should weaken
Verbo regular: weaken - weakened- weakened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd weaken
you'd weaken
he'd weaken
we'd weaken
you'd weaken
they'd weaken 	I'd be weakening
you'd be weakening
he'd be weakening
we'd be weakening
you'd be weakening
they'd be weakening	I should've weakened
you should've weakened
he should've weakened
we should've weakened
you should've weakened
they should've weakened	I should've been weakening
you should've been weakening
he should've been weakening
we should've been weakening
you should've been weakening
they should've been weakening	

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

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

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