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on one's best behavior
01
とても礼儀正しい
as polite and well-mannered as one can be
What is the origin of the idiom "on one's best behavior" and when to use it?
The origin of the idiom "on one's best behavior" is not precisely documented, but it likely comes from the general idea of being well-mannered and polite in social situations. The word "behavior" refers to how one conducts themselves in social interactions. It is used to describe individuals who are making a conscious effort to exhibit good conduct and manners, usually to make a positive impression on others.
例
At the company's annual gala, all employees are expected to be on their best behavior and represent the organization professionally.
The 1,400 fans were on their best behavior and filed out peacefully at the end.
During the job interview, it's crucial to be on your best behavior to demonstrate your professionalism and suitability for the position.
When meeting her partner's parents for the first time, she was on her best behavior, trying to make a favorable impression.
The children were told to be on their best behavior while visiting the museum to show respect for the exhibits and other visitors.
