could woof
Verbo regular: woof - woofed- woofed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could woof
you could woof
he could woof
we could woof
you could woof
they could woof 	I could be woofing
you could be woofing
he could be woofing
we could be woofing
you could be woofing
they could be woofing	I could have woofed
you could have woofed
he could have woofed
we could have woofed
you could have woofed
they could have woofed	I could have been woofing
you could have been woofing
he could have been woofing
we could have been woofing
you could have been woofing
they could have been woofing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't woof
you couldn't woof
he couldn't woof
we couldn't woof
you couldn't woof
they couldn't woof 	I couldn't be woofing
you couldn't be woofing
he couldn't be woofing
we couldn't be woofing
you couldn't be woofing
they couldn't be woofing	I couldn't have woofed
you couldn't have woofed
he couldn't have woofed
we couldn't have woofed
you couldn't have woofed
they couldn't have woofed	I couldn't have been woofing
you couldn't have been woofing
he couldn't have been woofing
we couldn't have been woofing
you couldn't have been woofing
they couldn't have been woofing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I woof?
could you woof?
could he woof?
could we woof?
could you woof?
could they woof? 	could I be woofing?
could you be woofing?
could he be woofing?
could we be woofing?
could you be woofing?
could they be woofing? 	could I have woofed?
could you have woofed?
could he have woofed?
could we have woofed?
could you have woofed?
could they have woofed? 	could I have been woofing?
could you have been woofing?
could he have been woofing?
could we have been woofing?
could you have been woofing?
could they have been woofing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I woof?
couldn't you woof?
couldn't he woof?
couldn't we woof?
couldn't you woof?
couldn't they woof? 	couldn't I be woofing?
couldn't you be woofing?
couldn't he be woofing?
couldn't we be woofing?
couldn't you be woofing?
couldn't they be woofing? 	couldn't I have woofed?
couldn't you have woofed?
couldn't he have woofed?
couldn't we have woofed?
couldn't you have woofed?
couldn't they have woofed? 	couldn't I have been woofing?
couldn't you have been woofing?
couldn't he have been woofing?
couldn't we have been woofing?
couldn't you have been woofing?
couldn't they have been woofing?