In Korean grammar, present tense verbs are used to describe actions that are happening now, will happen in the near future, or are general statements. The present tense in Korean can be formed by attaching the appropriate verb ending to the stem of the verb, depending on the level of politeness and speech style. There are four main verb endings for the present tense: -아/어요, -아/어, -ㄴ/는다, and -ㅂ니다/습니다. Understanding and applying these endings is crucial for mastering basic Korean grammar and communication.