Meaning/意味
just (now, at the moment), as soon as
How to make/作り方
Vた形 + とたん
This grammar is very similar to なり (nari), which uses the verb’s present tense instead.
example sentences/例文 (audio/音声付き)
ドアがあけたとたんにおならの匂いがした。
Doa wo aketa totan ni onara no nioi ga shita.
The moment I opened the door, I smelled smell of fart.
立ち上がったとたんに、目まいがした。
tachiagatta totan ni, memai ga shita
I became dizzy as soon as I stood up.
お酒を飲んだとたん、眠くなった。
osake o nonda totan, nemuku natta
I feel asleep the instant I start to drink alcohol.
Keep up with your studies!