I'll be bittering you'll be bittering he'll be bittering we'll be bittering you'll be bittering they'll be bittering
Future perfect
I'll have bittered you'll have bittered he'll have bittered we'll have bittered you'll have bittered they'll have bittered
Future perfect continuous
I'll have been bittering you'll have been bittering he'll have been bittering we'll have been bittering you'll have been bittering they'll have been bittering
I'd be bittering you'd be bittering he'd be bittering we'd be bittering you'd be bittering they'd be bittering
Past
I'd have bittered you'd have bittered he'd have bittered we'd have bittered you'd have bittered they'd have bittered
Past continuous
I'd have been bittering you'd have been bittering he'd have been bittering we'd have been bittering you'd have been bittering they'd have been bittering