1
informer for [organization]
for 后接为之提供信息的机构或组织。
She was an informer for the FBI.
她是联邦调查局的线人。
告密者；线人
informers — plural of informer
先理解核心含义，再看它在真实句子里的用法。
告密者；线人
a person who reveals confidential information in return for money
She was an informer for the FBI.
她是联邦调查局的线人。
告知者,通知者
One who informs someone else about something.
为金钱泄露机密信息的人
one who reveals confidential information in return for money
告发者,告密者
A person who tells authorities about improper or illegal activity.
告知者、激励者或启发者。
One who informs, animates, or inspires.
The informer told the detective where the stolen paintings were hidden.
线人告诉侦探被盗画作藏在哪里。
She became an informer because she needed the money to pay her debts.
她成为线人是因为需要钱还债。
The police promised to protect the informer after the trial.
警方承诺在审判后保护这名线人。
for 后接为之提供信息的机构或组织。
She was an informer for the FBI.
她是联邦调查局的线人。
on 后接被告发的对象。
The gang suspected that one of them was an informer on the others.
帮派怀疑他们中有人是告发其他成员的线人。
turn informer 为固定搭配，informer 前不加冠词。
Rather than go to prison, he turned informer.
他为了不去坐牢，选择了当线人。
Not this
He informer the police about the crime.
Use this
He informed the police about the crime.
informer 是名词，意为“告密者”，不能当动词用。表示“告知”的动词是 inform，应按时态使用 informed 等正确动词形式。
Not this
Can you give me some informer about the course?
Use this
Can you give me some information about the course?
informer 指“告密者”，是表示人的可数名词；表示“信息”的不可数名词是 information。两者都对应汉语“信息”时容易混淆，此处需要用 information。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
警方线人
The police informer helped them locate the stolen goods.
警方线人帮助他们找到了被盗物品。
转为线人
He turned informer after his arrest.
他被捕后转为线人。
有偿线人
The gang suspected she was a paid informer.
该团伙怀疑她是有偿线人。
匿名告密者
An anonymous informer warned the police about the bomb.
一名匿名告密者就炸弹一事向警方发出警告。
充当线人
She agreed to act as an informer for the investigation.
她同意为调查充当线人。
告密者，你知道我是老爸雪
From Snow's 1992 reggae-rap hit 'Informer', a worldwide pop culture phenomenon that popularized the word.
出自Snow 1992年的雷鬼说唱热单《Informer》，这首歌风靡全球，使这个词在流行文化中广为人知。
Use informers naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
inform（告知）后面加 -er，变成“告知的人”；记住：informer 告知的是秘密，为了钱——告密者。
语域：formal 常见场景：police investigations、court proceedings、news reporting 多用于正式场合，如法律、警务或新闻报道中，指为钱或好处提供秘密信息的人；日常口语较少使用，口语中更常说 snitch、rat 等词。
这些词都以 /ɔrmɚ/ 结尾，与 informer 押韵：former, performer, transformer, reformer, dormer, warmer（warmer 拼作 -ar-，但发音相同）。注意形近但发音不同的词：informal /ɪnˈfɔrməl/ 和 inform /ɪnˈfɔrm/ 不以 /ɔrmɚ/ 结尾，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.