on one's best behavior
(быть) чрезвычайно вежливым
Пример использования идиомы on one's best behavior:
I told my son to be on his best behavior when we went to visit my friend.
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Другие идиомы:
- off the top of one's head
- one's days are numbered
- on one's own time
- one's bark is worse than one's bite
- ten to one
- on the edge of one's seat
- one-upmanship
- on one's heels
- as busy as a one-armed paperhanger
- out of one's shell
- one's frame of mind
- one's stamping grounds
- on one's guard
- off to one side
- off one's back