I've been uderstate sthing you've been uderstate sthing he's been uderstate sthing we've been uderstate sthing you've been uderstate sthing they've been uderstate sthing
I'd been uderstate sthing you'd been uderstate sthing he'd been uderstate sthing we'd been uderstate sthing you'd been uderstate sthing they'd been uderstate sthing
I'll be uderstate sthing you'll be uderstate sthing he'll be uderstate sthing we'll be uderstate sthing you'll be uderstate sthing they'll be uderstate sthing
Futur antérieur
I'll have uderstate sthed you'll have uderstate sthed he'll have uderstate sthed we'll have uderstate sthed you'll have uderstate sthed they'll have uderstate sthed
Futur antérieur continu
I'll have been uderstate sthing you'll have been uderstate sthing he'll have been uderstate sthing we'll have been uderstate sthing you'll have been uderstate sthing they'll have been uderstate sthing
I'd be uderstate sthing you'd be uderstate sthing he'd be uderstate sthing we'd be uderstate sthing you'd be uderstate sthing they'd be uderstate sthing
Passé
I'd have uderstate sthed you'd have uderstate sthed he'd have uderstate sthed we'd have uderstate sthed you'd have uderstate sthed they'd have uderstate sthed
Passé continu
I'd have been uderstate sthing you'd have been uderstate sthing he'd have been uderstate sthing we'd have been uderstate sthing you'd have been uderstate sthing they'd have been uderstate sthing