tinha me esquecido

I had forgotten

→ ter
phrase Rare #30,257
I had forgotten The subject is often omitted in Portuguese. The phrase is commonly followed by de before the thing forgotten.
PO: Eu tinha me esquecido de ligar para ela.
EN: I had forgotten to call her.

Eu tinha me esquecido completamente disso.

I had completely forgotten about that.

Já tinha me esquecido dela.

I had already forgotten about her.

— A Liberdade é Azul (1993)

Eu tinha me esquecido o quanto gosto do Tom.

I had forgotten how much I like Tom.

Não estou acostumado com isso, tinha me esquecido como isso era bom.

I'm not used to this; I had forgotten how good it was.

— Os Falsários (2007)

Eu sei, tinha me esquecido.

I know, I’d forgotten.

— Guerra e Paz (1968)