Conjugación del verbo inglés
COULD RUFF

Verbo regular: ruff - ruffed - ruffed

Afirmación

Forma simple	Forma con V-ing
I could ruff you could ruff he could ruff we could ruff you could ruff they could ruff	I could be ruffing you could be ruffing he could be ruffing we could be ruffing you could be ruffing they could be ruffing
Perfecto	Perfecto con V-ing
I could have ruffed you could have ruffed he could have ruffed we could have ruffed you could have ruffed they could have ruffed	I could have been ruffing you could have been ruffing he could have been ruffing we could have been ruffing you could have been ruffing they could have been ruffing

Negación

Forma simple	Forma con V-ing
I could not ruff you could not ruff he could not ruff we could not ruff you could not ruff they could not ruff	I could not be ruffing you could not be ruffing he could not be ruffing we could not be ruffing you could not be ruffing they could not be ruffing
Perfecto	Perfecto con V-ing
I could not have ruffed you could not have ruffed he could not have ruffed we could not have ruffed you could not have ruffed they could not have ruffed	I could not have been ruffing you could not have been ruffing he could not have been ruffing we could not have been ruffing you could not have been ruffing they could not have been ruffing

Forma interrogativa

Forma simple	Forma con V-ing
could I ruff? could you ruff? could he ruff? could we ruff? could you ruff? could they ruff?	could I be ruffing? could you be ruffing? could he be ruffing? could we be ruffing? could you be ruffing? could they be ruffing?
Perfecto	Perfecto con V-ing
could I have ruffed? could you have ruffed? could he have ruffed? could we have ruffed? could you have ruffed? could they have ruffed?	could I have been ruffing? could you have been ruffing? could he have been ruffing? could we have been ruffing? could you have been ruffing? could they have been ruffing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not ruff? could you not ruff? could he not ruff? could we not ruff? could you not ruff? could they not ruff?	could I not be ruffing? could you not be ruffing? could he not be ruffing? could we not be ruffing? could you not be ruffing? could they not be ruffing?
Perfecto	Perfecto con V-ing
could I not have ruffed? could you not have ruffed? could he not have ruffed? could we not have ruffed? could you not have ruffed? could they not have ruffed?	could I not have been ruffing? could you not have been ruffing? could he not have been ruffing? could we not have been ruffing? could you not have been ruffing? could they not have been ruffing?