I'd been altering you'd been altering he'd been altering we'd been altering you'd been altering they'd been altering
Futuro semplice
I'll alter you'll alter he'll alter we'll alter you'll alter they'll alter
Futuro continuo
I'll be altering you'll be altering he'll be altering we'll be altering you'll be altering they'll be altering
Futuro anteriore
I'll have altered you'll have altered he'll have altered we'll have altered you'll have altered they'll have altered
Futuro anteriore contínuo
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
Condizionale
Presente
I'd alter you'd alter he'd alter we'd alter you'd alter they'd alter
Presente continuo
I'd be altering you'd be altering he'd be altering we'd be altering you'd be altering they'd be altering
Passato
I'd have altered you'd have altered he'd have altered we'd have altered you'd have altered they'd have altered
Passato continuo
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