I have read the expression you better not try in several texts. Is it ok to switch you with one? I.e.,:

One better not try to do [...].

Here is an example of a full sentence:

United Airlines' website sometimes doesn't allow customers to cancel the ticket, but instead ask to call the customer service. This means one better not try to cancel after 23 hours and 59 minutes after the purchase of the flight ticket.

I couldn't find any use of "one better not try to" on Google.


1 Answer 1


In English, one has a formal quality, and it fits better with had better not X, or you'd better not X.

You better not X. is informal.

It's not a question of a rule, but style consistency might explain why no instances of one better not X were found.

  • Thanks! Just to make sure I understood correctly, I should instead write "one had better not try to cancel [...]" in the example given in the question? Mar 1, 2022 at 7:46
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    I think so, as a matter of style, not a hard rule. Mar 1, 2022 at 7:51
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    'You better' is very informal and colloquial; 'you'd better' is less colloquial, and 'you had better' is most formal and standard. Mar 1, 2022 at 10:25
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    Tsk. You had better not teach learners utterances that don't even include a proper active verb! Mar 1, 2022 at 17:03

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