could blackball
Verbo regular: blackball - blackballed- blackballed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could blackball
you could blackball
he could blackball
we could blackball
you could blackball
they could blackball 	I could be blackballing
you could be blackballing
he could be blackballing
we could be blackballing
you could be blackballing
they could be blackballing	I could have blackballed
you could have blackballed
he could have blackballed
we could have blackballed
you could have blackballed
they could have blackballed	I could have been blackballing
you could have been blackballing
he could have been blackballing
we could have been blackballing
you could have been blackballing
they could have been blackballing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not blackball
you could not blackball
he could not blackball
we could not blackball
you could not blackball
they could not blackball 	I could not be blackballing
you could not be blackballing
he could not be blackballing
we could not be blackballing
you could not be blackballing
they could not be blackballing	I could not have blackballed
you could not have blackballed
he could not have blackballed
we could not have blackballed
you could not have blackballed
they could not have blackballed	I could not have been blackballing
you could not have been blackballing
he could not have been blackballing
we could not have been blackballing
you could not have been blackballing
they could not have been blackballing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I blackball?
could you blackball?
could he blackball?
could we blackball?
could you blackball?
could they blackball? 	could I be blackballing?
could you be blackballing?
could he be blackballing?
could we be blackballing?
could you be blackballing?
could they be blackballing? 	could I have blackballed?
could you have blackballed?
could he have blackballed?
could we have blackballed?
could you have blackballed?
could they have blackballed? 	could I have been blackballing?
could you have been blackballing?
could he have been blackballing?
could we have been blackballing?
could you have been blackballing?
could they have been blackballing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not blackball?
could you not blackball?
could he not blackball?
could we not blackball?
could you not blackball?
could they not blackball? 	could I not be blackballing?
could you not be blackballing?
could he not be blackballing?
could we not be blackballing?
could you not be blackballing?
could they not be blackballing? 	could I not have blackballed?
could you not have blackballed?
could he not have blackballed?
could we not have blackballed?
could you not have blackballed?
could they not have blackballed? 	could I not have been blackballing?
could you not have been blackballing?
could he not have been blackballing?
could we not have been blackballing?
could you not have been blackballing?
could they not have been blackballing?