I'll be countering you'll be countering he'll be countering we'll be countering you'll be countering they'll be countering
Future perfect
I'll have countered you'll have countered he'll have countered we'll have countered you'll have countered they'll have countered
Future perfect continuous
I'll have been countering you'll have been countering he'll have been countering we'll have been countering you'll have been countering they'll have been countering
I'd be countering you'd be countering he'd be countering we'd be countering you'd be countering they'd be countering
Past
I'd have countered you'd have countered he'd have countered we'd have countered you'd have countered they'd have countered
Past continuous
I'd have been countering you'd have been countering he'd have been countering we'd have been countering you'd have been countering they'd have been countering