事先

shìxiān
adverb HSK 4 #3,803

Meanings

  1. 1 in advance
  2. 2 beforehand
  3. 3 prior

Examples

Nǐ yīnggāi shìxiān tōngzhī wǒ.
You should have notified me in advance.
Shìxiān zuòhǎo zhǔnbèi hěn zhòngyào.
It's important to prepare beforehand.
Wǒ shìxiān bù zhīdào zhè jiàn shì.
I didn't know about this in advance.

Tips

usage
事先 is more formal than 提前 (tíqián). Both mean 'in advance,' but 事先 emphasizes 'before the event' while 提前 emphasizes 'earlier than scheduled.'

Stroke Order

shì
xiān