I often find myself pausing before deciding whether I should be using 되다 or 돼다 in a sentence.

Is there a simple rule to know when I should be using which?

  • 돼 is the contraction of 되어.
    – Klmo
    Commented Mar 9, 2020 at 13:12
  • 8
    You never use 돼다. Commented Mar 9, 2020 at 14:02
  • 돼 is the contraction of 되어, right. One of the famous ways for natives to know when to use 되 and 돼 is that, you put 하 or 해 first, whichever sounds right, and replace it with 되 or 돼 respectively. Commented Mar 24, 2020 at 18:34

1 Answer 1


'-되' + '-어, -어라, 어서, 어야, -었-' = 되어, 되어라, 되어서, 되어야, 되었다 => 돼, 돼서, 돼야, 됐다

되다 (o) 돼다 (x)

'-되' is a stem so it cannot be used alone.

돼 (o) 되 (x)

되니 (o) 돼니 (x)

안돼 (o) 안되 (x)

  • Thanks for the examples!
    – vievievie
    Commented Mar 25, 2020 at 12:50

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