alright this is a pretty amazing song, and for me to learn how he played it i had to 
him and pay attention very carefully its pretty simple tho here it is.

Intro/chorus/outro

these are the four chords for the intro and chorus you can find the rythem of it 
by listening to it

HIGH-LOW

D|-1---1-----0----3-|
A|-1---1-----1----1-|
F|-2---2-----2----0-|
C|-3---0-----2----2-|
G|-0---0-----0----3-|
D|-1---1-----0----0-|
          i play that 1 on low e but you dont have to if you dont want to.

Verse

              if you listen you can here when he adds these two bottom notes.


D|--5/8----0/3----------|
A|--6------1------------|
F|--5------2------------|
C|--7------2------------|
G|--5------0------------|
D|--5------0------------|
            this five at the bottom im not sure if you cover or not but it sound ok


this does not mean slide / on this tab, it means add this note once in a while, listen 
the song for when


 Bridge:

How do you know(how do you know).......

D|-----10-12-10--------10-12-10-----|---10-8-------10-8--------------|
A|---10--------10---10---------10---|--8-----8----8-----8------------|
F|-10------------10--------------10-|-9--------9-9-------9-----------|
C|----------------------------------|--------------------------------|
G|----------------------------------|--------------------------------|
D|----------------------------------|--------------------------------|


thats basically the song if you dont understand how to play it look on my youtube profile


theguitar426 hope you enjoy playing the song bye