Chinese phrase
一旦〜 yí dàn 〜
Meaning
once ___
When to use it
Shows that one event is followed by another. It often introduces a future condition and highlights what happens next.
Example dialogue
别忘了带伞，一旦下雨就会被淋湿。 bié wàng le dài sǎn yí dàn xià yǔ jiù huì bèi lín shī
Don't forget to bring an umbrella. Once it rains, you'll get soaked.
知道了，我现在去拿伞。 zhī dào le wǒ xiàn zài qù ná sǎn
Got it. I'll go get the umbrella now.