How Can I Be Sure by The Young Rascals is in D at 172 beats per minute and runs 2:12 across 82 bars. It uses 15 chords — C, D, F, Em, Dm, Dm7, Dm6, Em7, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? How Can I Be Sure guitar melody tab.