There are so many good examples. The most popular are: Bohemian Rhapsody by QueenHappiness is a Warm Gun by the Beatlesand a lot of stuff by the WhoBut some more modern bands that use this structure...
The most basic definition of musical form is how music is structured. But "Form" is a very... very broad subject, and in the study of Music Theory one of the hardest topics. Form separates the "men...