I'd been centering you'd been centering he'd been centering we'd been centering you'd been centering they'd been centering
Future
I'll center you'll center he'll center we'll center you'll center they'll center
Future continuous
I'll be centering you'll be centering he'll be centering we'll be centering you'll be centering they'll be centering
Future perfect
I'll have centered you'll have centered he'll have centered we'll have centered you'll have centered they'll have centered
Future perfect continuous
I'll have been centering you'll have been centering he'll have been centering we'll have been centering you'll have been centering they'll have been centering
Conditional
Present
I'd center you'd center he'd center we'd center you'd center they'd center
Present continuous
I'd be centering you'd be centering he'd be centering we'd be centering you'd be centering they'd be centering
Past
I'd have centered you'd have centered he'd have centered we'd have centered you'd have centered they'd have centered
Past continuous
I'd have been centering you'd have been centering he'd have been centering we'd have been centering you'd have been centering they'd have been centering