I'll be fastening you'll be fastening she'll be fastening we'll be fastening you'll be fastening they'll be fastening
futuro perfeito
I'll have fastened you'll have fastened she'll have fastened we'll have fastened you'll have fastened they'll have fastened
futuro perfeito contínuo
I'll have been fastening you'll have been fastening she'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 she'd be fastening we'd be fastening you'd be fastening they'd be fastening
Passado
I'd have fastened you'd have fastened she'd have fastened we'd have fastened you'd have fastened they'd have fastened
Passado contínuo
I'd have been fastening you'd have been fastening she'd have been fastening we'd have been fastening you'd have been fastening they'd have been fastening