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convert to [religion]
convert to 表示‘改信’；宗教名词前不加冠词。
He converted to Catholicism in his twenties.
他二十多岁时改信了天主教。
天主教信仰
先理解核心含义，再看它在真实句子里的用法。
天主教信仰
the beliefs and practices of a Catholic Church
He converted to Catholicism in his twenties.
他二十多岁时改信了天主教。
天主教会的信仰、实践和教义,通常指罗马天主教会。
The faiths, practices and doctrines of the Catholic Church, usually the Roman Catholic Church.
普遍性或广泛性的状态或性质；包容性。
The state or quality of being catholic or universal; catholicity.
天主教的信仰与实践
the beliefs and practices of a Catholic Church
情怀的开明；视野的广阔。
Liberality of sentiment; breadth of view.
Many of his paintings were inspired by Catholicism and its traditions.
他的许多画作灵感来自天主教及其传统。
She decided to learn more about Catholicism before visiting Rome.
她决定在去罗马之前多了解一些天主教。
The history of Catholicism in this region goes back several centuries.
天主教在这个地区的历史可以追溯到几个世纪前。
convert to 表示‘改信’；宗教名词前不加冠词。
He converted to Catholicism in his twenties.
他二十多岁时改信了天主教。
用‘the + 抽象名词 + of’来指称宗教的某一方面，如 history, teachings, influence。
This book examines the history of Catholicism in Latin America.
这本书考察了天主教在拉丁美洲的历史。
Catholicism 作主语时视为单数，谓语常用 is。
Catholicism is the world's largest Christian denomination by number of members.
按成员人数计算，天主教是世界上最大的基督教教派。
practice 后直接接宗教名词，不加冠词，意为‘信奉、遵循’。
They practice Catholicism with great devotion.
他们非常虔诚地信奉天主教。
Not this
She believes in Catholic.
Use this
She believes in Catholicism.
表示“天主教信仰”这个抽象概念时，应用名词 Catholicism；Catholic 作名词时指“天主教徒”，不能用在 believe in 后表示信仰。
Not this
He is a Catholicism.
Use this
He is a Catholic.
Catholicism 是抽象名词，指天主教信仰，不能指人；表示“天主教徒”应用名词 Catholic。
Not this
They practice Catholic.
Use this
They practice Catholicism.
practice 后接表示宗教或信仰体系的名词作宾语；Catholic 是形容词（或指人），需改为抽象名词 Catholicism。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
皈依天主教
She converted to Catholicism after marrying an Italian.
她嫁给一位意大利人后皈依了天主教。
接受天主教信仰
The king embraced Catholicism to secure an alliance with Rome.
国王接受天主教信仰，以寻求与罗马结盟。
践行天主教信仰
They practice Catholicism by attending Mass every Sunday.
他们每个星期天参加弥撒，以此践行天主教信仰。
天主教的历史
The history of Catholicism spans nearly two thousand years.
天主教的历史跨越了近两千年。
天主教的传播
The spread of Catholicism across Latin America is well documented.
天主教在拉丁美洲的传播有据可查。
天主教和新教
The Reformation deepened the divide between Catholicism and Protestantism.
宗教改革加深了天主教和新教之间的分歧。
Use Catholicism naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 Catholicism 拆成 Catholic + ism：天主教（Catholic）的信仰体系就是 Catholicism，像‘主义’标签贴在教堂门上。
语域：neutral 常见场景：religious studies、news reporting、conversations about religion 该词为中性常用词，日常口语、书面语和学术语境都可用；比较常见于宗教或正式讨论中。
catholicisms
Dictionary facts from ECDICT, WIKTIONARY.