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be + a/an + [adjective] + collectivist
collectivist 作名词时可数，指主张集体主义的人；可用冠词和形容词修饰。
He is a committed collectivist.
他是一位坚定的集体主义者。
集体主义者
先理解核心含义，再看它在真实句子里的用法。
集体主义者
a person who belongs to the political left
He is a committed collectivist.
他是一位坚定的集体主义者。
集体主义的拥护者
An advocate of collectivism.
My uncle is a collectivist, so he often argues that public services should be expanded.
我叔叔是个集体主义者，所以他经常主张扩大公共服务。
The writer was known as a collectivist who supported community-owned farms.
这位作家以集体主义者著称，支持社区所有的农场。
Many early collectivists believed that factories should be managed by workers together.
许多早期集体主义者认为工厂应该由工人们共同管理。
collectivist 作名词时可数，指主张集体主义的人；可用冠词和形容词修饰。
He is a committed collectivist.
他是一位坚定的集体主义者。
作形容词时常作定语，修饰观点、制度等抽象名词。
They held collectivist views.
他们持有集体主义的观点。
作形容词表示性质时，也可放在 be 动词后作表语。
The system is collectivist.
这个制度是集体主义的。
Not this
We need collectivist efforts to solve the problem.
Use this
We need collective efforts to solve the problem.
collectivist 作名词指人，不能用来修饰 efforts 表示“共同的”；应使用形容词 collective（集体的，共同的）。
Not this
He is collectivist.
Use this
He is a collectivist.
collectivist 作名词时是可数名词单数，需要加不定冠词 a；中文没有冠词，因此容易漏掉。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
集体主义社会
In a collectivist society, people often prioritize group harmony over personal ambition.
在集体主义社会中，人们往往把群体和谐置于个人抱负之上。
集体主义价值观
The new generation tends to question traditional collectivist values.
新一代人倾向于质疑传统的集体主义价值观。
坚定的集体主义者
As a committed collectivist, she refused to accept the individual award.
作为坚定的集体主义者，她拒绝接受个人奖项。
集体主义意识形态
The party's collectivist ideology shaped its economic policies.
该党的集体主义意识形态塑造了其经济政策。
毕生的集体主义者
He remained a lifelong collectivist even after the political changes.
即使在政治变革之后，他依然是毕生的集体主义者。
Use collectivist naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
collect（收集）+ -ist（人）：把众人的想法收集起来的人，就是集体主义者。
语域：neutral 常见场景：political discussions、academic texts、news commentary collectivist 作名词时，多用于政治或社会理念的讨论，比较常见于书面语和正式场合，口语中较少见。该词可指集体主义的拥护者，也可能带有一定的评价色彩，使用时需根据上下文判断。
All six words end in the spelling -ist and the unstressed sound /ɪst/. Activist additionally shares the longer ending -tivist /tɪvɪst/ with collectivist. None of them rhymes with collectivist, whose stressed vowel is /e/ in -lect-; the stress falls on a different syllable in these words, so the stressed vowel and following sounds do not match.
Dictionary facts from ECDICT, WIKTIONARY.