concern 作名词是「担忧/关切」（express concern = 表达关切）；作动词有两个完全不同的用法：①使担忧（it concerns me that... = 让我担忧的是……）；②与……有关（this matter concerns everyone = 这件事与所有人有关）。固定表达：as far as sb. is concerned = 就某人而言；be concerned about = 担心某事；be concerned with = 与某事有关（不是担心）。
释义
1
n.担忧；关切
There is growing concern about the rising levels of air pollution in cities.
对城市空气污染加剧的担忧日益增加。
2
v.使担忧（concern sb.）
It concerns me that so many students struggle with mental health issues.
让我担忧的是，如此多的学生在心理健康方面面临困境。
3
v.与……有关（concern sb./sth.）
The new regulations concern all businesses operating in the area.
新法规涉及在该地区运营的所有企业。
语感
be concerned about = 担心；be concerned with = 与……有关（不担心）——介词决定含义
担忧（名/动）关切（名）与……有关（动）
两个介词搭配含义截然不同：concerned about = 担心（be concerned about safety = 担心安全）；concerned with = 与……有关（the report is concerned with climate change = 这份报告涉及气候变化）。固定表达：as far as sb. is concerned = 就某人而言（as far as I'm concerned = 就我而言，表达个人立场）；a matter of concern = 值得关注的问题。
陷阱
⚠️concerned about vs concerned with 的致命混淆
✗
The government is concerned with the rising unemployment rate.
政府担心失业率上升。
「政府担心失业率上升」用 concerned about；concerned with 表示「与……有关」，此处变成「政府的工作与失业率有关」，含义偏移
✓
The government is concerned about the rising unemployment rate.
政府担心失业率上升。
⚠️as far as ... is concerned 不能省略
✗
As far as I concern, this plan is risky.
就我而言，这个计划是有风险的。
固定表达是 as far as sb. is concerned（被动式），不能用主动式 concern
✓
As far as I am concerned, this plan is risky.
就我而言，这个计划是有风险的。
近义辨析
concernvsworry
concern担忧，较正式，常用于名词（a matter of concern）或书面语境worry担心，更口语，常用于日常表达
The survey revealed widespread concern about job security.
调查显示，人们对工作保障普遍感到担忧。
She worried constantly about her exam results.
她不断担心自己的考试成绩。
写作加分
✨ 加分词
替换：worry aboutbe worried about
议论文社会问题正式建议信分析现象的危害
普通
Many people are worried about the effects of social media on teenagers.
很多人担心社交媒体对青少年的影响。
加分 ✨
There is growing concern that excessive social media use is undermining teenagers' mental wellbeing.
人们日益担忧过度使用社交媒体正在损害青少年的心理健康。
为什么更好：there is growing concern that 比 many people are worried about 更书面，且 growing 表示「日益增长」，传达问题愈演愈烈的趋势感，适合议论文开篇
常用搭配
be concerned about担心……（介词 about）
be concerned with与……有关（介词 with）
as far as sb. is concerned就某人而言
express / raise concern表达/提出关切
a matter of concern值得关注的问题
词根
concern 里有 「con（共同）」——共同关注的事情，自然令人担忧
考考你
Q1对错判断
判断下面句子里 concern 的用法是否正确：
As far as the committee concerns, the proposal needs further review.
就委员会而言，该提案需要进一步审查。
✓ 正确版本
As far as the committee is concerned, the proposal needs further review.
就委员会而言，该提案需要进一步审查。
as far as sb. is concerned 是固定被动式表达，不能用主动式 concern；is concerned 不可省略或改为主动形式。
Q2义项辨析
下面哪个句子里 concerned 的含义和其他三个最不同？
A
Parents are concerned about their children's screen time.
父母担心孩子使用屏幕的时间。
B
The charity is concerned with providing clean water to rural areas.
该慈善机构致力于为农村地区提供清洁水源。
C
Doctors are concerned about the patient's slow recovery.
医生们担心病人康复缓慢。
D
She looked concerned when she heard the news.
听到消息后，她面露担忧之色。
A/C/D 中 concerned 均表示「担忧」；B 中 concerned with 表示「与……有关/致力于」，是完全不同的含义。
Q3翻译应用
用 concern 翻译下面句子（可参考 writing_upgrade 字段）：
人们对青少年心理健康问题的关切与日俱增，这促使政府出台了相关支持政策。
Growing concern about teenage mental health has prompted the government to introduce supportive policies.
关键搭配：Growing concern about
Growing concern about 是议论文开篇的高频书面表达，传递「问题日益严峻」的紧迫感；主语是「关切」而非「人」，句式更客观正式。