ついでに
ついでに
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tsuideniInformation, Report
Yuzuo Chan
|
28.06.2026
Meaning
While doing A, I also do B; taking the opportunity of A to do B as well ("while I'm at it").
Conjugation
(A)Vdict + ついでに + (B): (A)Vた + ついでに + (B)
Examples
Show translation
買い物に行くついでに、郵便局で手紙を出してきた。
スーパーに行くついでに、牛乳を買ってきてくれない?
部屋を掃除するついでに、トイレも掃除しておいた。
図書館へ本を返しに行ったついでに、新しい本も借りてきた。
散歩のついでに、パン屋でパンを買った。
友達の家に行くついでに、借りていたDVDを返すつもりです。
grammarDetailPage.commonMistakes.title
grammarDetailPage.commonMistakes.wrong: 音楽を聞くついでに勉強する。
grammarDetailPage.commonMistakes.correct: 音楽を聞きながら勉強する。
grammarDetailPage.commonMistakes.why: ついでに expresses taking the opportunity provided by one action to do something additional. ながら expresses two actions being performed simultaneously. If the meaning is 'study while listening to music', ながら is more appropriate because the two activities run at the same time and neither is an incidental extra.
grammarDetailPage.commonMistakes.wrong: 買い物に行くのついでに、郵便局に寄った。
grammarDetailPage.commonMistakes.correct: 買い物に行くついでに、郵便局に寄った。 / 買い物のついでに、郵便局に寄った。
grammarDetailPage.commonMistakes.why: After a verb, ついでに attaches directly with no の. Use の only after a noun.
grammarDetailPage.commonMistakes.wrong: 友達に会うついでに、買い物をした。 (when shopping was the real aim and meeting the friend was only a side matter)
grammarDetailPage.commonMistakes.correct: 買い物のついでに、友達に会った。
grammarDetailPage.commonMistakes.why: The clause before ついでに is the main occasion, and the clause after it is the minor extra. If shopping is the real aim, it must come first and the meeting should be the add-on.
Key points
A is the main action or activity, and B is an additional action done conveniently on the same occasion. Unlike ながら, ついでに does not mainly express two simultaneous actions. It stresses taking the opportunity to do something extra, so don't use it when B is the real purpose.
The speaker can do B themselves or ask someone else to do it (e.g. ~ついでに…てくれない?).
The related expression がてら can also mean 'while doing something', but it is mainly used with activities such as going out or taking a walk. It attaches to nouns or verb ます-stems (散歩がてら), so it cannot always replace ついでに.
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