Alright well usually i'm not really big on Green Day but this 
is a fun song to play on bass.On the slide from 12 to 7 play each 
note about 3 times quickly.

Intro

G—————
D—12/7
A—————
E—————

Verse 1

G————————————————————9878
D————987———765————987————
A—77—————55————77————————
E————————————————————————

Chorus

G————————————————
D————————————————  x4
A—222—222—————777
E—————————555————

Verse 2

G————————8—6—4—2
D————7—7————————
A—77——7—7———————
E———————————————

repeat as nescessary.
alternate between each of these throughout the entrire song.