Korean phrase
~하면 안 돼요. ~ ha myeon an twae yo
Meaning
It is not okay to ___
When to use it
This politely says that doing something is not acceptable. It is useful for stating a rule or gently warning someone.
Example dialogue
거짓말 하면 안 돼요. keo jin mal ha myeon an twae yo
It is not okay to lie.
알겠어요, 다시는 거짓말 안 할게요. al ge sseo yo ta si neun keo jin mal an hal kke yo
Okay, I will not lie again.