could obscure
Verbo regular: obscure - obscured- obscured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't obscure
you couldn't obscure
he couldn't obscure
we couldn't obscure
you couldn't obscure
they couldn't obscure 	I couldn't be obscuring
you couldn't be obscuring
he couldn't be obscuring
we couldn't be obscuring
you couldn't be obscuring
they couldn't be obscuring	I couldn't have obscured
you couldn't have obscured
he couldn't have obscured
we couldn't have obscured
you couldn't have obscured
they couldn't have obscured	I couldn't have been obscuring
you couldn't have been obscuring
he couldn't have been obscuring
we couldn't have been obscuring
you couldn't have been obscuring
they couldn't have been obscuring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I obscure?
couldn't you obscure?
couldn't he obscure?
couldn't we obscure?
couldn't you obscure?
couldn't they obscure? 	couldn't I be obscuring?
couldn't you be obscuring?
couldn't he be obscuring?
couldn't we be obscuring?
couldn't you be obscuring?
couldn't they be obscuring? 	couldn't I have obscured?
couldn't you have obscured?
couldn't he have obscured?
couldn't we have obscured?
couldn't you have obscured?
couldn't they have obscured? 	couldn't I have been obscuring?
couldn't you have been obscuring?
couldn't he have been obscuring?
couldn't we have been obscuring?
couldn't you have been obscuring?
couldn't they have been obscuring?