The two versions of the phrasing and counterpoints of melodies are from When She Loved Me ToyStory 2 Sarah McLachlan.
The first and second time, when this melody appears, it goes as:
The third time, when this melody appears, it goes as:
Questions:
The sheet music says the two parts are all in F major. But are they really the same F major, or are they different?
The first and second time,
the base goes: FEEDDCCB.
The third time, the base goes FEbEbDbDbCCB.
Are there good reasons/theories behind this?