BILLIE JOE ARMSTRONG REMEMBERS ASKING HIS GUITAR TEACHER a question that would change his life. “I said, ‘How do you write a song?’” says the Green Day singer-guitarist, 47, at his studio in Oakland. “All he said was, ‘It’s verse, chorus, verse, chorus, bridge, verse, chorus — mix it up any way you want.’” Pretty soon, that was all Armstrong could think about. His three-chord anthems about growing up — with all the loneliness, anxiety, drug use, and masturbation that can come along the way — resonated with a generation on 1994’s diamond-certified Dookie and beyond. Whether he’s writing punk songs or a politically powered rock opera, Armstrong has the same rules: “It’s so important to try and be as honest as you possibly can with your audience,” he…
