1
vouch for sb/sth
作“为……担保/证明”解，常表示基于亲身了解或经验来保证某人或某事的品质或真实性。
I can vouch for her honesty.
我可以为她的诚实作担保。
担保；保证
先理解核心含义，再看它在真实句子里的用法。
担保；保证
give personal assurance; guarantee
I can vouch for her honesty.
我可以为她的诚实作担保。
请求(某人)为某事作证。
To call on (someone) to be a witness to something.
引用或依赖(权威、著作等)来支持自己的行为或观点。
To cite or rely on (an authority, a written work, etc.) in support of one's actions or opinions.
确认或保证(某事)的正确性或真实性；也指确认或保证(断言或陈述的真实性)。
To affirm or warrant the correctness or truth of (something); also, to affirm or warrant (the truth of an assertion or statement).
为(某人或某物)的性质或品质作证或证明。
To bear witness or testify to the nature or qualities (of someone or something).
vouch
Base
原形
vouches
3rd person
第三人称单数
vouching
-ing
现在分词
vouched
Past
过去式
vouched
Past participle
过去分词
I vouch for her honesty.
我为她的诚实担保。
He vouched for the accuracy of the report.
他为报告的准确性作了担保。
She has vouched for him many times.
她已经多次为他担保。
vouch 通常与 for 连用，表示“为……担保、作证”。
I can vouch for Maria's honesty because we have been colleagues for over a decade.
我可以为玛丽亚的诚实担保，因为我们做同事已有十多年了。
The professor vouched for the student's research skills when she applied for the lab position.
那位教授在该学生申请实验室职位时为她的研究能力作了担保。
A food blogger vouches for the freshness of the ingredients at this market every week.
一位美食博主每周都为这家市场的食材新鲜度作保。
作“为……担保/证明”解，常表示基于亲身了解或经验来保证某人或某事的品质或真实性。
I can vouch for her honesty.
我可以为她的诚实作担保。
较正式，后接 that 从句，表示确认或断言某事实为真。
I can vouch that the information is accurate.
我可以证明这条信息是准确的。
Not this
I have known him for years and can vouch his honesty.
Use this
I have known him for years and can vouch for his honesty.
汉语的“担保某人”把 vouch 当成及物动词，但英语 vouch 是不及物动词，必须用 vouch for somebody/something。补上介词 for 后，动作才作用于宾语。
Not this
Can you give a vouch for me when I apply for the job?
Use this
Can you vouch for me when I apply for the job?
汉语“担保”兼作名词和动词，但英语 vouch 只能作动词，不能用作名词。要表达“为我担保”应直接说 vouch for me，而不是 give a vouch for me。
Not this
He vouched that the machine is safe.
Use this
He vouched for the safety of the machine.
vouch 不能直接跟 that 从句作宾语；常见用法是 vouch for + 名词短语。把从句改写为名词短语（the safety of the machine）后，才符合 vouch 的搭配规则。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
为某人担保；为某人作保
I can vouch for her; she has always kept her promises.
我可以为她担保；她总是信守承诺。
保证某事的准确性；为某事的准确性作证
The auditor vouched for the accuracy of the financial statements.
审计员保证财务报表的准确性。
为某人的品行担保
Her former manager vouched for her character.
她以前的经理为她的品行担保。
为某物的质量担保
Many customers vouch for the quality of this brand.
许多顾客为这个品牌的质量作证。
无法为某事担保；不能保证某事
I cannot vouch for the truth of that rumor.
我无法保证那个传闻的真实性。
（法律）传唤（保证人）出庭作证
The buyer sought to vouch in the previous owner to defend the title.
买方试图传唤前所有人出庭为产权作证。
为……担保；替……作证
I can vouch for her honesty; she has never lied to me.
我可以为她的诚实作担保，她从未对我说过谎。
Use vouch naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 vow（誓言）：vouch 就是带着誓言替人担保、作证，v 像发誓的手势。
语域：mixed 常见场景：formal recommendation、legal/court setting vouch 最常以 vouch for 的形式出现，表示“为……担保/作证”，多用于正式推荐、证明某人可靠或担保某事；日常口语中不如 guarantee 或 swear 常用。在法律语境中，vouch 还可表示“传唤（某人）出庭作证”，属正式用法。整体语气偏正式，具体含义需看搭配。
与 vouch /vaʊtʃ/ 押韵的词：couch, pouch, slouch, crouch, grouch（都含 /aʊtʃ/）。注意 touch 拼写相似，但发音为 /tʌtʃ/，并不押韵。
Dictionary facts from ECDICT, WIKTIONARY.