Another type of common chord is the dominant seventh chord. It is usually referred to as the seventh chord. The chord symbol for the seventh chord is the number 7 written after the alphabetical letter. The symbol for the G seventh chord is G7.
G7
To play the G7 chord, place the first, second and third fingers of your left hand as shown in the diagram. Strum all four strings.
This is a half note strum. It lasts for two beats. There are two half note strums in one bar of * time.
This example contains five bars of the G7 chord. Play two half note strums in each bar. The bold numbers tell you to strum the chord, the smaller numbers indicate to hold it until the next strum.