could waltz
Verbo regular: waltz - waltzed- waltzed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could waltz
you could waltz
he could waltz
we could waltz
you could waltz
they could waltz 	I could be waltzing
you could be waltzing
he could be waltzing
we could be waltzing
you could be waltzing
they could be waltzing	I could have waltzed
you could have waltzed
he could have waltzed
we could have waltzed
you could have waltzed
they could have waltzed	I could have been waltzing
you could have been waltzing
he could have been waltzing
we could have been waltzing
you could have been waltzing
they could have been waltzing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't waltz
you couldn't waltz
he couldn't waltz
we couldn't waltz
you couldn't waltz
they couldn't waltz 	I couldn't be waltzing
you couldn't be waltzing
he couldn't be waltzing
we couldn't be waltzing
you couldn't be waltzing
they couldn't be waltzing	I couldn't have waltzed
you couldn't have waltzed
he couldn't have waltzed
we couldn't have waltzed
you couldn't have waltzed
they couldn't have waltzed	I couldn't have been waltzing
you couldn't have been waltzing
he couldn't have been waltzing
we couldn't have been waltzing
you couldn't have been waltzing
they couldn't have been waltzing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I waltz?
could you waltz?
could he waltz?
could we waltz?
could you waltz?
could they waltz? 	could I be waltzing?
could you be waltzing?
could he be waltzing?
could we be waltzing?
could you be waltzing?
could they be waltzing? 	could I have waltzed?
could you have waltzed?
could he have waltzed?
could we have waltzed?
could you have waltzed?
could they have waltzed? 	could I have been waltzing?
could you have been waltzing?
could he have been waltzing?
could we have been waltzing?
could you have been waltzing?
could they have been waltzing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I waltz?
couldn't you waltz?
couldn't he waltz?
couldn't we waltz?
couldn't you waltz?
couldn't they waltz? 	couldn't I be waltzing?
couldn't you be waltzing?
couldn't he be waltzing?
couldn't we be waltzing?
couldn't you be waltzing?
couldn't they be waltzing? 	couldn't I have waltzed?
couldn't you have waltzed?
couldn't he have waltzed?
couldn't we have waltzed?
couldn't you have waltzed?
couldn't they have waltzed? 	couldn't I have been waltzing?
couldn't you have been waltzing?
couldn't he have been waltzing?
couldn't we have been waltzing?
couldn't you have been waltzing?
couldn't they have been waltzing?