CHORDS
E7th-x 7 9 9 0 0
D5th-x 5 7 7 0 0 
C3th-x 3 5 5 0 0 
B2th-x 2 4 4 0 0 

These chords are made up just to let ya know where to play what.  

INTRO:
E7 (2x)   C3 (2x)    D5 (2x)     B2 (2x)       
            Play twice. Let all Strings ring.

VERSES:
 E7 (2x)   D5 (2x)   C3 (4x)
             Play 4 times while muting the 5th and 6th strings.  
             "Rain rain on my....."

PRE-CHORUS:
Play 4 times. Same as VERSES. Let all strings ring.
              "But if I can't swim...."
        
CHORUS: 
Play 4 times. Same as INTRO. Let all strings ring. 
               "....When i'm falling..."

GUITAR INTERLUDE between verses: E7th (16x)