～際に JLPT N2 Neutral
〜sai ni
Means 'when', 'while', or 'on the occasion of' a certain event or situation.
Neutral, the everyday marker for an occasion or event - "on the occasion of/when".
Formation
Verb-casual + 際に, い-Adjective + 際に, な-Adjective + な際に, Noun + の際に
Explanation
～際に is used to specify a time or occasion when something happens. It’s more formal than a simple 'とき' and often appears in announcements or polite instructions.
Example sentences
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When departing, please don't forget your passport.
Shuppatsu no sai ni, pasupooto wo wasurenai de kudasai.
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When an earthquake occurs, please evacuate immediately.
Jishin ga okoru sai ni, sugu ni hinan shite kudasai.
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When I come to Japan, I plan to buy lots of souvenirs.
Nihon e kuru sai ni, omiyage wo takusan kau tsumori desu.
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Please wear a suit when attending the interview.
Mensetsu no sai ni, suutsu wo chakuyou shite kudasai.