eu não tinha certeza se

I wasn't sure if

→ eu
phrase Rare #38,061
I wasn't sure if Used to express uncertainty about whether something was true or would happen. Literally, it means “I didn't have certainty if.”
PO: Eu não tinha certeza se ele viria hoje.
EN: I wasn't sure if he would come today.

Eu não tinha certeza se voltaria a te ver de novo.

I wasn't sure if I would ever see you again.

Eu não tinha certeza se era realmente ela.

I wasn't sure if it was really her.

— Parasita (2019)

Eu não tinha certeza se eu podia confiar em você.

I wasn’t sure if I could trust you.

Eu não tinha certeza se poderia confiar em você.

I wasn't sure if I could trust you.

Eu não tinha certeza se chegaria a tempo.

I wasn't sure I'd get there in time.

— Barfi! (2012)