fossi andato

had gone

→ essere
phrase Rare #38,254
had gone Used in the past subjunctive; the subject can be “I” or “you,” depending on context. With via or ne, it can mean “had left.”
IT: Pensavo fossi andato a casa.
EN: I thought you had gone home.

Credevo fossi andato via.

I thought you had left.

— L'attimo fuggente (1989)

Non pensavo fossi andato all'università.

I didn't think you'd gone to university.

Pensavo che fossi andato a riscuotere il conto.

I thought you had gone to collect the payment.

— A Taxi Driver (2017)

Pensavo che te ne fossi andato.

I thought you were gone.

— Akira (1988)

Se fossi andato a vedere Marla morire, questo non sarebbe successo.

If I had gone to see Marla die, this wouldn't have happened.

— Fight Club (1999)

Vorresti che me ne fossi andato.

You wish I was gone.

— Una di famiglia (2025)