Taivo A Taiwan Mandarin dictionary

一旦

yīdàn

ㄧ ㄉㄢˋ

  1. 1in case (sth happens)
  2. 2if
  3. 3once (sth happens, then...)
  4. 4when
  5. 5in a short time
  6. 6in one day
Example

一旦過了河, 你就安全了。

yídàn guò le hé nǐ jiù ānquán le

Once across the river, you are safe.

Keep 一旦 and it comes back until you know it.

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