It is common to substitute the relative minor chord for the IV chord. This is a IIm chord. E.g. in the key of C the IV chord is F. The relative minor of F is Dm, which is the IIm chord.
Practice playing turnarounds No. 1 and No. 2 in various keys, using the above substitution.
Turnarounds can also be played using chord extensions of the base chords. These examples use major seventh and minor seventh chords.
If we substitute the relative minor (nm7) for the IVmaj7 chord,
If we substitute the relative minor (nm7) for the IVmaj chord,
It is possible to substitute the V7 chord with a ninth chord.
If we substitute the relative minor (nm7) for the IVmaj7 chord,
If we substitute the relative minor (nm7) for the IVmaj7 chord,
It is possible to substitute the V7 chord with a ninth chord.