under oath

IPA/ˌʌndəɹ ˈəʊθ/
IPA/ˌʌndɚɹ ˈoʊθ/

under oath — 慣用語

1. To be in a legally binding position where you have formally promised to tell the

1.慣用語B2
釋義

宣誓下

在法庭宣誓後須誠實作證

To be in a legally binding position where you have formally promised to tell the truth, especially when giving evidence in a court of law.

例句

The witness testified under oath that she saw the defendant leaving the building just before midnight.

證人在宣誓後作證，說她看到被告在午夜前離開那棟大樓。

collocation: testify under oath

Wei Chen was placed under oath by the court clerk before giving any testimony.

在發表任何證詞之前，Wei Chen 由法院書記官帶領完成宣誓。

collocation: place/put someone under oath

同義詞

文法句型

be under oath

place/put someone under oath

testify under oath

swear under oath

用法筆記

Only used in formal legal or official proceedings such as court hearings, depositions, or sworn affidavits. The phrase indicates that the speaker has made a legally binding promise — violating it by lying is the crime of perjury.

常見錯誤

❌I promise under oath to finish the project on time.
✅I promise to finish the project on time.
💡'Under oath' is only used in legal/official contexts where lying carries legal penalties, not for everyday promises.
❌He swore under oath to support his team.
✅He swore under oath to tell the truth during the trial.
💡'Under oath' refers specifically to the formal promise to tell the truth in a legal proceeding, not to any general pledge.