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The present perfect tense of sang is have sung.
(Harmony is originally a musical term, describing the relationship between several different notes. It has become a general term to describe a positive relationship between several people, objects or ideas.)"John and David are very different but they try to work in harmony.""The barbershop quartet is a good example of vocal harmony."
they sang i like to teach the world to sing on the coca-cola commercial.
Paul McCartney; he had the strongest singing voice in the group, and the widest vocal range. Generally, this is true. But John sometimes sang the high harmony occasionally, and George sang the harmony on the last verse of "All My Loving".
Aly and AJ both sing the rush song. In most parts they sing in perfect harmony. A lyrics book can identify which sister sang which stanza solo.
World
Scritti Politti.
David Gilmour and Rick Wright both sang on Echoes, in harmony.
Deep Purple - "Perfect Strangers" LP
The Perfect Man.
Bone Thugs-N-Harmony
sang, not sung. "I sang a song" is correct, but "I sung a song" is not. You would say "I have sung a song", which is present perfect tense.