should blacken
Verbo regular: blacken - blackened- blackened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should blacken
you should blacken
he should blacken
we should blacken
you should blacken
they should blacken 	I should be blackening
you should be blackening
he should be blackening
we should be blackening
you should be blackening
they should be blackening	I should have blackened
you should have blackened
he should have blackened
we should have blackened
you should have blackened
they should have blackened	I should have been blackening
you should have been blackening
he should have been blackening
we should have been blackening
you should have been blackening
they should have been blackening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not blacken
you should not blacken
he should not blacken
we should not blacken
you should not blacken
they should not blacken 	I should not be blackening
you should not be blackening
he should not be blackening
we should not be blackening
you should not be blackening
they should not be blackening	I should not have blackened
you should not have blackened
he should not have blackened
we should not have blackened
you should not have blackened
they should not have blackened	I should not have been blackening
you should not have been blackening
he should not have been blackening
we should not have been blackening
you should not have been blackening
they should not have been blackening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I blacken?
should you blacken?
should he blacken?
should we blacken?
should you blacken?
should they blacken? 	should I be blackening?
should you be blackening?
should he be blackening?
should we be blackening?
should you be blackening?
should they be blackening? 	should I have blackened?
should you have blackened?
should he have blackened?
should we have blackened?
should you have blackened?
should they have blackened? 	should I have been blackening?
should you have been blackening?
should he have been blackening?
should we have been blackening?
should you have been blackening?
should they have been blackening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not blacken?
should you not blacken?
should he not blacken?
should we not blacken?
should you not blacken?
should they not blacken? 	should I not be blackening?
should you not be blackening?
should he not be blackening?
should we not be blackening?
should you not be blackening?
should they not be blackening? 	should I not have blackened?
should you not have blackened?
should he not have blackened?
should we not have blackened?
should you not have blackened?
should they not have blackened? 	should I not have been blackening?
should you not have been blackening?
should he not have been blackening?
should we not have been blackening?
should you not have been blackening?
should they not have been blackening?