Have to is NOT an auxiliary verb (it uses the verb have as a main verb). We include have to here for convenience. Must is a modal auxiliary verb. In this lesson we look at have to, must and must not, followed by a quiz to check your understanding. have to for objective obligation. We often use have to to say that something is obligatory, for ...
In general, Have to is more frequent in conversation (or spoken English) than Must. Must is used more in formal writing, especially in written notices, rules or ...
Must vs. have to. Both Must and have to express obligation or necessity, but there are some small differences: • Must expresses the speaker's feelings, whereas have to expresses, above all, an impersonal idea: You must come. You are obliged to come (I require that you come) You have to come. You are obliged to come.
We use have to / must / should + infinitive to talk about obligation, things that are necessary to do, or to give advice about things that are a good idea ...
19.10.2018 · How to Use Must, Have to, and Need to in English. "Must," "have to," and "need to" in the positive or question form are used to speak about …
MUST: HAVE TO: The speaker thinks it is necessary, or it is the rule. The obligation comes from an external source. ♦ I must buy flowers for my mother. (It's her birthday and I decide to do that.): ♦ I have to buy flowers for my mother-in-law. (It is not my decision - …