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 couldn't ruff you couldn't ruff he couldn't ruff we couldn't ruff you couldn't ruff they couldn't ruff	I couldn't be ruffing you couldn't be ruffing he couldn't be ruffing we couldn't be ruffing you couldn't be ruffing they couldn't be ruffing
Perfecto	Perfecto con V-ing
I couldn't have ruffed you couldn't have ruffed he couldn't have ruffed we couldn't have ruffed you couldn't have ruffed they couldn't have ruffed	I couldn't have been ruffing you couldn't have been ruffing he couldn't have been ruffing we couldn't have been ruffing you couldn't have been ruffing they couldn't 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
couldn't I ruff? couldn't you ruff? couldn't he ruff? couldn't we ruff? couldn't you ruff? couldn't they ruff?	couldn't I be ruffing? couldn't you be ruffing? couldn't he be ruffing? couldn't we be ruffing? couldn't you be ruffing? couldn't they be ruffing?
Perfecto	Perfecto con V-ing
couldn't I have ruffed? couldn't you have ruffed? couldn't he have ruffed? couldn't we have ruffed? couldn't you have ruffed? couldn't they have ruffed?	couldn't I have been ruffing? couldn't you have been ruffing? couldn't he have been ruffing? couldn't we have been ruffing? couldn't you have been ruffing? couldn't they have been ruffing?