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must not vs must'nt

Both "must not" and "mustn't" are correct contractions of "must not." However, "must not" is more formal and commonly used in written and spoken English, while "mustn't" is more informal and often used in casual conversations.

Last updated: March 21, 2024 • 1150 views

must not

This is a correct and commonly used phrase in English.

Use "must not" to indicate prohibition or to give a strong recommendation. It is more formal and suitable for both written and spoken English.

Examples:

You must not enter this area.
She must not forget to bring her ID.
We must not underestimate the importance of this decision.

Show examples from the web [+]

Jul 17, 2022 ... All is well until I try to close the Additive Pipe task and get this "Path must not be a null shape" error. Google give no references on ...
Jan 31, 2022 ... The later two had both adjacent addresses assigned, which in the EOS shell was flagged by "error, networks must not be in the same subnet" .
Sep 11, 2021 ... name is invalid, must not end in space or period on Windows ... Even more I can easy create directory with trailing space on Windows. ... It can be ...
Jul 28, 2023 ... I must not be seen. The man circles the corner of the house. Is he looking for signs of life? Is he looking for a way in? Who is this man ...
Nov 7, 2023 ... The error that shows up when I try to add more fur using Density is: “Invalid UV Map: UV Islands must not overlap”. It's UV unwrapped and ...
Nov 26, 2019 ... Hi all, A user got a UI expression error today that reads "[...] has an invalid value for "totalCount". "totalCount" must not be null or ...
Dec 31, 2020 ... Renovate bot opened a PR to upgrade from 11.0.18 to 11.0.20 and my nextjs build failed with error Source and destination must not be the ...
Nov 25, 2020 ... I migrated to my new Pixel 5, and attempted to open the keepass database from gdrive and I get the following error of "the name must not be ...

Alternatives:

should not
cannot
may not
ought not
shall not

must'nt

This is a correct contraction of "must not" but is more informal and less commonly used in formal contexts.

Use "mustn't" in informal spoken English to indicate prohibition or strong recommendations. It is more casual and suitable for everyday conversations.

Examples:

You mustn't forget to call your mom.
He mustn't be late for the meeting.
We mustn't tell anyone about the surprise party.

Show examples from the web [+]

Nov 11, 2010 ... Must'nt Grumble.wmv. E Akibor. SubscribeSubscribedUnsubscribe 2828. Loading... Loading... Working... Add to ...
Feb 22, 2016 ... US must nt make us a fuss over Woody island facilities: China. Woody-Island- Flickr · China defends limited military facilities on disputed island.
My memories Ask Google. You searched for: must nt ( English - Tagalog ). [ Turn off colors ]. API call; Download a TMX; Contribute a TMX. Human contributions.
Mar 9, 2016 ... Talking about #genderequality we must nt overlook the fact that still in some areas women can't be part of democratic process and vote#Pk95.

Alternatives:

shouldn't
can't
mayn't
oughtn't
shan't

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