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Questions tagged [have-to-vs.must]

Questions related to the (purported) differences between “have to do something” and “must do something”.

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1answer
245 views

must put vs. must have to put

I can’t access the database. You must have to put in a password. Why can’t one say “You must put in a password.”? Thank you.
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2answers
77 views

“has to” vs “must” in passive

I've been recently writing a technical document and I wrote something like It has to be possible to come back to the old version. (paraphrasing here, but I think sense is conveyed) However MS Word ...
3
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2answers
576 views

Deontic “must”, “have to” and “had to”

In English, to express strong obligation we can use either must or have (got) to. Grammars remind us that must is often used to express internal (personal) obligation, deduction (likelihood), and ...
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2answers
415 views

Must realise VS Must have realised

A question in an English exercise book puzzled me. The instruction is "Complete the second sentence so that it means the same as the first, using the word in bold. Use between two and five words." ...
2
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2answers
3k views

had to have been vs. has to have been vs. must have been

At 4:18 of this video titled "Trump's UN Speech Advocates For Both Peace And Nuclear War", Stephen Colbert said: Now, the most awkward moment had to have been when he brought up Venezuela. And ...
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2answers
2k views

must vs have to: British usage and academic rules

I am teaching 'have to' vs 'must' (British English usage) and, according to the book, the difference is as follows: must: it's necessary to do it (because the speaker says so) have to: it's ...
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1answer
2k views

“…mustn't have done..”: can it mean reproach for a past action or prohibition of a future action?

Can "You mustn't have done that" have a similar meaning to "You shouldn't have done that" / "You were not supposed to do it (but you did)"? (not logical probability but obligation) Since we have the ...
0
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1answer
1k views

can't have worked vs mustn't have worked [duplicate]

I'm trying to understand why answer is B? My answer is A I can't fine any rules how to explain it. She's got a terrible mark in the exam so she ....very hard at all. A. mustn't have worked B. can'...
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2answers
6k views

The use of “had to”

Does the following phrase mean it must be true? This fact had to be true. Or it must have been true? I would like a native speaker's opinion on this. I often hear it used in the second ...