could snuff
Verbo regular: snuff - snuffed- snuffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could snuff
you could snuff
he could snuff
we could snuff
you could snuff
they could snuff 	I could be snuffing
you could be snuffing
he could be snuffing
we could be snuffing
you could be snuffing
they could be snuffing	I could have snuffed
you could have snuffed
he could have snuffed
we could have snuffed
you could have snuffed
they could have snuffed	I could have been snuffing
you could have been snuffing
he could have been snuffing
we could have been snuffing
you could have been snuffing
they could have been snuffing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not snuff
you could not snuff
he could not snuff
we could not snuff
you could not snuff
they could not snuff 	I could not be snuffing
you could not be snuffing
he could not be snuffing
we could not be snuffing
you could not be snuffing
they could not be snuffing	I could not have snuffed
you could not have snuffed
he could not have snuffed
we could not have snuffed
you could not have snuffed
they could not have snuffed	I could not have been snuffing
you could not have been snuffing
he could not have been snuffing
we could not have been snuffing
you could not have been snuffing
they could not have been snuffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I snuff?
could you snuff?
could he snuff?
could we snuff?
could you snuff?
could they snuff? 	could I be snuffing?
could you be snuffing?
could he be snuffing?
could we be snuffing?
could you be snuffing?
could they be snuffing? 	could I have snuffed?
could you have snuffed?
could he have snuffed?
could we have snuffed?
could you have snuffed?
could they have snuffed? 	could I have been snuffing?
could you have been snuffing?
could he have been snuffing?
could we have been snuffing?
could you have been snuffing?
could they have been snuffing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not snuff?
could you not snuff?
could he not snuff?
could we not snuff?
could you not snuff?
could they not snuff? 	could I not be snuffing?
could you not be snuffing?
could he not be snuffing?
could we not be snuffing?
could you not be snuffing?
could they not be snuffing? 	could I not have snuffed?
could you not have snuffed?
could he not have snuffed?
could we not have snuffed?
could you not have snuffed?
could they not have snuffed? 	could I not have been snuffing?
could you not have been snuffing?
could he not have been snuffing?
could we not have been snuffing?
could you not have been snuffing?
could they not have been snuffing?