was a mistake
Só dei aspirina para ele, foi um erro.
I only gave him aspirin, it was a mistake.
— Anatomia de uma Queda (2023)
This was a mistake.
That was a serious mistake.
Foi um erro ter terminado com você.
It was a mistake to break up with you.
Isso, obviamente, foi um erro.
That was obviously a mistake.
That was a mistake.
O que tom fez foi um erro.
What Tom did was a mistake.
Confiar no Tom foi um erro.
Trusting Tom was a mistake.