should fasten
Verbo regolare: fasten - fastened- fastened

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I should fasten
you should fasten
he should fasten
we should fasten
you should fasten
they should fasten 	I should be fastening
you should be fastening
he should be fastening
we should be fastening
you should be fastening
they should be fastening	I should have fastened
you should have fastened
he should have fastened
we should have fastened
you should have fastened
they should have fastened	I should have been fastening
you should have been fastening
he should have been fastening
we should have been fastening
you should have been fastening
they should have been fastening	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I should not fasten
you should not fasten
he should not fasten
we should not fasten
you should not fasten
they should not fasten 	I should not be fastening
you should not be fastening
he should not be fastening
we should not be fastening
you should not be fastening
they should not be fastening	I should not have fastened
you should not have fastened
he should not have fastened
we should not have fastened
you should not have fastened
they should not have fastened	I should not have been fastening
you should not have been fastening
he should not have been fastening
we should not have been fastening
you should not have been fastening
they should not have been fastening	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
should I fasten?
should you fasten?
should he fasten?
should we fasten?
should you fasten?
should they fasten? 	should I be fastening?
should you be fastening?
should he be fastening?
should we be fastening?
should you be fastening?
should they be fastening? 	should I have fastened?
should you have fastened?
should he have fastened?
should we have fastened?
should you have fastened?
should they have fastened? 	should I have been fastening?
should you have been fastening?
should he have been fastening?
should we have been fastening?
should you have been fastening?
should they have been fastening? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
should I not fasten?
should you not fasten?
should he not fasten?
should we not fasten?
should you not fasten?
should they not fasten? 	should I not be fastening?
should you not be fastening?
should he not be fastening?
should we not be fastening?
should you not be fastening?
should they not be fastening? 	should I not have fastened?
should you not have fastened?
should he not have fastened?
should we not have fastened?
should you not have fastened?
should they not have fastened? 	should I not have been fastening?
should you not have been fastening?
should he not have been fastening?
should we not have been fastening?
should you not have been fastening?
should they not have been fastening?