Listen to the song for the timing.

intro
g--0000000000000000-----------------------------00000000000000-
d------------------22222222222222------------------------------
a--------------------------------444444444444444---------------
e--------------------------------------------------------------

Verse 
g-----------------------------------------------------------
d--0000000000002222222222222-------------222222222222-------
a---------------------------4444444444444-------------------
e-----------------------------------------------------------

Chorus
g-------------------------------------------------------
d-------------------------------------------------------
a-------------------------------------------------------
e---5555555555552222222222220000000000000000000000000---

The bass does not play during the bridge.