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for the intro all you do is strum the D string than tap the 3rd fret and pull than strum the d string while holding the 7th fret and pull off to the 3rd than strum
Gon the 7th fret. It really isn't that hard once you get used to it but that is the way i have found to play this intro
(Intro/riff) (Repeat many times till the chorus) E:l --------------------| B:l --------------------| G:l -----------7--------| D:l --0h3p0-7p3---------| A:l --------------------| D:l --------------------| During the first chorus there is no guitar and after the first chorus you go back to the (above) and repeat till second chorus (Prechorus) (Let chords ring) E:l --------------------------| B:l --------------------------| G:l --10----------------10----| D:l ---x ----------------10---| A:l ---8-----------------8----| D:l --------------------------| (Chorus) E:l ---------------------------------------------------------------------------| B:l ---------------------------------------------------------------------------| G:l-----------------------------7--9--7--9-----9-----9--5---3---5---2---3---2--| D:l --3-0-3-5-3-8-5---8---3---2--x--x--x--x--8--x--8--x--x---x---x---x---x---x-| A:l --3-0-3-5-3-8-5---8---3---2--5--7--5--7--8--7--8--7--3---1---3---0---1---0-| D:l --3-0-3-5-3-8-5---8---3---2--------------8-----8---------------------------| (Bridge) E:l -------------------------------------| B:l -------------------------------------| G:l --0--2--3----3------------0---2------| D:l --------------------1---0------------| (x2) A:l -------------------------------------| D:l -------------------------------------| (Play bridge two times through) (Chorus) E:l --------------------------------------------------| B:l --------------------------------------------------| G:l --7--9--7--9-----9-----9--5---3---5---2---3---2---| (x2) D:l --x--x--x--x--8--x--8--x--x---x---x---x---x---x---| A:l --5--7--5--7--8--7--8--7--3---1---3---0---1---0---| D:l -----------------8------8-------------------------| (Play twice than end on a D chord) D:l--0 A:l--0 D:l--0