I'll be slumbering you'll be slumbering he'll be slumbering we'll be slumbering you'll be slumbering they'll be slumbering
Future perfect
I'll have slumbered you'll have slumbered he'll have slumbered we'll have slumbered you'll have slumbered they'll have slumbered
Future perfect continuous
I'll have been slumbering you'll have been slumbering he'll have been slumbering we'll have been slumbering you'll have been slumbering they'll have been slumbering
I'd be slumbering you'd be slumbering he'd be slumbering we'd be slumbering you'd be slumbering they'd be slumbering
Past
I'd have slumbered you'd have slumbered he'd have slumbered we'd have slumbered you'd have slumbered they'd have slumbered
Past continuous
I'd have been slumbering you'd have been slumbering he'd have been slumbering we'd have been slumbering you'd have been slumbering they'd have been slumbering