Modulating chord-progressions & improvisation:
Find the root and order of the chords in the exercise, playing rootnote, other chord tones
( third , fifth, etc ) or use a scale.
Focus on the bas, it’s often playing the root.
Play phrases that defines the chords and modulations in the exercise.
Use chord tones or scales.
Listen to the chords while you are improvising.
Modulation to 4th step
C instrument (demo)
Modulations:
Tonic 1. step
Incomplete dominant seven: 2. step
Dominant - in new key: 5. step
Tonic - in new key: 1. step
Incomplete dominant seven: 2. step
Dominant - in old key: 5. step
All chords are notated as tetrads, but can be extended ( 9th, 11th , etc )
All modulations are using the 2-5-1 cadence.
The modulation would look like this,
The first scale fits bar 1 & 4 - the lower scale fits the modulation in bar 2 & 3
English (UK) 
Dansk