V + -(으)면 안 되다 – Must not / May not do V (Prohibition)

Conjugation & Pattern

• Verb stem without patchim OR ending in ㄹ + -면 안 돼요 (-면 안 됩니다)
• Verb stem with patchim (except ㄹ) + -으면 안 돼요 (-으면 안 됩니다)

Detailed Usage

Used to express rules, prohibitions, or social norms indicating that an action is not permitted.

Example Sentences

1. 1

   도서관에서 크게 이야기하면 안 돼요.

   Doseogwaneseo keuge iyagihamyeon an dwaeyo.

   You must not talk loudly in the library.

2. 2

   여기에 주차하면 안 됩니다.

   Yeogie juchahamyeon an doemnida.

   You may not park here.

3. 3

   실내에서 담배를 피우면 안 돼요.

   Sillaeeseo dambaereul piumyeon an dwaeyo.

   You must not smoke indoors.