Index finger (1): press flat across the A string to the high E string at the 4th fret, a barre.
Ring finger (3): 6th fret of the D string.
Little finger (4): 7th fret of the B string.
Don't play: low E string.
x46474 · A7sus4 shape
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Strumming patterns to try
↓↓↓↓Four downsSteady, for learning changes
↓↓↑↑↓↑Folk / popThe everyday pattern
↓↓↑↓↑BalladSlow songs, 3/4 or 6/8
↑↑↑↑Reggae skankOff-beat chops
About the C♯7sus4 chord
C sharp seventh suspended fourth is built from 4 notes: C♯ (1), F♯ (4), G♯ (5), B (♭7). The lowest note you play should be the root, C♯, highlighted on the diagram. Above you will find 12 shapes for it across the neck. Learn the first one, then use the others to keep your hand close to the next chord in the song.