ero convinta che

I was convinced that

→ essere
phrase Rare #38,078
I was convinced that Used by a female speaker; ero convinta is the imperfect tense of essere convinta. It is commonly followed by the subjunctive when expressing a belief or assumption.
IT: Ero convinta che avessi già mangiato.
EN: I was convinced that you had already eaten.

Ero convinta che non fossi capace!

I was convinced that I wasn't capable!

— Le vite degli altri (2006)

Io ero convinta che Tom fosse colpevole.

I was convinced that Tom was guilty.

Ero convinta che tu avessi una zoccola come quella di Peppe.

I was convinced that you had a slut like Peppe's.

— Perfetti sconosciuti (2016)

Ero convinta che fossi tu.

I was convinced it was you.

— Famiglia all'improvviso - Istruzioni non incluse (2016)

Ero convinta che non ti importasse di me.

I was convinced that you didn't care about me.

— Audition (2000)