Past Perfect Continuous

Para situações que estavam acontecendo antes de algo mais acontecer. Isto é, X estava acontecendo e Y interrompeu.

Nós usamos o Passado Contínuo Perfeito quando uma ação começou no passado e não se finalizou até outro período do passado. Expressões como “for two minutes” (por dois minutos), “for three weeks” (por três semanas) ou “for one hour” (por uma hora”) podem ser usadas com esse tempo verbal. Também podemos usá-lo para expressar a causa de algo no passado. 

É estruturalmente parecido com o PAST PERFECT, mas tem o CONTINUOUS (ING).

Estrutura:

Afirmativa: SUJEITO + HAD + BEEN + VERBO(ING) + WHEN (Opcional)
Negativa:  SUJEITO + HAD NOT + BEEN + VERBO(ING) + WHEN (Opcional)
Interrogativa: HAD + SUJEITO + BEEN + VERBO(ING)

Exemplos:

We had been walking on the beach for half an hour when It started to rain.
Had I been loving?
You hadn't been loving.
Had She/ He/ It been loving?
Had they been waiting for three hours when their parents finally arrived?
He had been working at his father’s company for ten years when they closed.
I had been talking for five hours with my sister before my mum arrived.
My best friend Samantha had been teaching at the university for two years before she left for Australia.
Rodrigo was really tired because he had been walking all day.
Chris failed the middle term because he had not been going class.