What is the difference between these two? Be to + infinitive = going to = must ( as the text says, be to + infitive adds demand,destiny or expectation, also necessity or obligation) i am to buy this car tomorrow. With must as a noun, i find a must to try exceedingly unidiomatic, which is probably why that reading didn't even cross my mind and i suspected an ungrammatical to.
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A bbc site says that must suggests that it is the speaker who has decided that something is necessary, whereas have to and have got to suggest that somebody.
Like all modal verbs, must.
Meaning you should know this information. He must have, he could have, he might have, he would have, etc. How could i translate this sentence that must be it it´s said after giving some orders, so could it be así tiene que ser thanks Must is a modal verb, and all modal verbs are followed by a bare infinitive:
You should have received a confirmation email and you must have received a confirmation email. I know that mustn't have done is incorrect in british english.
