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be a volunteer + (for/in/at) + noun phrase
be a volunteer 后常接介词 for、in 或 at 表示所属组织或地点。
She is a volunteer for the local animal shelter.
她是当地动物收容所的志愿者。
志愿者；自愿者
先理解核心含义，再看它在真实句子里的用法。
志愿者；自愿者
a person who acts of their own free will, especially to do unpaid work or help others
She is a volunteer for the local animal shelter.
她是当地动物收容所的志愿者。
自愿提供服务的人,尤指无偿服务者。
One who enters into, or offers themselves for, any service of their own free will, especially when done without pay.
志愿兵
(military) a person who freely enlists for service
自愿入伍者(服役期间与其他士兵一样受纪律和规章约束),与应征兵相对。
One who enters into military service voluntarily (but who, when in service, is subject to discipline and regulations like other soldiers), as opposed to a conscript.
志愿者
a person who performs voluntary work
The museum is looking for a volunteer to guide visitors on weekends.
博物馆正在寻找一名志愿者在周末为游客导览。
She has worked as a volunteer at the animal shelter for two years.
她在动物收容所做志愿者已经两年了。
Many volunteers helped clean up the beach after the storm.
许多志愿者在暴风雨后帮助清理海滩。
be a volunteer 后常接介词 for、in 或 at 表示所属组织或地点。
She is a volunteer for the local animal shelter.
她是当地动物收容所的志愿者。
不定式修饰 volunteer 表示志愿从事的具体任务。
We need a volunteer to lead the group.
我们需要一名志愿者来带领小组。
as a volunteer 作状语表示以志愿者身份。
He worked as a volunteer during the summer.
他夏天做志愿者工作。
Not this
She is volunteer.
Use this
She is a volunteer.
英语中可数名词单数前需要冠词，volunteer 是可数名词，因此应加不定冠词 a。
Not this
There are many volunteer in the park.
Use this
There are many volunteers in the park.
volunteer 是可数名词，复数形式需加 -s，与 many 搭配使用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
志愿工作
She does volunteer work at the local hospital every weekend.
她每个周末都在当地医院做志愿工作。
志愿项目
The university offers a volunteer program for students.
大学为学生提供了一个志愿项目。
志愿机会
There are many volunteer opportunities in the community.
社区里有很多志愿机会。
志愿服务
He received an award for his volunteer service.
他因志愿服务而获奖。
志愿者协调员
The volunteer coordinator organized the training sessions.
志愿者协调员组织了培训课程。
志愿者组织
She joined a volunteer organization to help the elderly.
她加入了一个志愿者组织来帮助老年人。
志愿者不是因为他们没有价值而得不到报酬，而是因为他们无价。
This quote is often used in volunteer appreciation events and charity campaigns.
这句话常用于志愿者表彰活动和慈善活动中。
我们是美国的志愿者
From the song 'Volunteers' by Jefferson Airplane, an anthem of the 1960s counterculture movement.
出自杰斐逊飞机乐队的歌曲《志愿者》，是20世纪60年代反文化运动的圣歌。
Use volunteer naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“vol”像“自愿”的“愿”声母，志愿者就是自愿服务的人。
register: 中性偏正式；典型语境：社区服务、慈善活动、组织招募；note_zh: 通常用于正式或半正式场合，如招募志愿者或描述志愿行为。
可数名词，复数形式为volunteers。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.