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
she could sigh
we could sigh
you could sigh
they could sigh 	I could be sighing
you could be sighing
she could be sighing
we could be sighing
you could be sighing
they could be sighing	I could have sighed
you could have sighed
she 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
she 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 couldn't sigh
you couldn't sigh
she couldn't sigh
we couldn't sigh
you couldn't sigh
they couldn't sigh 	I couldn't be sighing
you couldn't be sighing
she couldn't be sighing
we couldn't be sighing
you couldn't be sighing
they couldn't be sighing	I couldn't have sighed
you couldn't have sighed
she couldn't have sighed
we couldn't have sighed
you couldn't have sighed
they couldn't have sighed	I couldn't have been sighing
you couldn't have been sighing
she couldn't have been sighing
we couldn't have been sighing
you couldn't have been sighing
they couldn't have been sighing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sigh?
could you sigh?
could she sigh?
could we sigh?
could you sigh?
could they sigh? 	could I be sighing?
could you be sighing?
could she be sighing?
could we be sighing?
could you be sighing?
could they be sighing? 	could I have sighed?
could you have sighed?
could she 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 she 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 	
couldn't I sigh?
couldn't you sigh?
couldn't she sigh?
couldn't we sigh?
couldn't you sigh?
couldn't they sigh? 	couldn't I be sighing?
couldn't you be sighing?
couldn't she be sighing?
couldn't we be sighing?
couldn't you be sighing?
couldn't they be sighing? 	couldn't I have sighed?
couldn't you have sighed?
couldn't she have sighed?
couldn't we have sighed?
couldn't you have sighed?
couldn't they have sighed? 	couldn't I have been sighing?
couldn't you have been sighing?
couldn't she have been sighing?
couldn't we have been sighing?
couldn't you have been sighing?
couldn't they have been sighing?