should unfasten
Verbo regular: unfasten - unfastened- unfastened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should unfasten
you should unfasten
she should unfasten
we should unfasten
you should unfasten
they should unfasten 	I should be unfastening
you should be unfastening
she should be unfastening
we should be unfastening
you should be unfastening
they should be unfastening	I should have unfastened
you should have unfastened
she should have unfastened
we should have unfastened
you should have unfastened
they should have unfastened	I should have been unfastening
you should have been unfastening
she should have been unfastening
we should have been unfastening
you should have been unfastening
they should have been unfastening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not unfasten
you should not unfasten
she should not unfasten
we should not unfasten
you should not unfasten
they should not unfasten 	I should not be unfastening
you should not be unfastening
she should not be unfastening
we should not be unfastening
you should not be unfastening
they should not be unfastening	I should not have unfastened
you should not have unfastened
she should not have unfastened
we should not have unfastened
you should not have unfastened
they should not have unfastened	I should not have been unfastening
you should not have been unfastening
she should not have been unfastening
we should not have been unfastening
you should not have been unfastening
they should not have been unfastening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I unfasten?
should you unfasten?
should she unfasten?
should we unfasten?
should you unfasten?
should they unfasten? 	should I be unfastening?
should you be unfastening?
should she be unfastening?
should we be unfastening?
should you be unfastening?
should they be unfastening? 	should I have unfastened?
should you have unfastened?
should she 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 she have been unfastening?
should we have been unfastening?
should you have been unfastening?
should they have been unfastening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not unfasten?
should you not unfasten?
should she not unfasten?
should we not unfasten?
should you not unfasten?
should they not unfasten? 	should I not be unfastening?
should you not be unfastening?
should she not be unfastening?
should we not be unfastening?
should you not be unfastening?
should they not be unfastening? 	should I not have unfastened?
should you not have unfastened?
should she not have unfastened?
should we not have unfastened?
should you not have unfastened?
should they not have unfastened? 	should I not have been unfastening?
should you not have been unfastening?
should she not have been unfastening?
should we not have been unfastening?
should you not have been unfastening?
should they not have been unfastening?