There is an exception, and that is the Locrian mode. This mode is a minor mode but it has two different notes from its parallel B minor: C (minor second) instead of C# and F (diminished fifth) instead of F#.
Most commonly seen in classical music, the “Verse-Refrain” is one of the simplest song structures. It consists of verses followed by a short refrain that sums the song’s message up quickly and easily (functioning somewhat like a chorus). The Beatles wrote many successful verse refrain songs throughout their career. Though the verse-refrain has almost completely disappeared from modern music, it is still an effective tool for certain songs. And as it is important to always keep in mind, history has a tendency to repeat itself!