could half-open
Verbo regular: half-open - half-opened- half-opened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could half-open
you could half-open
he could half-open
we could half-open
you could half-open
they could half-open 	I could be half-opening
you could be half-opening
he could be half-opening
we could be half-opening
you could be half-opening
they could be half-opening	I could have half-opened
you could have half-opened
he could have half-opened
we could have half-opened
you could have half-opened
they could have half-opened	I could have been half-opening
you could have been half-opening
he could have been half-opening
we could have been half-opening
you could have been half-opening
they could have been half-opening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not half-open
you could not half-open
he could not half-open
we could not half-open
you could not half-open
they could not half-open 	I could not be half-opening
you could not be half-opening
he could not be half-opening
we could not be half-opening
you could not be half-opening
they could not be half-opening	I could not have half-opened
you could not have half-opened
he could not have half-opened
we could not have half-opened
you could not have half-opened
they could not have half-opened	I could not have been half-opening
you could not have been half-opening
he could not have been half-opening
we could not have been half-opening
you could not have been half-opening
they could not have been half-opening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I half-open?
could you half-open?
could he half-open?
could we half-open?
could you half-open?
could they half-open? 	could I be half-opening?
could you be half-opening?
could he be half-opening?
could we be half-opening?
could you be half-opening?
could they be half-opening? 	could I have half-opened?
could you have half-opened?
could he have half-opened?
could we have half-opened?
could you have half-opened?
could they have half-opened? 	could I have been half-opening?
could you have been half-opening?
could he have been half-opening?
could we have been half-opening?
could you have been half-opening?
could they have been half-opening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not half-open?
could you not half-open?
could he not half-open?
could we not half-open?
could you not half-open?
could they not half-open? 	could I not be half-opening?
could you not be half-opening?
could he not be half-opening?
could we not be half-opening?
could you not be half-opening?
could they not be half-opening? 	could I not have half-opened?
could you not have half-opened?
could he not have half-opened?
could we not have half-opened?
could you not have half-opened?
could they not have half-opened? 	could I not have been half-opening?
could you not have been half-opening?
could he not have been half-opening?
could we not have been half-opening?
could you not have been half-opening?
could they not have been half-opening?