〜とたん
Formation
N3
Meaning
Immediately upon doing ~ / At the same time as ~. It expresses that something unexpected happened right after an action was completed.
Examples
窓を開けたとたん、冷たい風が入ってきた。
The moment I opened the window, a cold breeze came in.
お酒を飲んだとたん、顔が赤くなった。
Immediately after drinking alcohol, his face turned red.
家に帰ったとたん、雨が降り出した。
The moment I returned home, it started to rain.
立ち上がったとたん、目眩がした。
The moment I stood up, I felt dizzy.