não tinha pensado nisso

hadn't thought of that

→ não
phrase Rare #35,682
hadn't thought of that Used to say that something had not previously occurred to you or been considered. In a question, it can mean “Hadn't you thought of that?”
PO: Eu não tinha pensado nisso antes de você mencionar.
EN: I hadn't thought of that before you mentioned it.

Não tinha pensado nisso.

I hadn't thought of that.

Como já falei, almirante, eu não tinha pensado nisso.

As I said, Admiral, I hadn't thought of that.

— Jornada nas Estrelas II: A Ira de Khan (1982)

Ainda não tinha pensado nisso.

I hadn't thought about that yet.

— A Lenda do Pianista do Mar (1998)

Eu não tinha pensado nisso.

I hadn't thought of that.

Não tinha pensado nisso?

Hadn't I thought of that?

— Cães de Aluguel (1992)