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Bob Marley 的《Bad Card》原曲为 C 调。 Originally recorded in the sounding key of C, 'Bad Card' by Bob Marley is best approached with a Capo placed on Fret 5, enabling guitarists to execute friendly G shapes while fully preserving the studio pitch. To prevent hand fatigue on the challenging F barre chord, beginners can comfortably substitute an open Fmaj7 (xx3210) or small four-string F (xx3211) without sacrificing harmonic richness or vocal support. The pivotal chord transition occurs between F and Em: anchor your index finger as a pivot guide and keep your fingertips close to the frets to prevent hesitation on the downbeat. Set your metronome at an initial practice tempo of 79 BPM in 4/4 time to master the '- ↑ - ↑ - ↑ - ↑' strumming groove, emphasizing steady downstrokes on beats one and three before accelerating toward the studio speed of 110 BPM.