Japanese with Manga

While I didn't see you with 〜うちに

Manga panel from よつばと! showing example of While I didn't see you with 〜うちに.
よつばと! » Volume 1 » Page 11

Jumbo arrives to help Yotsuba and her father move into their new home.

よつば:
しばらく見ないうちにまた大きくなった!」
“You've grown bigger since I last saw you!”
Literal: “During the time I didn't see you, you've gotten bigger!”
ジャンボ:
「お?どこでおぼえたそのセリフ」
“Oh? Where'd you pick up that line?”

Key Points

1しばらく見ないうちに means during the time I didn’t see you
  • The phrase marks the unseen interval as the time when Jumbo supposedly grew.
  • It does not mean Yotsuba watched him grow.
2また大きくなった is a stock grown-up remark
  • また means “again”, as if this has happened before.
3Jumbo notices the phrasing
  • 「どこでおぼえたそのセリフ」 asks where she learned that line.
  • セリフ treats her comment like a borrowed scripted phrase.
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