Spanish language Q&A Forum

It seems to me that in many cases we could substitute the imperfect with perfect. The main difference would be that in the former we talk about a repeated activity and in the latter about whether something ever took place or a few times at the most.

How is the future perfect used for probability in the past

I would like to ask how often is El Presente used to indicate future action in comparison to other future tenses?

Huir -> Huyendo

Seguir -> Siguiendo

Shouldn't it be Siguyendo?

Why is it "El cartero pasa todos los días a las tres de la tarde" instead of ""El cartero pasa todos los días a las tres por la tarde"? I thought we learned that it should be en, a, or por to express a specific time of the day? 

Could you please explain further why "cuál" is used instead of "qué" in these examples? 

The lesson is clear that "bueno" in front of a noun means "great," but simply "good" if after the noun.  So the instruction is that this girl simply wants a good man.  But the "correct" choice is "un buen hombre"!

How does this lesson fit with the other lesson "Using Querer in El Preterito Indefinido vs. El Preterito Imperfecto", which seems to be saying that querer in the Simple Past means "to try"?