I've been countersigning you've been countersigning he's been countersigning we've been countersigning you've been countersigning they've been countersigning
I'd been countersigning you'd been countersigning he'd been countersigning we'd been countersigning you'd been countersigning they'd been countersigning
I'll be countersigning you'll be countersigning he'll be countersigning we'll be countersigning you'll be countersigning they'll be countersigning
Futur antérieur
I'll have countersigned you'll have countersigned he'll have countersigned we'll have countersigned you'll have countersigned they'll have countersigned
Futur antérieur continu
I'll have been countersigning you'll have been countersigning he'll have been countersigning we'll have been countersigning you'll have been countersigning they'll have been countersigning
I'd be countersigning you'd be countersigning he'd be countersigning we'd be countersigning you'd be countersigning they'd be countersigning
Passé
I'd have countersigned you'd have countersigned he'd have countersigned we'd have countersigned you'd have countersigned they'd have countersigned
Passé continu
I'd have been countersigning you'd have been countersigning he'd have been countersigning we'd have been countersigning you'd have been countersigning they'd have been countersigning