could degrease
Verbo regular: degrease - degreased- degreased

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could degrease
you could degrease
he could degrease
we could degrease
you could degrease
they could degrease 	I could be degreasing
you could be degreasing
he could be degreasing
we could be degreasing
you could be degreasing
they could be degreasing	I could have degreased
you could have degreased
he could have degreased
we could have degreased
you could have degreased
they could have degreased	I could have been degreasing
you could have been degreasing
he could have been degreasing
we could have been degreasing
you could have been degreasing
they could have been degreasing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't degrease
you couldn't degrease
he couldn't degrease
we couldn't degrease
you couldn't degrease
they couldn't degrease 	I couldn't be degreasing
you couldn't be degreasing
he couldn't be degreasing
we couldn't be degreasing
you couldn't be degreasing
they couldn't be degreasing	I couldn't have degreased
you couldn't have degreased
he couldn't have degreased
we couldn't have degreased
you couldn't have degreased
they couldn't have degreased	I couldn't have been degreasing
you couldn't have been degreasing
he couldn't have been degreasing
we couldn't have been degreasing
you couldn't have been degreasing
they couldn't have been degreasing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I degrease?
could you degrease?
could he degrease?
could we degrease?
could you degrease?
could they degrease? 	could I be degreasing?
could you be degreasing?
could he be degreasing?
could we be degreasing?
could you be degreasing?
could they be degreasing? 	could I have degreased?
could you have degreased?
could he have degreased?
could we have degreased?
could you have degreased?
could they have degreased? 	could I have been degreasing?
could you have been degreasing?
could he have been degreasing?
could we have been degreasing?
could you have been degreasing?
could they have been degreasing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I degrease?
couldn't you degrease?
couldn't he degrease?
couldn't we degrease?
couldn't you degrease?
couldn't they degrease? 	couldn't I be degreasing?
couldn't you be degreasing?
couldn't he be degreasing?
couldn't we be degreasing?
couldn't you be degreasing?
couldn't they be degreasing? 	couldn't I have degreased?
couldn't you have degreased?
couldn't he have degreased?
couldn't we have degreased?
couldn't you have degreased?
couldn't they have degreased? 	couldn't I have been degreasing?
couldn't you have been degreasing?
couldn't he have been degreasing?
couldn't we have been degreasing?
couldn't you have been degreasing?
couldn't they have been degreasing?