the flat seventh!). Rhythmically, it places hard syncopations on the eighth note preceding both the first and third beat of the second measure, while its final three eighth notes provide momentum that effectively leads into the repeat. Musicologist Walter Everett highlights the riff as an example of the Beatles drawing inspiration from other artists and improving on the source material. He sees the "Day Tripper" riff as a combination of the ostinatos heard on Motown recordings such as the Temptations' "My Girl", Barrett Strong's "Money (That's What I Want)" and Marvin Gaye's "I'll Be Doggone", while also incorporating a rockabilly element that recalls Roy Orbison's "Oh, Pretty Woman". Musical structure The song is in 4/4 time throughout and the home key is E major. It opens with the riff played in unison on lead and rhythm guitar, followed by a staggered entrance of bass guitar, tambourine and finally drums. After this extended intro, the song's structure comprises two verses, a bridge that serves as an instrumental break, then a final verse, and the outro. The verse adheres to the twelve-bar blues form for eight bars, with a change to the IV chord followed by the expected return to I. The chorus portion of the verse then departs from the form by moving to the parallel major version of the home key's relative minor. As throughout the song, only major chords are used in this portion: F7 for four bars, and one bar each of A7, G7, C7 and B7. The bridge remains on the B chord for its entirety and takes the form of a "rave-up". The section begins with repetitions of the main riff and ends with a blues-inflected guitar solo accompanied by wordless harmony singing. A 12-note rising guitar scale sounds on the second beat of each bar, starting with a mid-range B note and climbing over an octave to F. In Everett's view, the intensity of the bridge – the bass pedal, rising scale, guitar solos, cymbal playing, and increased attack on the vocalised "aah"s – conveys the realisation that the singer is being used by the female day-tripper and "express a gradually-arising, yet sudden sensation of, enlightenment". Vocal line and lyrics "Day Tripper" follows a strand of Lennon's writing style in which the lyrics put down a woman who claims to be more than what she delivers, a theme commonly found in rhythm and blues and