se questo fosse

if this were

→ se
phrase Rare #21,146
if this were Used to introduce a hypothetical situation. Fosse is the imperfect subjunctive of essere (to be); in some examples, the related form se questo è means “if this is” for a real or possible situation.
IT: Se questo fosse vero, dovremmo cambiare i nostri piani.
EN: If this were true, we would have to change our plans.

Cosa faresti se questo fosse il tuo ultimo giorno?

What would you do if this were your last day?

Cosa farebbe se questo fosse il suo ultimo giorno?

What would you do if this were your last day?

Che cosa faresti se questo fosse il tuo ultimo giorno?

What would you do if this were your last day?

Come se questo fosse possibile.

As if that were possible.

— L'organo genocida (2017)