"Yesterday" is a baroque pop style song released by The Beatles. It was written, composed, and sung by Paul McCartney, produced by George Martin, and included in the studio album "Help" released by The Beatles on August 6, 1965. ! ".

On March 15, 1966, the song won six nominations including annual production and annual single at the 8th Grammy Awards. In 1984, the song was selected as an interlude in the movie "Once Upon a Time in America". In 1997, the song was selected into the Grammy Hall of Fame. In 1999, the American Broadcasting and Music Association calculated "the most broadcasted song on radio and television in the 20th century", which ranked third with more than 7 million broadcasts.

In 2000, the song ranked first in the "100 Greatest Pop Songs Since 1963" jointly selected by "Rolling Stone" magazine and MTV. In 2004, the song ranked 13th in the "500 Greatest Songs in History" by "Rolling Stone" magazine.

The melody of the song is inspired by Paul McCartney’s dream. One morning, Paul McCartney woke up with a lingering melody in his mind. He immediately went to the piano to play it and recorded it with a tape recorder. Paul McCartney thought the melody came from someone else’s work, so he spent a few weeks playing the melody to friends everywhere, asking them if they remembered the source of the melody. After inquiring with people in the music industry, McCartney determined that the melody was his own original, so he started to write lyrics and used "Scrambled Egg, Oh Baby, I Love Your Legs" as the informal lyrics.

It wasn't until May 1965 that the album "Help!" began recording in London, England, and McCartney earnestly added lyrics to the melody. After the first lyrics "yesterday" came out, he came up with the second sentence "all my troubles seemed so far away" for the rhyme; he also needed another three-syllable word, so there was "suddenly".

Producer George Martin proposed adding strings to the arrangement, but McCartney rejected it on the grounds that "we are a rock band". Later, George Martin suggested to record the string version first, if you don't like it, you can discard it. So McCartney adopted George Martin's suggestion and performed the accompaniment with a string quartet.