? could you not smoke? could they not smoke?
Forma con V-ing
could I not be smoking? could you not be smoking? could he not be smoking? could we not be smoking? could you not be smoking? could they not be smoking?
Perfecto
could I not have smoked? could you not have smoked? could he not have smoked? could we not have smoked? could you not have smoked? could they not have smoked?
Perfecto con V-ing
could I not have been smoking? could you not have been smoking? could he not have been smoking? could we not have been smoking? could you not have been smoking? could they not have been smoking?