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一旦

yí dàn
HSK 2.0 Level 5 HSK 3.0 Level 5 Conjunction

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一旦
yí dàn Conjunction once; as soon as
一旦
yī dàn Adverb in case (sth happens); if

Definitions

  1. 1. once; as soon as

Grammar

Guides that feature 一旦

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1 guide
HSK 2.0 Level 5+ HSK 3.0 Level 5+ 7 min
Trigger Conditions with 一旦...就

Use 一旦...就 for policies, risks, and actions that start after a trigger.

Reading: yí dàn Open guide