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 could not waltz
you could not waltz
he could not waltz
we could not waltz
you could not waltz
they could not waltz 	I could not be waltzing
you could not be waltzing
he could not be waltzing
we could not be waltzing
you could not be waltzing
they could not be waltzing	I could not have waltzed
you could not have waltzed
he could not have waltzed
we could not have waltzed
you could not have waltzed
they could not have waltzed	I could not have been waltzing
you could not have been waltzing
he could not have been waltzing
we could not have been waltzing
you could not have been waltzing
they could not 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 	
could I not waltz?
could you not waltz?
could he not waltz?
could we not waltz?
could you not waltz?
could they not waltz? 	could I not be waltzing?
could you not be waltzing?
could he not be waltzing?
could we not be waltzing?
could you not be waltzing?
could they not be waltzing? 	could I not have waltzed?
could you not have waltzed?
could he not have waltzed?
could we not have waltzed?
could you not have waltzed?
could they not have waltzed? 	could I not have been waltzing?
could you not have been waltzing?
could he not have been waltzing?
could we not have been waltzing?
could you not have been waltzing?
could they not have been waltzing?