was necessary
Não sabia que isso era necessário.
I didn't know that was necessary.
Eles aceitaram o que era necessário para vencer.
They accepted what was necessary to win.
I did what was necessary.
Was that necessary?
That wasn't necessary.
That wasn't necessary.
Tom decidiu que não era necessário pagar aquela conta hoje.
Tom decided it wasn't necessary to pay that bill today.