VERBO AUXILIAR + VERBO PRINCIPAL
VERBO AUXILIAR = TO BE (past perfect)
VERBO PRINCIPAL = PRESENT PARTICIPLE
TO DRINK
I had been drinking
You had been drinking
He had been drinking
She had been drinking
It had been drinking
We had been drinking
You had been drinking
They had been drinking
USO DO PAST PERFECT CONTINUOUS
O "PAST PERFECT CONTINUOUS" descreve uma AÇÃO QUE COMEÇA ANTES DE ALGUM MOMENTO NO PASSADO E CONTINUA ATÉ AQUELE MOMENTO OU SE INTERROMPE POUCO ANTES DELE.
Ex.:
I got to school at 8:30.
The teacher started explaining the lesson at 8 o'clock.
When I got to school, the teacher had been explaining the lesson for half an hour.
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