could ballast
Verbo regular: ballast - ballasted- ballasted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could ballast
you could ballast
he could ballast
we could ballast
you could ballast
they could ballast 	I could be ballasting
you could be ballasting
he could be ballasting
we could be ballasting
you could be ballasting
they could be ballasting	I could have ballasted
you could have ballasted
he could have ballasted
we could have ballasted
you could have ballasted
they could have ballasted	I could have been ballasting
you could have been ballasting
he could have been ballasting
we could have been ballasting
you could have been ballasting
they could have been ballasting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not ballast
you could not ballast
he could not ballast
we could not ballast
you could not ballast
they could not ballast 	I could not be ballasting
you could not be ballasting
he could not be ballasting
we could not be ballasting
you could not be ballasting
they could not be ballasting	I could not have ballasted
you could not have ballasted
he could not have ballasted
we could not have ballasted
you could not have ballasted
they could not have ballasted	I could not have been ballasting
you could not have been ballasting
he could not have been ballasting
we could not have been ballasting
you could not have been ballasting
they could not have been ballasting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I ballast?
could you ballast?
could he ballast?
could we ballast?
could you ballast?
could they ballast? 	could I be ballasting?
could you be ballasting?
could he be ballasting?
could we be ballasting?
could you be ballasting?
could they be ballasting? 	could I have ballasted?
could you have ballasted?
could he have ballasted?
could we have ballasted?
could you have ballasted?
could they have ballasted? 	could I have been ballasting?
could you have been ballasting?
could he have been ballasting?
could we have been ballasting?
could you have been ballasting?
could they have been ballasting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not ballast?
could you not ballast?
could he not ballast?
could we not ballast?
could you not ballast?
could they not ballast? 	could I not be ballasting?
could you not be ballasting?
could he not be ballasting?
could we not be ballasting?
could you not be ballasting?
could they not be ballasting? 	could I not have ballasted?
could you not have ballasted?
could he not have ballasted?
could we not have ballasted?
could you not have ballasted?
could they not have ballasted? 	could I not have been ballasting?
could you not have been ballasting?
could he not have been ballasting?
could we not have been ballasting?
could you not have been ballasting?
could they not have been ballasting?