I'll be regreting you'll be regreting he'll be regreting we'll be regreting you'll be regreting they'll be regreting
Future perfect
I'll have regreted you'll have regreted he'll have regreted we'll have regreted you'll have regreted they'll have regreted
Future perfect continuous
I'll have been regreting you'll have been regreting he'll have been regreting we'll have been regreting you'll have been regreting they'll have been regreting
I'd be regreting you'd be regreting he'd be regreting we'd be regreting you'd be regreting they'd be regreting
Past
I'd have regreted you'd have regreted he'd have regreted we'd have regreted you'd have regreted they'd have regreted
Past continuous
I'd have been regreting you'd have been regreting he'd have been regreting we'd have been regreting you'd have been regreting they'd have been regreting