What does "must" mean in English? When do we use "must"? MUST is a modal auxiliary verb. In this lesson, you will learn the form of "MUST" (affirmative, negative full form and contracted and the question form.) You will also learn the many different uses and meanings: Obligation and necessity Deductions and conclusions Rules and laws Invitations and encouragement Criticism For each of these uses of "must", I give you a detailed explanation and several example sentences. IELTS online course with practice tests and ebook: http://bit.ly/2UrJNId Private English lessons & speaking practice: https://goo.gl/U1DSgF Other videos: BEEN vs GONE: https://www.youtube.com/watch?v=rbXkL1rlnJ0 Modal verb WOULD: https://www.youtube.com/watch?v=rN7e0nA14Tg Modal verb COULD: https://www.youtube.com/watch?v=fhR5pLeVzZk Modal verb SHOULD: https://www.youtube.com/watch?v=fAXistiCVK0 Listening exercises:    • English listening practice   Andrew, Crown Academy of English https://www.crownacademyenglish.com/ https://twitter.com/Crown_English null Photo credits by FreeDigitalPhotos.net : "Confused Teenage Girl" by Ambro “Educator Sitting With A Student And Taking Her Through A Lesson” by stockimages “Businessman Talking On Phone, Handling Clients” by stockimages “Mother Helping With Homework” by David Castillo Dominici “Man Yawning” by artur84 “Smiling Student Showing Thumb Up” by imagerymajestic “Sick Woman Covered With Blanket At Home” by marin “Is This The Time To Come To The Office?” by stockimages “Here Is Your Order Sir” Image courtesy of stockimages