could rebut
Verbo regular: rebut - rebuted- rebuted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could rebut
you could rebut
he could rebut
we could rebut
you could rebut
they could rebut 	I could be rebuting
you could be rebuting
he could be rebuting
we could be rebuting
you could be rebuting
they could be rebuting	I could have rebuted
you could have rebuted
he could have rebuted
we could have rebuted
you could have rebuted
they could have rebuted	I could have been rebuting
you could have been rebuting
he could have been rebuting
we could have been rebuting
you could have been rebuting
they could have been rebuting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not rebut
you could not rebut
he could not rebut
we could not rebut
you could not rebut
they could not rebut 	I could not be rebuting
you could not be rebuting
he could not be rebuting
we could not be rebuting
you could not be rebuting
they could not be rebuting	I could not have rebuted
you could not have rebuted
he could not have rebuted
we could not have rebuted
you could not have rebuted
they could not have rebuted	I could not have been rebuting
you could not have been rebuting
he could not have been rebuting
we could not have been rebuting
you could not have been rebuting
they could not have been rebuting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I rebut?
could you rebut?
could he rebut?
could we rebut?
could you rebut?
could they rebut? 	could I be rebuting?
could you be rebuting?
could he be rebuting?
could we be rebuting?
could you be rebuting?
could they be rebuting? 	could I have rebuted?
could you have rebuted?
could he have rebuted?
could we have rebuted?
could you have rebuted?
could they have rebuted? 	could I have been rebuting?
could you have been rebuting?
could he have been rebuting?
could we have been rebuting?
could you have been rebuting?
could they have been rebuting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not rebut?
could you not rebut?
could he not rebut?
could we not rebut?
could you not rebut?
could they not rebut? 	could I not be rebuting?
could you not be rebuting?
could he not be rebuting?
could we not be rebuting?
could you not be rebuting?
could they not be rebuting? 	could I not have rebuted?
could you not have rebuted?
could he not have rebuted?
could we not have rebuted?
could you not have rebuted?
could they not have rebuted? 	could I not have been rebuting?
could you not have been rebuting?
could he not have been rebuting?
could we not have been rebuting?
could you not have been rebuting?
could they not have been rebuting?