shall weaken
Verbo regular: weaken - weakened- weakened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'll weaken
you'll weaken
she'll weaken
we'll weaken
you'll weaken
they'll weaken 	I'll be weakening
you'll be weakening
she'll be weakening
we'll be weakening
you'll be weakening
they'll be weakening	I'll have weakened
you'll have weakened
she'll have weakened
we'll have weakened
you'll have weakened
they'll have weakened	I'll have been weakening
you'll have been weakening
she'll have been weakening
we'll have been weakening
you'll have been weakening
they'll have been weakening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shan't weaken
you shan't weaken
she shan't weaken
we shan't weaken
you shan't weaken
they shan't weaken 	I shan't be weakening
you shan't be weakening
she shan't be weakening
we shan't be weakening
you shan't be weakening
they shan't be weakening	I shan't have weakened
you shan't have weakened
she shan't have weakened
we shan't have weakened
you shan't have weakened
they shan't have weakened	I shan't have been weakening
you shan't have been weakening
she shan't have been weakening
we shan't have been weakening
you shan't have been weakening
they shan't have been weakening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shall I weaken?
shall you weaken?
shall she weaken?
shall we weaken?
shall you weaken?
shall they weaken? 	shall I be weakening?
shall you be weakening?
shall she be weakening?
shall we be weakening?
shall you be weakening?
shall they be weakening? 	shall I have weakened?
shall you have weakened?
shall she 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 she have been weakening?
shall we have been weakening?
shall you have been weakening?
shall they have been weakening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shan't I weaken?
shan't you weaken?
shan't she weaken?
shan't we weaken?
shan't you weaken?
shan't they weaken? 	shan't I be weakening?
shan't you be weakening?
shan't she be weakening?
shan't we be weakening?
shan't you be weakening?
shan't they be weakening? 	shan't I have weakened?
shan't you have weakened?
shan't she have weakened?
shan't we have weakened?
shan't you have weakened?
shan't they have weakened? 	shan't I have been weakening?
shan't you have been weakening?
shan't she have been weakening?
shan't we have been weakening?
shan't you have been weakening?
shan't they have been weakening?