The difference between “must” and “have to”. Do you know it? Both “must” and “have to” express obligation or necessity, but there are some small differences: 1) “must” can express the speaker's feelings, whereas “have to” expresses an impersonal idea: Ex: You must come. (I require that you come) You have to come (There is a rule requiring you to come) 2) “Have to” mainly expresses general obligations, while “must” is used for specific obligations: Ex: I have to brush my teeth twice a day I must tell you something Want to learn more? Book a lesson with me to learn more about modal verbs. Hope to see you soon!