could double-space
Verbo regular: double-space - double-spaced- double-spaced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could double-space
you could double-space
he could double-space
we could double-space
you could double-space
they could double-space 	I could be double-spacing
you could be double-spacing
he could be double-spacing
we could be double-spacing
you could be double-spacing
they could be double-spacing	I could have double-spaced
you could have double-spaced
he could have double-spaced
we could have double-spaced
you could have double-spaced
they could have double-spaced	I could have been double-spacing
you could have been double-spacing
he could have been double-spacing
we could have been double-spacing
you could have been double-spacing
they could have been double-spacing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not double-space
you could not double-space
he could not double-space
we could not double-space
you could not double-space
they could not double-space 	I could not be double-spacing
you could not be double-spacing
he could not be double-spacing
we could not be double-spacing
you could not be double-spacing
they could not be double-spacing	I could not have double-spaced
you could not have double-spaced
he could not have double-spaced
we could not have double-spaced
you could not have double-spaced
they could not have double-spaced	I could not have been double-spacing
you could not have been double-spacing
he could not have been double-spacing
we could not have been double-spacing
you could not have been double-spacing
they could not have been double-spacing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I double-space?
could you double-space?
could he double-space?
could we double-space?
could you double-space?
could they double-space? 	could I be double-spacing?
could you be double-spacing?
could he be double-spacing?
could we be double-spacing?
could you be double-spacing?
could they be double-spacing? 	could I have double-spaced?
could you have double-spaced?
could he have double-spaced?
could we have double-spaced?
could you have double-spaced?
could they have double-spaced? 	could I have been double-spacing?
could you have been double-spacing?
could he have been double-spacing?
could we have been double-spacing?
could you have been double-spacing?
could they have been double-spacing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not double-space?
could you not double-space?
could he not double-space?
could we not double-space?
could you not double-space?
could they not double-space? 	could I not be double-spacing?
could you not be double-spacing?
could he not be double-spacing?
could we not be double-spacing?
could you not be double-spacing?
could they not be double-spacing? 	could I not have double-spaced?
could you not have double-spaced?
could he not have double-spaced?
could we not have double-spaced?
could you not have double-spaced?
could they not have double-spaced? 	could I not have been double-spacing?
could you not have been double-spacing?
could he not have been double-spacing?
could we not have been double-spacing?
could you not have been double-spacing?
could they not have been double-spacing?