could foam
Verbo regular: foam - foamed- foamed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could foam
you could foam
she could foam
we could foam
you could foam
they could foam 	I could be foaming
you could be foaming
she could be foaming
we could be foaming
you could be foaming
they could be foaming	I could have foamed
you could have foamed
she could have foamed
we could have foamed
you could have foamed
they could have foamed	I could have been foaming
you could have been foaming
she could have been foaming
we could have been foaming
you could have been foaming
they could have been foaming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not foam
you could not foam
she could not foam
we could not foam
you could not foam
they could not foam 	I could not be foaming
you could not be foaming
she could not be foaming
we could not be foaming
you could not be foaming
they could not be foaming	I could not have foamed
you could not have foamed
she could not have foamed
we could not have foamed
you could not have foamed
they could not have foamed	I could not have been foaming
you could not have been foaming
she could not have been foaming
we could not have been foaming
you could not have been foaming
they could not have been foaming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I foam?
could you foam?
could she foam?
could we foam?
could you foam?
could they foam? 	could I be foaming?
could you be foaming?
could she be foaming?
could we be foaming?
could you be foaming?
could they be foaming? 	could I have foamed?
could you have foamed?
could she have foamed?
could we have foamed?
could you have foamed?
could they have foamed? 	could I have been foaming?
could you have been foaming?
could she have been foaming?
could we have been foaming?
could you have been foaming?
could they have been foaming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not foam?
could you not foam?
could she not foam?
could we not foam?
could you not foam?
could they not foam? 	could I not be foaming?
could you not be foaming?
could she not be foaming?
could we not be foaming?
could you not be foaming?
could they not be foaming? 	could I not have foamed?
could you not have foamed?
could she not have foamed?
could we not have foamed?
could you not have foamed?
could they not have foamed? 	could I not have been foaming?
could you not have been foaming?
could she not have been foaming?
could we not have been foaming?
could you not have been foaming?
could they not have been foaming?