Bars 4-8 show the initial melody that’s played over Dsus2, and bars 9 and 10 progress to the IV (four) chord, G, followed by ...

The dominant seventh of a V chord can be shown by the symbol V7. For example, G7 is made by taking the major triad of G (G - B - D) and adding an F (G - B - D - F). A cadence is formed by two ...