shall weaken
Verbo regular: weaken - weakened- weakened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shall weaken
you shall weaken
he shall weaken
we shall weaken
you shall weaken
they shall weaken 	I shall be weakening
you shall be weakening
he shall be weakening
we shall be weakening
you shall be weakening
they shall be weakening	I shall have weakened
you shall have weakened
he shall have weakened
we shall have weakened
you shall have weakened
they shall have weakened	I shall have been weakening
you shall have been weakening
he shall have been weakening
we shall have been weakening
you shall have been weakening
they shall have been weakening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shall not weaken
you shall not weaken
he shall not weaken
we shall not weaken
you shall not weaken
they shall not weaken 	I shall not be weakening
you shall not be weakening
he shall not be weakening
we shall not be weakening
you shall not be weakening
they shall not be weakening	I shall not have weakened
you shall not have weakened
he shall not have weakened
we shall not have weakened
you shall not have weakened
they shall not have weakened	I shall not have been weakening
you shall not have been weakening
he shall not have been weakening
we shall not have been weakening
you shall not have been weakening
they shall not have been weakening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I weaken?
shall you weaken?
shall he weaken?
shall we weaken?
shall you weaken?
shall they weaken? 	shall I be weakening?
shall you be weakening?
shall he be weakening?
shall we be weakening?
shall you be weakening?
shall they be weakening? 	shall I have weakened?
shall you have weakened?
shall he have weakened?
shall we have weakened?
shall you have weakened?
shall they have weakened? 	shall I have been weakening?
shall you have been weakening?
shall he have been weakening?
shall we have been weakening?
shall you have been weakening?
shall they have been weakening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I not weaken?
shall you not weaken?
shall he not weaken?
shall we not weaken?
shall you not weaken?
shall they not weaken? 	shall I not be weakening?
shall you not be weakening?
shall he not be weakening?
shall we not be weakening?
shall you not be weakening?
shall they not be weakening? 	shall I not have weakened?
shall you not have weakened?
shall he not have weakened?
shall we not have weakened?
shall you not have weakened?
shall they not have weakened? 	shall I not have been weakening?
shall you not have been weakening?
shall he not have been weakening?
shall we not have been weakening?
shall you not have been weakening?
shall they not have been weakening?