Watch the F to G Chord Connection online guitar lesson by Brad Carlton from Guitar Lab: Vertical Soloing
Let's dig a little deeper into this IV V vamp in the key of C. The modes are F lydian for the IV chord (F) and G mixolydian for the V chord (G).I will show you these modes in V position. The scale form is form VI of the C major scale, There are two F notes and two G notes in this position. They establish the reference points for playing the F lydian and G mixolydian modes. You'll see me play the entire one octave mode against each chord, then I'll play smaller note groups. The important thing is that I'm always aware of the prevailing chord and I articulate the harmony by targeting roots, thirds and fifths as strong notes. That's why you want to be quite proficient with the arpeggios before you tackle the modes, otherwise your soloing will lose it's melodic nature and you'll sound like you're just playing a lot of meaningless notes.