shall retroact
Verbo regular: retroact - retroacted- retroacted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shall retroact
you shall retroact
he shall retroact
we shall retroact
you shall retroact
they shall retroact 	I shall be retroacting
you shall be retroacting
he shall be retroacting
we shall be retroacting
you shall be retroacting
they shall be retroacting	I shall have retroacted
you shall have retroacted
he shall have retroacted
we shall have retroacted
you shall have retroacted
they shall have retroacted	I shall have been retroacting
you shall have been retroacting
he shall have been retroacting
we shall have been retroacting
you shall have been retroacting
they shall have been retroacting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shall not retroact
you shall not retroact
he shall not retroact
we shall not retroact
you shall not retroact
they shall not retroact 	I shall not be retroacting
you shall not be retroacting
he shall not be retroacting
we shall not be retroacting
you shall not be retroacting
they shall not be retroacting	I shall not have retroacted
you shall not have retroacted
he shall not have retroacted
we shall not have retroacted
you shall not have retroacted
they shall not have retroacted	I shall not have been retroacting
you shall not have been retroacting
he shall not have been retroacting
we shall not have been retroacting
you shall not have been retroacting
they shall not have been retroacting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I retroact?
shall you retroact?
shall he retroact?
shall we retroact?
shall you retroact?
shall they retroact? 	shall I be retroacting?
shall you be retroacting?
shall he be retroacting?
shall we be retroacting?
shall you be retroacting?
shall they be retroacting? 	shall I have retroacted?
shall you have retroacted?
shall he have retroacted?
shall we have retroacted?
shall you have retroacted?
shall they have retroacted? 	shall I have been retroacting?
shall you have been retroacting?
shall he have been retroacting?
shall we have been retroacting?
shall you have been retroacting?
shall they have been retroacting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I not retroact?
shall you not retroact?
shall he not retroact?
shall we not retroact?
shall you not retroact?
shall they not retroact? 	shall I not be retroacting?
shall you not be retroacting?
shall he not be retroacting?
shall we not be retroacting?
shall you not be retroacting?
shall they not be retroacting? 	shall I not have retroacted?
shall you not have retroacted?
shall he not have retroacted?
shall we not have retroacted?
shall you not have retroacted?
shall they not have retroacted? 	shall I not have been retroacting?
shall you not have been retroacting?
shall he not have been retroacting?
shall we not have been retroacting?
shall you not have been retroacting?
shall they not have been retroacting?