could ballast
Verbo regular: ballast - ballasted- ballasted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't ballast
you couldn't ballast
he couldn't ballast
we couldn't ballast
you couldn't ballast
they couldn't ballast 	I couldn't be ballasting
you couldn't be ballasting
he couldn't be ballasting
we couldn't be ballasting
you couldn't be ballasting
they couldn't be ballasting	I couldn't have ballasted
you couldn't have ballasted
he couldn't have ballasted
we couldn't have ballasted
you couldn't have ballasted
they couldn't have ballasted	I couldn't have been ballasting
you couldn't have been ballasting
he couldn't have been ballasting
we couldn't have been ballasting
you couldn't have been ballasting
they couldn't have been ballasting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I ballast?
couldn't you ballast?
couldn't he ballast?
couldn't we ballast?
couldn't you ballast?
couldn't they ballast? 	couldn't I be ballasting?
couldn't you be ballasting?
couldn't he be ballasting?
couldn't we be ballasting?
couldn't you be ballasting?
couldn't they be ballasting? 	couldn't I have ballasted?
couldn't you have ballasted?
couldn't he have ballasted?
couldn't we have ballasted?
couldn't you have ballasted?
couldn't they have ballasted? 	couldn't I have been ballasting?
couldn't you have been ballasting?
couldn't he have been ballasting?
couldn't we have been ballasting?
couldn't you have been ballasting?
couldn't they have been ballasting?