I'd been altering you'd been altering he'd been altering we'd been altering you'd been altering they'd been altering
Futur
I'll alter you'll alter he'll alter we'll alter you'll alter they'll alter
Futur continu
I'll be altering you'll be altering he'll be altering we'll be altering you'll be altering they'll be altering
Futur antérieur
I'll have altered you'll have altered he'll have altered we'll have altered you'll have altered they'll have altered
Futur antérieur continu
I'll have been altering you'll have been altering he'll have been altering we'll have been altering you'll have been altering they'll have been altering
Conditionnel
Présent
I'd alter you'd alter he'd alter we'd alter you'd alter they'd alter
Présent continu
I'd be altering you'd be altering he'd be altering we'd be altering you'd be altering they'd be altering
Passé
I'd have altered you'd have altered he'd have altered we'd have altered you'd have altered they'd have altered
Passé continu
I'd have been altering you'd have been altering he'd have been altering we'd have been altering you'd have been altering they'd have been altering