could embitter
Verbo regular: embitter - embittered- embittered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could embitter
you could embitter
she could embitter
we could embitter
you could embitter
they could embitter 	I could be embittering
you could be embittering
she could be embittering
we could be embittering
you could be embittering
they could be embittering	I could have embittered
you could have embittered
she could have embittered
we could have embittered
you could have embittered
they could have embittered	I could have been embittering
you could have been embittering
she could have been embittering
we could have been embittering
you could have been embittering
they could have been embittering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not embitter
you could not embitter
she could not embitter
we could not embitter
you could not embitter
they could not embitter 	I could not be embittering
you could not be embittering
she could not be embittering
we could not be embittering
you could not be embittering
they could not be embittering	I could not have embittered
you could not have embittered
she could not have embittered
we could not have embittered
you could not have embittered
they could not have embittered	I could not have been embittering
you could not have been embittering
she could not have been embittering
we could not have been embittering
you could not have been embittering
they could not have been embittering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I embitter?
could you embitter?
could she embitter?
could we embitter?
could you embitter?
could they embitter? 	could I be embittering?
could you be embittering?
could she be embittering?
could we be embittering?
could you be embittering?
could they be embittering? 	could I have embittered?
could you have embittered?
could she have embittered?
could we have embittered?
could you have embittered?
could they have embittered? 	could I have been embittering?
could you have been embittering?
could she have been embittering?
could we have been embittering?
could you have been embittering?
could they have been embittering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not embitter?
could you not embitter?
could she not embitter?
could we not embitter?
could you not embitter?
could they not embitter? 	could I not be embittering?
could you not be embittering?
could she not be embittering?
could we not be embittering?
could you not be embittering?
could they not be embittering? 	could I not have embittered?
could you not have embittered?
could she not have embittered?
could we not have embittered?
could you not have embittered?
could they not have embittered? 	could I not have been embittering?
could you not have been embittering?
could she not have been embittering?
could we not have been embittering?
could you not have been embittering?
could they not have been embittering?