1.be\seem concerned for对……关心、关怀;对……感到担忧
We are concerned for \about her safety.
大家都关心她的安全。
A good employer should be concerned for the welfare of his workers.
好的雇主应当关心工人们的福利。
You are concerned for a wooden box.
原来你还在关心紫檀木盒子啊。《达·芬奇密码》
I've been concerned about you lately.
最近我对你有些担心。
We're naturally concerned for our daughter's safety.
我们担心女儿的安全，这很自然。
He didn't seem in the least concerned for her safety.
对她的安全他似乎一点都不担心。
The police are concerned for the safety of the 15-year-old boy who has been missing for 47 days.
那个15岁的男孩失踪47天了，警方对他的安全感到担忧。
They are concerned for the fate of the forest and the Indians who dwell in it
他们为这片森林及居住于其中的印第安人的命运而担心。
She called the police because she was concerned for his safety.
她担心他的安全，就打电话报了警。
2.be concerned with对……关心、关怀，注重，感兴趣;与……有关（有牵连），涉及到
We are chiefly concerned with improving educational standards.
我们主要关心的是提高教育水平。
He was concerned with the enhancement of the human condition.
他关心人类生存环境的改善。
I think I've been very selfish. I've been mainly concerned with myself.
我觉得我一直非常自私。总是只关心自己。
He is wholly concerned with his own grandeur.
他只关心自己的显赫地位。
While economists are free to theorise, company chairmen are concerned with actualities.
经济学家们可自由创建理论，公司总裁们则关心现实情况。
At the end of the day, the board's not going to be too concerned with three or four more dollars.
到头来，董事会不会太操心多花了几个钱。
They were more concerned with how the other women had dressed than in what the speaker was saying.
她们对别的妇女的衣着打扮比对发言人的讲话更加感兴趣。
Economists have been concerned with establishing proofs for their arguments.
经济学家一直致力于为他们的观点寻找证据。
The agency is more concerned with making arty ads than understanding its clients' businesses.
这家广告公司更注重如何制作附庸风雅的广告，而忽视了对客户业务的了解。
Much of his early work is concerned with the minutiae of rural life.
他早期的许多作品关注的是农村生活中一些鸡毛蒜皮的琐事。
His project is concerned with applying the technology to practical business problems.
他的项目是将这项技术应用于实际的商务问题。
Randolph's work was exclusively concerned with the effects of pollution on health.
伦道夫的著作专门论述污染对健康的影响。
The book is concerned with political economics.
这本书研究的是政治经济学。
The article was essentially concerned with her relationship with her parents.
本文主要是关于她与父母的关系。
Do not be over concerned with your weakness . Rather，focus on your strength.
不要关注自己的弱点，尽量把优势发挥出来，重强避弱！
It is possible with me：I am not concerned with the trivia of your life.
你与我相处，相互的理解是可能的：我可不关心你生活的琐事。
This report is concerned with Internet addition in teens.
这份报告是有关青少年网络成瘾。
3.be concerned about对……关心、关怀，感兴趣,注重；对……担忧
People looked out for one another and were concerned about the welfare of their fellows. 人们守望相助，关心着彼此的幸福。
They are concerned about my welfare.
他们关心我的福利。
Will Rogers once fondly said in the Depression that he was more concerned about the return of his money than the return on his money.
威尔·罗杰斯曾在大萧条时期深情地表示，他更关心的是他的资金能否收回，而不是他的资金能否产生回报。
Most American parents say they are not concerned about their children's grades as long as they work hard.
多数美国家长表示，只要孩子努力学习，就不会关心孩子的分数。
Americans are deeply concerned about the relentless rise in health care costs and health insurance premiums.
美国人非常关心无节制上涨的医疗费用和医保费用。
And isn't this the generation who say they've concerned about their health and the well-being of the planet?
这一代人不是说他们关心自己的健康和地球的福祉吗？
They were more concerned about the dogs' welfare than a clean getaway
他们更加关心那些狗的安危，而非自己如何干净利落地脱身。
Everybody is concerned about the future of his country.
每个人都关心自己国家的前途。
She is only concerned about her child.
她心里只惦着孩子。
Investors weren't concerned about short-term profits over the next few years
投资者对未来几年里的短期收益并不感兴趣。
She had never been greatly concerned about her appearance.
她从来不怎么注重外貌。
Speaking as a parent, I'm very concerned about standards in education.
作为家长，我十分关注教育的水准。
They are seriously concerned about security.
他们非常关注安全问题。
People are concerned about social inequality
人们很关注社会不平等问题。
Since the 1930s, cancer has always been ranked as the disease people are most concerned about.
自从20世纪30年代以来，癌症一直被列为人类最关注的疾病。
The committee is concerned about players' behaviour, especially arguing with referees
委员会很关注运动员的行为，特别是与裁判争吵的行为。
This aggression is the real issue the world should be concerned about. We want to keep that in focus
这次侵略才是世界应该关注的真正问题。我们想继续保持关注。
We are concerned about the child's welfare.
我们关注那个孩子的福祉。
She was concerned about the stratification of American society.
她很关注美国社会的阶层分化。
He's more concerned about the nuts and bolts of location work.
他更为担忧的是外景拍摄的具体内容。
We're concerned about your spiritual welfare.
我们担心你的心理健康。
The committee is concerned about the large number of prisoners sharing cells.
这个委员会对牢房拥挤问题表示担忧。
We are naturally concerned about the future.
我们自然对未来感到担心。
The President is deeply concerned about this issue.
总统对这个问题深感担忧。
在表示对……关心关怀时，这里的for、about、with是可以互换的。谈不上区别。
4.be concerned over对……担忧、忧虑、忧心忡忡
He was concerned over growing liberalism in the Church.
他对教会中日益增强的自由主义倾向心存忧虑。
Conservationists in Chile are concerned over the effect of commercial exploitation of forests
对森林的商业开发所带来的影响让智利的自然资源保护者们感到忧心忡忡。
Dealers grew concerned over the sliding dollar and receding prospects for economic recovery.
交易者对美元走软和经济复苏前景渐趋暗淡渐渐担忧起来。
The leader was much concerned over the plight of the refugees.
那位领导人对难民的悲惨境况很担忧。
补充知识点：
1. as/so far as sb/sth is concerned
as/so far as sb/sth goes就…而言
As far as I am concerned/ in my opinion, you can do what you like.
就我而言，你想干什么就可以干什么。
As far as I am concerned, it's time to share some secrets with you.
我想是时候和你分享一些秘密了。
2. a major publishing concern
一家大出版公司
a going concern
生意兴隆的企业；发展中的事业
He sold the cafe as a going concern .
他把经营得正红火的小餐馆卖掉了。
3.concerning可以作为介词，与……有关；关于，涉及到，比about正式。
He asked several questions concerning the future of the company.
他问了几个有关公司前途的问题。
All cases concerning children are dealt with in a special children's court.
所有涉及儿童的案件均由儿童特别法庭审理。
For more information concerning the club contact I. Coldwell.
咨询俱乐部详情，请与I.科德维尔联系。
The chairman's report is concerning the education of children.
主席的报告是关于儿童教育。
There are some more news concerning China.
这两天关于中国的新闻很多。
Worry concerning the future hangs on Jack’s mind.