I'll be hardening you'll be hardening he'll be hardening we'll be hardening you'll be hardening they'll be hardening
Future perfect
I'll have hardened you'll have hardened he'll have hardened we'll have hardened you'll have hardened they'll have hardened
Future perfect continuous
I'll have been hardening you'll have been hardening he'll have been hardening we'll have been hardening you'll have been hardening they'll have been hardening
I'd be hardening you'd be hardening he'd be hardening we'd be hardening you'd be hardening they'd be hardening
Past
I'd have hardened you'd have hardened he'd have hardened we'd have hardened you'd have hardened they'd have hardened
Past continuous
I'd have been hardening you'd have been hardening he'd have been hardening we'd have been hardening you'd have been hardening they'd have been hardening