What shadow speaking trains
Shadow speaking trains rhythm before ideas. You read short lines aloud, match the timing and let your mouth practise natural sentence movement.
Why it helps fluency
When your rhythm is steadier, you rush less and your pronunciation becomes easier to understand. That makes the later impromptu answer feel calmer.
A simple routine
Read five lines three times, then record a one-minute answer on a related topic. Read first, speak second, correct third.