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11 thg 3, 2012 · 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. He is to sell this stuff. As you can see this is kind of a future tense, also implies that you have to do it and sounds pretty 'heroic' or literary.
9 thg 5, 2012 · The grammar book probably means that we don't say 'Do I must do this?' It cannot be used in interrogative sentences which use an auxiliary verb to form the question, as in my example. Must is a strange verb and needs more explanation than many irregular verbs. That is probably why your book tries to explain some situations where it cannot be used.
16 thg 11, 2014 · When talking about internal obligation, we can use either 'must' or 'have to'. Must is more formal. But when talking about external obligation, we only use 'have to' and not 'must'. That's the solid rule concerning this part according to Cambridge English Grammar in Use for Intermediate Learners of English.
10 thg 5, 2017 · Must is a modal verb, and all modal verbs are followed by a bare infinitive: he must have, he could have, he might have, he would have, etc. Like all modal verbs, must expresses either 'obligation' or 'possibility.' He must have left at 5 pm signals 'possibility.' Modal verbs have their own peculiarities, and 'must' can't refer to the past.
19 thg 6, 2016 · One of the uses of 'would' has been listed below: You use 'would', or 'would have' with a past participle, to indicate that you are assuming or guessing that something is true, because you have good reasons for thinking it. ⇒ You wouldn't know him. ⇒ …
5 thg 10, 2015 · Hello. I'm wondering if this sentence sounds natural or if you would say it differently: 'You must be really bored, mustn't you?' (said to someone who is continuously trying to annoy you just for the fun of it) I don't really like the tag …
31 thg 1, 2017 · Must I do it? 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 else has imposed the decision.' If so, since you don't need to ask if you yourself have decided to do something, 'Must I do it?' must be an odd question. Is that correct?
9 thg 11, 2011 · What is the difference between these two? You should have received a confirmation email and You must have received a confirmation email.
5 thg 5, 2013 · 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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