keen adj.渴望；激烈的；熱衷于；強烈的；熱切的；熱切；熱心的；熱情的；鋒利的；喜愛；靈敏的；(對…)着迷，有興趣；低廉的；思維靈活的；寒冷刺骨的
vi.(為死者)恸哭，哀号
n.恸哭；(号哭着唱出的)挽歌
1.主要考點是其形容詞用法。相當于enthusiastic
指因興趣或欲望強烈而急于做某事或渴望某事發生的，通常後接介詞 on 或動詞不定式。
be keen on/about (doing sth
be keen to do
熱心于，渴望/着迷于，對……有強烈興趣的；熱切熱衷于
Tom's very keen on Anna.
湯姆迷上了安娜。
Mick has always been very keen on Carla.
米克一直迷戀卡拉。
Both companies were keen on a merger
兩家公司都很想合并。
She is also keen on the ballet.
她也熱衷于芭蕾舞。
I got quite keen on the idea.
我對這個想法燃起了極大的熱情。
I wasn't too keen about her suggestion.
我對她的建議并不熱衷。
I'm not keen on spicy food.
我不喜歡加有香料的食物。
I wasn't too keen on physics and chemistry.
我對實體和化學不是太感喜愛。
Many companies in Britain are keen on the idea of tax incentives for R& D.
英國許多公司都很歡迎以稅收優惠的方式來鼓勵研發的想法。
She's not keen on being told what to do.
她不喜歡别人向她發号施令。
I wasn't too keen on going to the party.
我不太想去參加這次聚會。
She was keen on going to the picnic.
她很想參加這次野餐。
I am dead keen on fishing.
我酷愛釣魚。
You are really keen on playing chess.
你們下棋的瘾頭可真不小。
I'm keen on providing signers for deaf people and readers for the blind.
我熱心于為聾啞人提供手語員，為盲人提供朗讀員。
You're not keen on going, are you?...
你不太想去，是嗎？
John was very keen to help.
約翰很熱心，願意幫忙。
They were keen on going to Europe in the spring.
他們熱切盼望春天去歐洲。
They are keen to get the negotiating process back on the rails.
他們熱切希望使談判重新步入正軌。
The receivers are keen to sell the stores as one lot.
破産事務官想要将這些店鋪打包整體出售。
He is keen to point out the benefits which the family network can provide.
他很樂意指出家庭網絡可以帶來的好處。
Most managements are keen to avoid strikes.
大多數經營者都很希望避免罷工的發生。
Companies are increasingly keen to contract out peripheral activities like training.
公司越來越傾向于把像教育訓練這樣的非核心業務外包出去。
Americans are never too keen to leave their beloved country.
美國人從不急于離開他們熱愛的國家。
They'll be keen to enhance their reputation abroad.
他們會非常渴望提高他們在國外的聲譽。
She is keen to pass the exams.
她迫切想要通過考試。
Firms are now keen to hold on to the people they recruit.
各公司現在都急切地想要留住招聘來的員工。
Steve was keen to get all the dirt he could on her
史蒂夫一心想要搜羅關于她的一切醜聞。
2.be keen (that) 從句
My father was very keen that I should fulfill my potential.
我父親熱切地希望我能夠發揮出自身的潛力。
We are keen that our school should get involved too.
我們盼着自己學校也參與其中。
I'm very keen that the European Union should be as open as possible to trade from Russia.
我熱切地希望歐盟盡可能開放與俄羅斯的貿易。
They want their daughter to go to university, but they are also keen that she get a summer job.
他們想要女兒上大學，但也希望她能打一份暑期工。
3.keen做前置定語：
a keen sportsman
熱心運動的人
one of the keenest supporters of the team
這個隊最熱情的支援者之一
He's been a keen supporter of the Labour Party all his life.
他一生都是工黨的熱情擁護者。
She was a keen amateur photographer.
她是業餘攝影愛好者。
a keen mind/intellect
靈活的思考 / 頭腦
He took a keen interest in his grandson's education.
他對孫子的教育很感興趣。（強烈的；濃厚的；深厚的）
He had retained a keen interest in the progress of the work.
他對那項工作的進展一直很關心。
Dogs have a keen sense of smell.
狗的嗅覺很靈敏。（靈敏的；敏銳的）
I can see you have a keen sense of humour.
我能看出你極具幽默感。
They described him as a man of keen intellect.
他們把他描述成一個才思靈活的人。
My friend has a keen eye for (= is good at noticing) a bargain.
我的朋友最會發現便宜貨。（靈敏的；敏銳的）
There is keen competition for places at the college.
要在這所學院就讀競争是非常激烈的。（激烈的；緊張的）
There is expected to be a keen fight in the local elections.
預計地方選舉的競争會非常激烈。
The company negotiates very keen prices with their suppliers.
該公司通過讨價還價從供貨商那裡拿到了很低的價格。（低廉的，有競争力的）
動詞
（為死者）恸哭，哀号
He tossed back his head and keened.
他仰天恸哭起來。