Past perfect simple .
I had been waiting for my friend since seven o’clock when he finally arrived. - Il asteptam pe prietenul meu de la ora sapte, când în sfârsit a sosit.
He had been writing poems for two years when I met him. - Scria poezii de doi ani când l-am cunoscut.
I had been walking - Eu ma plimbam .
it had not been raining when you came. - Nu ploua cand ai venit.Had you been swiming before she left the piscine? - Inotai inainte sa plece ea de la piscina
Sper că am fost de ajutor !:)