Skip to content

一旦

yī dàn
HSK 2.0 Level 5 HSK 3.0 Level 5 Adverb Common

Sign in to save this word to your study lists.

Definitions

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

Word relationships

Related words

2 items
如果
rú guǒ

if

都表示假设条件，但'一旦'强调条件发生后紧接着的结果，语气更强烈。
当
dāng

(onom.) dong

'一旦'可用于表示某个时间点，与'当...的时候'类似，但更强调突然发生的变化。

Synonyms

1 item
万一
wàn yī

just in case

表示假设或条件，但'一旦'多用于某个事件发生后引发的结果，'万一'强调可能性很小的假设。

Usage notes

Common mistakes

'一旦' is often used with 就 to express 'once...then...', as in 一旦开始就不能停止。

Example Sentences

1 shown
一旦 下雨，比赛就会取消。
Once it rains, the match will be canceled.

AI-generated examples are marked with this icon.

Child Words of 一旦

一
yī

one

旦
dàn

(literary) dawn; daybreak