should weaken
Verbo regular: weaken - weakened- weakened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd weaken
you'd weaken
she'd weaken
we'd weaken
you'd weaken
they'd weaken 	I'd be weakening
you'd be weakening
she'd be weakening
we'd be weakening
you'd be weakening
they'd be weakening	I should've weakened
you should've weakened
she 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
she should've been weakening
we should've been weakening
you should've been weakening
they should've been weakening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't weaken
you shouldn't weaken
she 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
she 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
she 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
she 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 con V-ing 	Perfecto 	Perfecto con V-ing 	
should I weaken?
should you weaken?
should she weaken?
should we weaken?
should you weaken?
should they weaken? 	should I be weakening?
should you be weakening?
should she be weakening?
should we be weakening?
should you be weakening?
should they be weakening? 	should I have weakened?
should you have weakened?
should she 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 she have been weakening?
should we have been weakening?
should you have been weakening?
should they have been weakening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I weaken?
shouldn't you weaken?
shouldn't she 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 she 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 she 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 she have been weakening?
shouldn't we have been weakening?
shouldn't you have been weakening?
shouldn't they have been weakening?