had better/best do sth Meaning in the Cambridge English Dictionary
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Meaning of “had better/best do sth” in the English Dictionary

"had better/best do sth" in British English

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had better/best do sth

If you had ​better/​best do something, you should do it or it would be good to do it: I'd ​betterleave a ​note so they'll ​know I'll be late.
(Definition of had better/best do sth from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “had better/best do sth”
in Chinese (Simplified) 应该, 最好…
in Chinese (Traditional) 應該, 最好…
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