You have already learned how to tell or ask someone to do something for you, but how do you tell someone to “stop doing” something or “do not do” something?
Use the following verb + -(으)세요 [-(eu)-se-yo]:
말다 [mal-da] = to quit doing; to not do; to stop doing
When using -(으)세요 with this word, it becomes 마세요 [ma-se-yo]. When combining 마세요 with other verbs to say “do not do” or “stop doing” something, the suffix -지 [-ji] is needed after the verb stem.
Conjugation:
Verb stem + -지 마세요
Ex)가지 마세요. [ga-ji ma-se-yo.] = Do not go.
아직 가지 마세요. [a-jik ga-ji ma-se-yo.] = Do not go yet.
하지 마세요. [ha-ji ma-se-yo.] = Do not do it. / Drop it. / Stop it. / Forget about it.
사지 마세요. [sa-ji ma-se-yo.] = Do not buy it.
만지지 마세요. [man-ji-ji ma-se-yo.]= Do not touch it.
웃지 마세요. [ut-jji ma-se-yo.]= Do not laugh.
걱정하지 마세요. [geok-jjeong-ha-ji ma-se-yo.]= Do not worry.
경은 씨한테 말하지 마세요. [gyeong-eun ssi-han-te mal-ha-ji ma-se-yo.]= Please do not tell Kyeong-eun (about it).
아직 보내지 마세요. 아직 다 안 썼어요. [a-jik bo-nae-ji ma-se-yo. a-jik da an sseo-sseo-yo.]= Do not send it yet. I have not finished writing it.