keen adj.渴望；激烈的；热衷于；强烈的；热切的；热切；热心的；热情的；锋利的；喜爱；灵敏的；(对…)着迷，有兴趣；低廉的；思维敏捷的；寒冷刺骨的
vi.(为死者)恸哭，哀号
n.恸哭；(号哭着唱出的)挽歌
1.主要考点是其形容词用法。相当于enthusiastic
指因兴趣或欲望强烈而急于做某事或渴望某事发生的，通常后接介词 on 或动词不定式。
be keen on/about (doing sth
be keen to do
热心于，渴望/着迷于，对……有强烈兴趣的；热切热衷于
Tom's very keen on Anna.
汤姆迷上了安娜。
Mick has always been very keen on Carla.
米克一直迷恋卡拉。
Both companies were keen on a merger
两家公司都很想合并。
She is also keen on the ballet.
她也热衷于芭蕾舞。
I got quite keen on the idea.
我对这个想法燃起了极大的热情。
I wasn't too keen about her suggestion.
我对她的建议并不热衷。
I'm not keen on spicy food.
我不喜欢加有香料的食物。
I wasn't too keen on physics and chemistry.
我对物理和化学不是太感喜爱。
Many companies in Britain are keen on the idea of tax incentives for R& D.
英国许多公司都很欢迎以税收优惠的方式来鼓励研发的想法。
She's not keen on being told what to do.
她不喜欢别人向她发号施令。
I wasn't too keen on going to the party.
我不太想去参加这次聚会。
She was keen on going to the picnic.
她很想参加这次野餐。
I am dead keen on fishing.
我酷爱钓鱼。
You are really keen on playing chess.
你们下棋的瘾头可真不小。
I'm keen on providing signers for deaf people and readers for the blind.
我热心于为聋哑人提供手语员，为盲人提供朗读员。
You're not keen on going, are you?...
你不太想去，是吗？
John was very keen to help.
约翰很热心，愿意帮忙。
They were keen on going to Europe in the spring.
他们热切盼望春天去欧洲。
They are keen to get the negotiating process back on the rails.
他们热切希望使谈判重新步入正轨。
The receivers are keen to sell the stores as one lot.
破产事务官想要将这些店铺打包整体出售。
He is keen to point out the benefits which the family network can provide.
他很乐意指出家庭网络可以带来的好处。
Most managements are keen to avoid strikes.
大多数经营者都很希望避免罢工的发生。
Companies are increasingly keen to contract out peripheral activities like training.
公司越来越倾向于把像培训这样的非核心业务外包出去。
Americans are never too keen to leave their beloved country.
美国人从不急于离开他们热爱的国家。
They'll be keen to enhance their reputation abroad.
他们会非常渴望提高他们在国外的声誉。
She is keen to pass the exams.
她迫切想要通过考试。
Firms are now keen to hold on to the people they recruit.
各公司现在都急切地想要留住招聘来的员工。
Steve was keen to get all the dirt he could on her
史蒂夫一心想要搜罗关于她的一切丑闻。
2.be keen (that) 从句
My father was very keen that I should fulfill my potential.
我父亲热切地希望我能够发挥出自身的潜力。
We are keen that our school should get involved too.
我们盼着自己学校也参与其中。
I'm very keen that the European Union should be as open as possible to trade from Russia.
我热切地希望欧盟尽可能开放与俄罗斯的贸易。
They want their daughter to go to university, but they are also keen that she get a summer job.
他们想要女儿上大学，但也希望她能打一份暑期工。
3.keen做前置定语：
a keen sportsman
热心运动的人
one of the keenest supporters of the team
这个队最热情的支持者之一
He's been a keen supporter of the Labour Party all his life.
他一生都是工党的热情拥护者。
She was a keen amateur photographer.
她是业余摄影爱好者。
a keen mind/intellect
敏捷的思考 / 头脑
He took a keen interest in his grandson's education.
他对孙子的教育很感兴趣。（强烈的；浓厚的；深厚的）
He had retained a keen interest in the progress of the work.
他对那项工作的进展一直很关心。
Dogs have a keen sense of smell.
狗的嗅觉很灵敏。（灵敏的；敏锐的）
I can see you have a keen sense of humour.
我能看出你极具幽默感。
They described him as a man of keen intellect.
他们把他描述成一个才思敏捷的人。
My friend has a keen eye for (= is good at noticing) a bargain.
我的朋友最会发现便宜货。（灵敏的；敏锐的）
There is keen competition for places at the college.
要在这所学院就读竞争是非常激烈的。（激烈的；紧张的）
There is expected to be a keen fight in the local elections.
预计地方选举的竞争会非常激烈。
The company negotiates very keen prices with their suppliers.
该公司通过讨价还价从供货商那里拿到了很低的价格。（低廉的，有竞争力的）
动词
（为死者）恸哭，哀号
He tossed back his head and keened.
他仰天恸哭起来。