Intro doesn't have bass, but you'll notice when it starts.
 
do this for first verse
G-----------------
D-----------------
A----00----22(22)-
E-00----22--------
 
then this for chorus and rest of song 
G----------------------
D----------------------
A------0000------2-4-2-
E-0000------2222-------
 
then back to this
G-----------------
D-----------------
A----00----22(22)-
E-00----22--------
for the last verse
 
Then this for chorus
G----------------------
D----------------------
A------0000------2-4-2-
E-0000------2222-------