should unfasten
Verbo regular: unfasten - unfastened- unfastened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd unfasten
you'd unfasten
he'd unfasten
we'd unfasten
you'd unfasten
they'd unfasten 	I'd be unfastening
you'd be unfastening
he'd be unfastening
we'd be unfastening
you'd be unfastening
they'd be unfastening	I should've unfastened
you should've unfastened
he should've unfastened
we should've unfastened
you should've unfastened
they should've unfastened	I should've been unfastening
you should've been unfastening
he should've been unfastening
we should've been unfastening
you should've been unfastening
they should've been unfastening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't unfasten
you shouldn't unfasten
he shouldn't unfasten
we shouldn't unfasten
you shouldn't unfasten
they shouldn't unfasten 	I shouldn't be unfastening
you shouldn't be unfastening
he shouldn't be unfastening
we shouldn't be unfastening
you shouldn't be unfastening
they shouldn't be unfastening	I shouldn't have unfastened
you shouldn't have unfastened
he shouldn't have unfastened
we shouldn't have unfastened
you shouldn't have unfastened
they shouldn't have unfastened	I shouldn't have been unfastening
you shouldn't have been unfastening
he shouldn't have been unfastening
we shouldn't have been unfastening
you shouldn't have been unfastening
they shouldn't have been unfastening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I unfasten?
should you unfasten?
should he unfasten?
should we unfasten?
should you unfasten?
should they unfasten? 	should I be unfastening?
should you be unfastening?
should he be unfastening?
should we be unfastening?
should you be unfastening?
should they be unfastening? 	should I have unfastened?
should you have unfastened?
should he have unfastened?
should we have unfastened?
should you have unfastened?
should they have unfastened? 	should I have been unfastening?
should you have been unfastening?
should he have been unfastening?
should we have been unfastening?
should you have been unfastening?
should they have been unfastening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I unfasten?
shouldn't you unfasten?
shouldn't he unfasten?
shouldn't we unfasten?
shouldn't you unfasten?
shouldn't they unfasten? 	shouldn't I be unfastening?
shouldn't you be unfastening?
shouldn't he be unfastening?
shouldn't we be unfastening?
shouldn't you be unfastening?
shouldn't they be unfastening? 	shouldn't I have unfastened?
shouldn't you have unfastened?
shouldn't he have unfastened?
shouldn't we have unfastened?
shouldn't you have unfastened?
shouldn't they have unfastened? 	shouldn't I have been unfastening?
shouldn't you have been unfastening?
shouldn't he have been unfastening?
shouldn't we have been unfastening?
shouldn't you have been unfastening?
shouldn't they have been unfastening?