1
a firefighter
单数形式常与不定冠词 a 连用，表示“一名消防队员”。
He is a firefighter.
他是一名消防队员。
消防队员
firefighters — plural of firefighter
先理解核心含义，再看它在真实句子里的用法。
消防队员
a member of a fire department who tries to extinguish fires
He is a firefighter.
他是一名消防队员。
消防员,受过灭火训练的人。
A person who has been trained to put out fires.
The firefighter carried the child out of the burning building.
消防队员把那个孩子从着火的大楼里抱了出来。
My neighbor works as a firefighter and often works night shifts.
我的邻居是一名消防队员，经常上夜班。
The firefighters quickly put out the fire before it spread.
消防队员们迅速扑灭了大火，防止了火势蔓延。
单数形式常与不定冠词 a 连用，表示“一名消防队员”。
He is a firefighter.
他是一名消防队员。
复数形式 firefighters 表示多个消防队员。
Firefighters work hard to save people.
消防队员努力工作以救人。
可以用 who 引导定语从句来修饰 firefighter。
A firefighter who saves lives is respected.
拯救生命的消防队员受人尊敬。
Not this
She wants to be firefighter.
Use this
She wants to be a firefighter.
firefighter 是可数名词单数，在 be 后面作表语时前面需要加不定冠词 a/an，中文没有冠词，所以容易漏掉。
Not this
The firefighters is putting out the fire.
Use this
The firefighters are putting out the fire.
firefighters 是复数形式，谓语动词要用 are，不能用 is，主谓必须一致。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
志愿消防员
He has worked as a volunteer firefighter for ten years.
他做了十年志愿消防员。
职业消防员
Professional firefighters undergo rigorous training every year.
职业消防员每年都接受严格的训练。
新入职的消防员
The rookie firefighter was nervous during his first rescue.
这名新消防员在第一次救援时很紧张。
成为消防员
She decided to become a firefighter after the earthquake.
地震后她决定成为一名消防员。
休班的消防员
An off-duty firefighter helped save the family from the fire.
一名休班消防员帮助这家人从火中逃生。
消防员是唯一在所有人都在往外跑时冲进着火建筑物里的人。
My neighbor is a firefighter and says the job is more about saving people than fighting fires.
我的邻居是一名消防员，他说这份工作更重要的是救人，而不仅仅是灭火。
Use firefighters naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
fire（火）+ fighter（战士）：与火搏斗的战士，即消防员。
语域：neutral 常见场景：新闻报道、火灾现场、日常交谈 “firefighter”是标准常用词，语气中性，正式与非正式场合均适用，多用于新闻报道、官方文件及日常交流。
这些词都以 /-aɪtə(r)/ 结尾，与 firefighter 中的 -fighter 发音相同：fighter、lighter、tighter、brighter、writer、biter。带 -ighter 拼写时 gh 不发音。注意 fire /ˈfaɪə(r)/ 和 higher /ˈhaɪə(r)/ 彼此押韵，但不与 fighter 押韵，因为 fighter 有 /t/ 音；firefighter 的第一个音节是 /faɪə/，不是 fir /fɜː/。
Dictionary facts from ECDICT, WIKTIONARY.