basicallly the entire song is 3 basic chords

part 1
e|------------------------------------
b|------------------------------------
g|-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7
d|-7-7-7-7-7-7-6-6-6-6-6-6-5-5-5-5-5-5
a|-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5
e|------------------------------------

   ^ ^ v v ^^  2 down stroke 2upstroke then 2 downstroke should be the pattern

The first Part Leads right into this
meaning, slide right into this after part 1
Part 2
e|-/3-2-0
b|-/3-3-3
g|-/4-2-0
d|-------
a|-------
e|------- then after this go right back to part 1

for the pre chorus just play part 2, but dont slide