Question

The past perfect tense is used to refer to actions that: could happen in the past. happened while another action was taking place. happened before some other action in the past. happened at one specific point in the past.

Answer 1

O past perfect é um tempo verbal usado para expressar ações passadas que aconteceram antes de outra ação que também ocorrera no passado. Então a alternativa correta seria a que diz happened before some other action in the past.