This interactive conversation session explores the differences between should, must, and have to in everyday English. Participants will learn how each modal verb expresses different levels of obligation, necessity, and advice. We will examine practical examples, compare formal and informal usage, and discuss how meaning changes depending on context. Through guided questions, and exercises, attendees will gain confidence in choosing the correct form in conversation. By the end of the session, learners will clearly understand when to use should for advice, must for strong obligation, and have to for external requirements.