Conjugación del verbo inglés
CAN RUFF

Verbo regular: ruff - ruffed - ruffed

Afirmación

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

Negación

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

Forma interrogativa

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

Forma interro-negativa

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