Did you see that “p”? What does “senza sordino” mean? Did you see that accent? Some scores are full of performance instructions and others have no obvious markings. The details can include the obvious dynamic and expressive markings and also the much more subtle harmonic and melodic “markings”. Work to understand every word and symbol a composer uses and also look for the stuff “between the lines.” Every composer has a harmonic vocabulary which is unique to them. Harmony shows the ebb and flow of emotional tension. In order to understand the form and function of phrases you must start with the harmony; which chords contain the greatest emotional tension and where does that tension get released?