I'll be grubstaking you'll be grubstaking he'll be grubstaking we'll be grubstaking you'll be grubstaking they'll be grubstaking
Future perfect
I'll have grubstaked you'll have grubstaked he'll have grubstaked we'll have grubstaked you'll have grubstaked they'll have grubstaked
Future perfect continuous
I'll have been grubstaking you'll have been grubstaking he'll have been grubstaking we'll have been grubstaking you'll have been grubstaking they'll have been grubstaking
I'd be grubstaking you'd be grubstaking he'd be grubstaking we'd be grubstaking you'd be grubstaking they'd be grubstaking
Past
I'd have grubstaked you'd have grubstaked he'd have grubstaked we'd have grubstaked you'd have grubstaked they'd have grubstaked
Past continuous
I'd have been grubstaking you'd have been grubstaking he'd have been grubstaking we'd have been grubstaking you'd have been grubstaking they'd have been grubstaking