should slacken
Verbo regular: slacken - slackened- slackened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd slacken
you'd slacken
he'd slacken
we'd slacken
you'd slacken
they'd slacken 	I'd be slackening
you'd be slackening
he'd be slackening
we'd be slackening
you'd be slackening
they'd be slackening	I should've slackened
you should've slackened
he should've slackened
we should've slackened
you should've slackened
they should've slackened	I should've been slackening
you should've been slackening
he should've been slackening
we should've been slackening
you should've been slackening
they should've been slackening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't slacken
you shouldn't slacken
he shouldn't slacken
we shouldn't slacken
you shouldn't slacken
they shouldn't slacken 	I shouldn't be slackening
you shouldn't be slackening
he shouldn't be slackening
we shouldn't be slackening
you shouldn't be slackening
they shouldn't be slackening	I shouldn't have slackened
you shouldn't have slackened
he shouldn't have slackened
we shouldn't have slackened
you shouldn't have slackened
they shouldn't have slackened	I shouldn't have been slackening
you shouldn't have been slackening
he shouldn't have been slackening
we shouldn't have been slackening
you shouldn't have been slackening
they shouldn't have been slackening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I slacken?
should you slacken?
should he slacken?
should we slacken?
should you slacken?
should they slacken? 	should I be slackening?
should you be slackening?
should he be slackening?
should we be slackening?
should you be slackening?
should they be slackening? 	should I have slackened?
should you have slackened?
should he have slackened?
should we have slackened?
should you have slackened?
should they have slackened? 	should I have been slackening?
should you have been slackening?
should he have been slackening?
should we have been slackening?
should you have been slackening?
should they have been slackening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I slacken?
shouldn't you slacken?
shouldn't he slacken?
shouldn't we slacken?
shouldn't you slacken?
shouldn't they slacken? 	shouldn't I be slackening?
shouldn't you be slackening?
shouldn't he be slackening?
shouldn't we be slackening?
shouldn't you be slackening?
shouldn't they be slackening? 	shouldn't I have slackened?
shouldn't you have slackened?
shouldn't he have slackened?
shouldn't we have slackened?
shouldn't you have slackened?
shouldn't they have slackened? 	shouldn't I have been slackening?
shouldn't you have been slackening?
shouldn't he have been slackening?
shouldn't we have been slackening?
shouldn't you have been slackening?
shouldn't they have been slackening?