1
be keenly aware of sth
常与 aware 搭配，表示“深切地、敏感地”。
She is keenly aware of the risks involved.
她敏锐地意识到其中涉及的风险。
敏锐地
先理解核心含义，再看它在真实句子里的用法。
敏锐地
in a keen and discriminating manner
She is keenly aware of the risks involved.
她敏锐地意识到其中涉及的风险。
敏锐地；深切地。
In a keen manner.
She watched the debate keenly, noting every detail.
她敏锐地观看辩论，注意到每个细节。
He is keenly aware of the risks involved in the project.
他敏锐地意识到项目中涉及的风险。
The team keenly feels the loss of their captain.
团队深切地感受到队长离去的失落。
常与 aware 搭配，表示“深切地、敏感地”。
She is keenly aware of the risks involved.
她敏锐地意识到其中涉及的风险。
常用于被动语态，强调影响或感受很强烈。
The loss was keenly felt by the whole community.
整个社区都深切地感受到了这一损失。
表示“极感兴趣”，比“很感兴趣”语气更强。
He is keenly interested in ancient Chinese poetry.
他对中国古代诗歌有浓厚的兴趣。
表示以敏锐的方式观察，对应“锐利地、敏捷地”的含义。
The detective keenly observed every detail at the scene.
侦探敏锐地观察到现场的每一个细节。
Not this
He is keen interested in the project.
Use this
He is keenly interested in the project.
interested 是形容词/分词，需要用副词 keenly 来修饰；keen 是形容词，不能修饰另一个形容词。
Not this
She has a keenly sense of humor.
Use this
She has a keen sense of humor.
修饰名词短语 sense of humor 要用形容词 keen；keenly 是副词，不能作定语修饰名词。
Not this
I am keenly to improve my English.
Use this
I am keen to improve my English.
be keen to do 是固定搭配，表示“渴望做某事”；keen 是形容词，作表语后接不定式。keenly 是副词，不能放在 be 后接不定式。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
敏锐地意识到；深切地知道
She was keenly aware of the dangers of the journey.
她敏锐地意识到旅途中的危险。
非常感兴趣的；热衷于
He is keenly interested in modern art.
他对现代艺术非常感兴趣。
深切感受到的；引起强烈感受的
The loss of the library was keenly felt by the town.
该镇深切地感受到了失去图书馆的痛苦。
热切期待的
The band's return is keenly anticipated by fans.
歌迷们热切期待着乐队的回归。
竞争激烈的
The election was a keenly contested race.
这场选举是一场竞争激烈的角逐。
极具竞争力的；竞争意识强的
The company operates in a keenly competitive market.
该公司在一个竞争激烈的市场运营。
敏锐地意识到
She was keenly aware of the risks involved.
她敏锐地意识到其中的风险。
竞争激烈的
The final match was keenly contested by both teams.
两支队伍在决赛中竞争激烈。
深切感受到的
The loss of the old library was keenly felt by the community.
社区深切感受到老图书馆的损失。
Use keenly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 keen（锐利的刀刃）+ ly：像刀刃一样锐利地看问题，做事敏捷又激烈。
语域：formal 常见场景：formal writing、academic prose、media commentary 作副词表示“敏锐地、深刻地”，多用于正式或书面语境，口语中较少见。比较常见于 keenly aware、keenly felt 等搭配。
同韵（/iːnli/）：keenly、queenly、cleanly、meanly、serenely。注意：thinly 拼写以 -nly 结尾，但元音是 /ɪ/，不押韵；finely 拼写相似，但读音是 /ˈfaɪnli/，也不押韵。
Dictionary facts from ECDICT, WIKTIONARY.