could burr
Verbo regular: burr - burred- burred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could burr
you could burr
he could burr
we could burr
you could burr
they could burr 	I could be burring
you could be burring
he could be burring
we could be burring
you could be burring
they could be burring	I could have burred
you could have burred
he could have burred
we could have burred
you could have burred
they could have burred	I could have been burring
you could have been burring
he could have been burring
we could have been burring
you could have been burring
they could have been burring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not burr
you could not burr
he could not burr
we could not burr
you could not burr
they could not burr 	I could not be burring
you could not be burring
he could not be burring
we could not be burring
you could not be burring
they could not be burring	I could not have burred
you could not have burred
he could not have burred
we could not have burred
you could not have burred
they could not have burred	I could not have been burring
you could not have been burring
he could not have been burring
we could not have been burring
you could not have been burring
they could not have been burring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I burr?
could you burr?
could he burr?
could we burr?
could you burr?
could they burr? 	could I be burring?
could you be burring?
could he be burring?
could we be burring?
could you be burring?
could they be burring? 	could I have burred?
could you have burred?
could he have burred?
could we have burred?
could you have burred?
could they have burred? 	could I have been burring?
could you have been burring?
could he have been burring?
could we have been burring?
could you have been burring?
could they have been burring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not burr?
could you not burr?
could he not burr?
could we not burr?
could you not burr?
could they not burr? 	could I not be burring?
could you not be burring?
could he not be burring?
could we not be burring?
could you not be burring?
could they not be burring? 	could I not have burred?
could you not have burred?
could he not have burred?
could we not have burred?
could you not have burred?
could they not have burred? 	could I not have been burring?
could you not have been burring?
could he not have been burring?
could we not have been burring?
could you not have been burring?
could they not have been burring?