Grammar › N3 · 02 Time and sequence
〜ついでに: while at it; on the way
N3 · 02 Time and sequence
Says you do a second thing using the chance of doing the first.
Verb dictionary or past form, or noun + の + ついでに. The second action is a small extra that is convenient, not the main purpose. Often used when asking small favors.
Examples
駅へ行くついでに、この手紙を出してきて。
While you are going to the station, mail this letter for me.
買い物のついでに、図書館にも寄った。
While out shopping, I stopped by the library too.