could sigh
Verbo regular: sigh - sighed- sighed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sigh
you could sigh
he could sigh
we could sigh
you could sigh
they could sigh 	I could be sighing
you could be sighing
he could be sighing
we could be sighing
you could be sighing
they could be sighing	I could have sighed
you could have sighed
he could have sighed
we could have sighed
you could have sighed
they could have sighed	I could have been sighing
you could have been sighing
he could have been sighing
we could have been sighing
you could have been sighing
they could have been sighing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sigh
you could not sigh
he could not sigh
we could not sigh
you could not sigh
they could not sigh 	I could not be sighing
you could not be sighing
he could not be sighing
we could not be sighing
you could not be sighing
they could not be sighing	I could not have sighed
you could not have sighed
he could not have sighed
we could not have sighed
you could not have sighed
they could not have sighed	I could not have been sighing
you could not have been sighing
he could not have been sighing
we could not have been sighing
you could not have been sighing
they could not have been sighing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sigh?
could you sigh?
could he sigh?
could we sigh?
could you sigh?
could they sigh? 	could I be sighing?
could you be sighing?
could he be sighing?
could we be sighing?
could you be sighing?
could they be sighing? 	could I have sighed?
could you have sighed?
could he have sighed?
could we have sighed?
could you have sighed?
could they have sighed? 	could I have been sighing?
could you have been sighing?
could he have been sighing?
could we have been sighing?
could you have been sighing?
could they have been sighing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sigh?
could you not sigh?
could he not sigh?
could we not sigh?
could you not sigh?
could they not sigh? 	could I not be sighing?
could you not be sighing?
could he not be sighing?
could we not be sighing?
could you not be sighing?
could they not be sighing? 	could I not have sighed?
could you not have sighed?
could he not have sighed?
could we not have sighed?
could you not have sighed?
could they not have sighed? 	could I not have been sighing?
could you not have been sighing?
could he not have been sighing?
could we not have been sighing?
could you not have been sighing?
could they not have been sighing?