can puff
Verbo regular: puff - puffed- puffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can puff
you can puff
he can puff
we can puff
you can puff
they can puff 	I can be puffing
you can be puffing
he can be puffing
we can be puffing
you can be puffing
they can be puffing	I can have puffed
you can have puffed
he can have puffed
we can have puffed
you can have puffed
they can have puffed	I can have been puffing
you can have been puffing
he can have been puffing
we can have been puffing
you can have been puffing
they can have been puffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot puff
you cannot puff
he cannot puff
we cannot puff
you cannot puff
they cannot puff 	I cannot be puffing
you cannot be puffing
he cannot be puffing
we cannot be puffing
you cannot be puffing
they cannot be puffing	I cannot have puffed
you cannot have puffed
he cannot have puffed
we cannot have puffed
you cannot have puffed
they cannot have puffed	I cannot have been puffing
you cannot have been puffing
he cannot have been puffing
we cannot have been puffing
you cannot have been puffing
they cannot have been puffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I puff?
can you puff?
can he puff?
can we puff?
can you puff?
can they puff? 	can I be puffing?
can you be puffing?
can he be puffing?
can we be puffing?
can you be puffing?
can they be puffing? 	can I have puffed?
can you have puffed?
can he have puffed?
can we have puffed?
can you have puffed?
can they have puffed? 	can I have been puffing?
can you have been puffing?
can he have been puffing?
can we have been puffing?
can you have been puffing?
can they have been puffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not puff?
can you not puff?
can he not puff?
can we not puff?
can you not puff?
can they not puff? 	can I not be puffing?
can you not be puffing?
can he not be puffing?
can we not be puffing?
can you not be puffing?
can they not be puffing? 	can I not have puffed?
can you not have puffed?
can he not have puffed?
can we not have puffed?
can you not have puffed?
can they not have puffed? 	can I not have been puffing?
can you not have been puffing?
can he not have been puffing?
can we not have been puffing?
can you not have been puffing?
can they not have been puffing?