could obscure
Verbo regular: obscure - obscured- obscured

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could obscure
you could obscure
he could obscure
we could obscure
you could obscure
they could obscure 	I could be obscuring
you could be obscuring
he could be obscuring
we could be obscuring
you could be obscuring
they could be obscuring	I could have obscured
you could have obscured
he could have obscured
we could have obscured
you could have obscured
they could have obscured	I could have been obscuring
you could have been obscuring
he could have been obscuring
we could have been obscuring
you could have been obscuring
they could have been obscuring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not obscure
you could not obscure
he could not obscure
we could not obscure
you could not obscure
they could not obscure 	I could not be obscuring
you could not be obscuring
he could not be obscuring
we could not be obscuring
you could not be obscuring
they could not be obscuring	I could not have obscured
you could not have obscured
he could not have obscured
we could not have obscured
you could not have obscured
they could not have obscured	I could not have been obscuring
you could not have been obscuring
he could not have been obscuring
we could not have been obscuring
you could not have been obscuring
they could not have been obscuring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I obscure?
could you obscure?
could he obscure?
could we obscure?
could you obscure?
could they obscure? 	could I be obscuring?
could you be obscuring?
could he be obscuring?
could we be obscuring?
could you be obscuring?
could they be obscuring? 	could I have obscured?
could you have obscured?
could he have obscured?
could we have obscured?
could you have obscured?
could they have obscured? 	could I have been obscuring?
could you have been obscuring?
could he have been obscuring?
could we have been obscuring?
could you have been obscuring?
could they have been obscuring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not obscure?
could you not obscure?
could he not obscure?
could we not obscure?
could you not obscure?
could they not obscure? 	could I not be obscuring?
could you not be obscuring?
could he not be obscuring?
could we not be obscuring?
could you not be obscuring?
could they not be obscuring? 	could I not have obscured?
could you not have obscured?
could he not have obscured?
could we not have obscured?
could you not have obscured?
could they not have obscured? 	could I not have been obscuring?
could you not have been obscuring?
could he not have been obscuring?
could we not have been obscuring?
could you not have been obscuring?
could they not have been obscuring?