Girl by The Beatles

In this song, the singer's voice is a lot more varied than the background melody. The melody is composed of the same repeating pattern of chords which makes the voice more dynamic in comparison and consequently more interesting. This has the effect of making the melody the background and the voice the foreground.

I think that both the singer and the guitar follow a very continuous pattern, and you are correct in stating that many parts of the song seem abrupt. I believe that the most abrupt part is the monotonous "doo-doo-doo" from both the guitar and the vocals; it creates a sort of sense of unease, but it brings you back in with the comfortable continuity of the vocals.

Hey we found a four chord song. But yeah the background comping was pretty repetitive during the chorus. The vocal line was very melodic and soothing, keeping a consistent style while varying it enough to keep it fresh. I think its interesting that at the 1 minute mark the background vocals went into staccato "doos" that in my opinion didn't really fit with the style of the piece, so I'm curious as to why they would take that approach.