o que você fazia

what you were doing

→ o
phrase Rare #31,426
what you were doing Often refers to an action in the past; can also mean "what you used to do" depending on context.
PO: Não entendi o que você fazia no computador ontem à noite.
EN: I didn't understand what you were doing on the computer last night.

E o que você fazia?

And what did you do?

— Roma (2018)

O que você fazia ?

What were you doing there?

— Arca Russa (2002)

Vamos falar sobre o que você fazia na Austrália.

Let's talk about what you used to do in Australia.

O que você fazia?

What were you doing?

— Um Tiro na Noite (1981)

Sempre achei certo o que você fazia, e chega.

I always thought what you were doing was right, and that's enough.

— Cinema Paradiso (1988)

Então o que você fazia no terraço uma hora dessas?

So what were you doing on the terrace at this hour?

— Hum Dil De Chuke Sanam (1999)

O que você fazia antes?

What did you do before?

— Amores Expressos (1994)