'Tom Dooley' is a song that I often use as a first guitar lesson song as it is only two chords (of course I remember the Lonnie Donegan version) so here it is in 'G' for you. G and D7 are the first two chords I teach, then a student can go home after his/her first lesson and have a song to play, I also use 'He's Got The Whole World in His Hands' which is another two chord song. 
Tom Dooley
Misc. Traditional
G D7 G D7
G G
Hang down your head, Tom Dooley,
G D7
Hang down your head and cry,
D7 D7
Hang down your head, Tom Dooley,
D7 G
Poor boy, you're bound to die.
G G
I met her on the mountain,
G D7
There I took her life,
D7 D7
I met her on the mountain,
D7 G
And I stabbed her with my knife.
G G
Hang down your head, Tom Dooley,
G D7
Hang down your head and cry,
D7 D7
Hang down your head, Tom Dooley,
D7 G
Poor boy, you're bound to die.
G G
‘Bout this time tomorrow,
G D7
Reckon where I'll be,
D7 D7
Down in some lonesome valley
D7 G
Hangin' from a white-oak tree.
G G
Hang down your head, Tom Dooley,
G D7
Hang down your head and cry,
D7 D7
Hang down your head, Tom Dooley,
D7 G
Poor boy, you're bound to die.
G G
Hang down your head, Tom Dooley,
G D7
Hang down your head and cry,
D7 D7
Hang down your head, Tom Dooley,
D7 G G G…
Poor boy, you're bound to die.
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