The song starts with a simple pattern of D and C chords, engaging you with a smooth rhythm. The strumming pattern here is simple: down, down-up, up-down-up. Repeat this pattern twice for each chord.
The verses are where the song starts to pick up. The chords used are D, G, and A. You should maintain the same strumming pattern from the intro. The main challenge here are the chord transitions. A good exercise would be to practice moving from D to G, and G to A.
The chorus is similar to the verses, but adds an additional A chord. The strumming pattern remains the same. Practice transitioning from D to A, as it will be used frequently.
The bridge introduces a Bm chord. This chord can be a bit tricky for beginners, so take some time to get comfortable with it. The strumming pattern changes a bit here: down-down, down-up, up-down-up. The transition from D to Bm can be challenging, so practice it a lot.
The third verse follows the same pattern and chords as the first two verses. Keep practicing those transitions and maintain the strumming pattern.
"Bad Case Of Loving You" by Robert Palmer is a great song for beginners to get comfortable with chord transitions and strumming patterns. Practice the chords and the transitions between them, and you'll have this song down in no time.