Dear friends,
If G is "I", the "V" is D
If D is "I", A is the "V"
The exercise below is useful when you are playing a lick in G.
All the notes are from the G major scale.
From the G on the 3rd fret of the E string to the G on the 12th fret of the G string.
Try this out and play some variation.
Cheers