Spanish language Q&A Forum

In the example sentence. "Nos felicitaron porque habíamos aprobado todo con una nota alta," why is haber in the imperfect? I think of passing or failing something as something that happens in a moment -- you receive your grade and either it is pass or fail -- not as an ongoing state of being. Could one say "hubimos aprobado" or would that be wrong? 

A quiz question asks “vas a venir al cine mañana?”. In English it seems more common to say “are you going to go the movies tomorrow?” (or simply “are you going to the movies tomorrow?”) Any insights into this use of venir instead of ir?

I was wondering if there was a reply to his question below:

"didn't need to (infinitive) & needn't have (past participle) are used to express the lack of necessity in the past, ..."