French language Q&A Forum

 I am reading "Le Petit Prince" and noticed that sometimes, passé composé is used in the description (NOT the dialogue)  instead of passé simple. In simple sentences like "J'ai ainsi vécu seul" and "J'ai vu un petit bonhomme tout à fait extraordinaire". 

There are instances where you can (or *have to*???) use passé composé in literature? I can't find any pattern so can someone explain this to me?  

I'm still a bit confused. To change the sentence "Il ne veut pas me parler" to passé composé, it would be "Il n'a pas voulu me parler." Right? But we had an example in class that was: "En classe, la prof vous parle (à toi et aux autres élèves)?" In our response, we were supposed to change it to negative passé composé. The answer our instructor gave was "Non, en class, la prof ne nous a pas parlée." I'm not understanding why it wouldn't follow the structure of the first example and be "Non, en class, la prof n'a pas nous parlée." Could you please shed some light on the differences in sentence structure between this response and the first example, and what the rules are? Thanks in advance.