I can snuff you can snuff he can snuff we can snuff you can snuff they can snuff
Forma com V-ing
I can be snuffing you can be snuffing he can be snuffing we can be snuffing you can be snuffing they can be snuffing
Perfeito
I can have snuffed you can have snuffed he can have snuffed we can have snuffed you can have snuffed they can have snuffed
Perfeito com V-ing
I can have been snuffing you can have been snuffing he can have been snuffing we can have been snuffing you can have been snuffing they can have been snuffing
Negação
Forma simple
I cannot snuff you cannot snuff he cannot snuff we cannot snuff you cannot snuff they cannot snuff
Forma com V-ing
I cannot be snuffing you cannot be snuffing he cannot be snuffing we cannot be snuffing you cannot be snuffing they cannot be snuffing
Perfeito
I cannot have snuffed you cannot have snuffed he cannot have snuffed we cannot have snuffed you cannot have snuffed they cannot have snuffed
Perfeito com V-ing
I cannot have been snuffing you cannot have been snuffing he cannot have been snuffing we cannot have been snuffing you cannot have been snuffing they cannot have been snuffing
Forma interrogativa
Forma simple
can I snuff? can you snuff? can he snuff? can we snuff? can you snuff? can they snuff?
Forma com V-ing
can I be snuffing? can you be snuffing? can he be snuffing? can we be snuffing? can you be snuffing? can they be snuffing?
Perfeito
can I have snuffed? can you have snuffed? can he have snuffed? can we have snuffed? can you have snuffed? can they have snuffed?
Perfeito com V-ing
can I have been snuffing? can you have been snuffing? can he have been snuffing? can we have been snuffing? can you have been snuffing? can they have been snuffing?
Forma interro-Negação
Forma simple
can I not snuff? can you not snuff? can he not snuff? can we not snuff? can you not snuff? can they not snuff?
Forma com V-ing
can I not be snuffing? can you not be snuffing? can he not be snuffing? can we not be snuffing? can you not be snuffing? can they not be snuffing?
Perfeito
can I not have snuffed? can you not have snuffed? can he not have snuffed? can we not have snuffed? can you not have snuffed? can they not have snuffed?
Perfeito com V-ing
can I not have been snuffing? can you not have been snuffing? can he not have been snuffing? can we not have been snuffing? can you not have been snuffing? can they not have been snuffing?