Verse 1 0:07-0:20
Verse 2 0:27-0:41
Middle 8 0:48-1:02
Verse 3 1:16-1:30
Comments: Just like "Little Child", "Thank You Girl" features a two-part introduction: first, a few harmonica notes on top of a guitar riff; then the drums enter along with the words "oh, oh". Both of these components reappear in the transition (this time with drums playing throughout), and then again in the coda (which extends through two additional repetitions of the second half of this passage - the "oh, oh" part). "Thank You Girl" is the first Beatles recording to use material otherwise independent in the intro, transition, and coda.
The other interesting thing about the structure of "Thank You Girl" is that the middle 8 is followed by the chorus. "Ask Me Why" is the only other Beatles recording as of April 11 1963 (when the single "From Me To You"/"Thank You Girl" was released) to do so. All other songs (except for "A Taste of Honey") that use a middle 8 follow it with a verse. "Honey" inserts a transition - based on the verse - right after the middle 8, which leads back to a verse. Also in "Honey", the second iteration of the middle 8 is followed by the coda, also based on the verse. So both middle 8s in "Honey" do lead to the next verse, it's just that they are delayed in doing so by a brief transition. Thus "Thank You Girl" and "Ask Me Why" are indeed the only two songs to follow the middle 8 with something other than a verse.