I'll be fastening you'll be fastening he'll be fastening we'll be fastening you'll be fastening they'll be fastening
Futuro anteriore
I'll have fastened you'll have fastened he'll have fastened we'll have fastened you'll have fastened they'll have fastened
Futuro anteriore contínuo
I'll have been fastening you'll have been fastening he'll have been fastening we'll have been fastening you'll have been fastening they'll have been fastening
I'd be fastening you'd be fastening he'd be fastening we'd be fastening you'd be fastening they'd be fastening
Passato
I'd have fastened you'd have fastened he'd have fastened we'd have fastened you'd have fastened they'd have fastened
Passato continuo
I'd have been fastening you'd have been fastening he'd have been fastening we'd have been fastening you'd have been fastening they'd have been fastening