could duet
Verbo regular: duet - dueted- dueted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could duet
you could duet
he could duet
we could duet
you could duet
they could duet 	I could be dueting
you could be dueting
he could be dueting
we could be dueting
you could be dueting
they could be dueting	I could have dueted
you could have dueted
he could have dueted
we could have dueted
you could have dueted
they could have dueted	I could have been dueting
you could have been dueting
he could have been dueting
we could have been dueting
you could have been dueting
they could have been dueting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not duet
you could not duet
he could not duet
we could not duet
you could not duet
they could not duet 	I could not be dueting
you could not be dueting
he could not be dueting
we could not be dueting
you could not be dueting
they could not be dueting	I could not have dueted
you could not have dueted
he could not have dueted
we could not have dueted
you could not have dueted
they could not have dueted	I could not have been dueting
you could not have been dueting
he could not have been dueting
we could not have been dueting
you could not have been dueting
they could not have been dueting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I duet?
could you duet?
could he duet?
could we duet?
could you duet?
could they duet? 	could I be dueting?
could you be dueting?
could he be dueting?
could we be dueting?
could you be dueting?
could they be dueting? 	could I have dueted?
could you have dueted?
could he have dueted?
could we have dueted?
could you have dueted?
could they have dueted? 	could I have been dueting?
could you have been dueting?
could he have been dueting?
could we have been dueting?
could you have been dueting?
could they have been dueting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not duet?
could you not duet?
could he not duet?
could we not duet?
could you not duet?
could they not duet? 	could I not be dueting?
could you not be dueting?
could he not be dueting?
could we not be dueting?
could you not be dueting?
could they not be dueting? 	could I not have dueted?
could you not have dueted?
could he not have dueted?
could we not have dueted?
could you not have dueted?
could they not have dueted? 	could I not have been dueting?
could you not have been dueting?
could he not have been dueting?
could we not have been dueting?
could you not have been dueting?
could they not have been dueting?