1
a/an + impostor
不定冠词用于泛指。
He was exposed as an impostor.
他被揭露是一个冒名顶替者。
冒名顶替者
先理解核心含义，再看它在真实句子里的用法。
冒名顶替者
a person who pretends to be someone else in order to deceive others
He was exposed as an impostor.
他被揭露是一个冒名顶替者。
常指冒充他人身份以获取信任或利益的人
以假名或假身份行骗的人
Someone who attempts to deceive by using an assumed name or identity.
作出欺骗性伪装的人
a person who makes deceitful pretenses
融入三维场景、看似三维世界一部分的精灵或动画
A sprite or animation integrated into a three-dimensional scene to look like part of the 3D world.
以不寻常的语法人称被指称的术语
A term referenced in an unusual grammatical person.
The security guard quickly realized the man in a lab coat was an impostor.
保安很快意识到穿白大褂的男人是个冒名顶替者。
She was so convincing that no one suspected she was an impostor until her accent slipped.
她装得太像了，直到口音露馅，才有人怀疑她是冒名顶替者。
The impostors had stolen the identities of several real professors to attend the conference.
这些冒名顶替者盗用了几位真实教授的身份去参加会议。
不定冠词用于泛指。
He was exposed as an impostor.
他被揭露是一个冒名顶替者。
定冠词用于特指已知的冒名顶替者。
The impostor pretended to be a doctor.
那个冒名顶替者假装成医生。
表示在某个群体中存在的冒名顶替者。
There was an impostor among the guests.
客人中有一个冒名顶替者。
Not this
He is impostor.
Use this
He is an impostor.
impostor 是可数名词，前面需要加不定冠词 an。
Not this
He impostored as a doctor to get the job.
Use this
He posed as a doctor to get the job.
impostor 是名词，不能用作动词。动词应使用 pose as 或 pretend to be。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
冒充者综合征（总觉得自己不配成功）
Many successful people secretly struggle with impostor syndrome.
许多成功人士私下里都在与冒充者综合征作斗争。
觉得自己像个冒名顶替者（产生名不副实的感觉）
She felt like an impostor when she gave the keynote speech.
她发表主旨演讲时，觉得自己像个冒名顶替者。
揭露冒名顶替者
The journalist exposed the impostor with hard evidence.
记者用确凿证据揭露了那个冒名顶替者。
认出冒名顶替者
The guard spotted the impostor by his shoes.
保安凭鞋子认出了那个冒名顶替者。
冒充者综合征（指总觉得自己的成就不配得到、随时会被揭穿为骗子的心理现象）
Even after getting the job, she still struggles with impostor syndrome and worries that her coworkers will see through her.
即使得到了这份工作，她仍然受冒充者综合征困扰，担心同事会看穿她。
我们之中有1个冒名顶替者。
In the game Among Us, players try to figure out who the impostor is.
在《我们之中》游戏中，玩家们试图找出谁是冒名顶替者。
Use impostor naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：impostor 里的 post 是“职位”，or 是“人”，所以冒名顶替者就是顶替别人职位的人。
语域：neutral 常见场景：新闻报道、小说或影视评论、职场心理讨论 该词通常用于正式或中性书面语境，日常单独口语中不如 “fake” 自然；多出现在 “impostor syndrome”（冒充者综合征）等固定说法中。
可数名词，指冒名顶替的人
Dictionary facts from ECDICT, WIKTIONARY.