1
KO sb
KO 作及物动词，后接被击倒的人。
The boxer KOed his opponent in the second round.
这位拳击手在第二回合击倒了对手。
击倒；打倒
kos — plural of ko
先理解核心含义，再看它在真实句子里的用法。
击倒；打倒
a blow that makes an opponent unconscious
The boxer KOed his opponent in the second round.
这位拳击手在第二回合击倒了对手。
A local shape to which the ko rule applies; a ko shape.
ko fight
a stone in a ko in atari, a ko stone
The young boxer won the match with a stunning KO in the last round.
那位年轻拳击手在最后一回合以一记惊人的击倒赢得了比赛。
She has never suffered a KO in her professional career.
她在职业生涯中从未被击倒过。
A quick KO from a left hook surprised the crowd.
一记左勾拳的快速击倒让观众们吃了一惊。
KO 作及物动词，后接被击倒的人。
The boxer KOed his opponent in the second round.
这位拳击手在第二回合击倒了对手。
用 with 引出击倒对方的具体方式或工具。
She KOed the attacker with a single punch.
她一拳击倒了袭击者。
被动结构表示“被击倒”，也可写作 be KO'd 或 be KO'ed。
The champion was KOed in the final round.
冠军在最后一轮被击倒了。
KO 作名词，指击倒对方的一击（knockout）。
It was a KO.
那是一次击倒。
Not this
He was KO by the punch.
Use this
He was KOed by the punch.
ko 是动词原形，不能直接放在 be 动词后作过去分词；表示被动语态“被击倒”要用过去分词 KOed。
Not this
The boxer has 10 ko in his career.
Use this
The boxer has 10 kos in his career.
ko 作名词时可数，表示“击倒次数”时需要用复数形式 kos，不能只用单数 ko。
Not this
He KOed down his opponent in the second round.
Use this
He KOed his opponent in the second round.
ko 本身已包含“击倒/打倒”的意思，后面不要再加 down；这是受中文“击倒”中“倒”的影响产生的冗余。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
取得击倒胜利
The champion scored a KO in the second round.
冠军在第二回合击倒对手获胜。
第一回合击倒
He won the fight with a first-round KO.
他在第一回合击倒对手取胜。
击倒性的一拳
She landed a devastating KO punch.
她打出一记毁灭性的击倒拳。
以击倒方式获胜
The referee stopped the fight, so he won by KO.
裁判中止了比赛，他以击倒获胜。
被击倒
The boxer got KO'd in the final round.
那位拳手在最后一回合被击倒。
击倒！
In Street Fighter II, the announcer shouts "K.O.!" when a player lands a knockout punch.
在《街头霸王II》中，当玩家打出击倒拳时，解说员会高喊“K.O.！”
Use kos naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把“KO”想成拳击比赛里的“K.O.”，一拳把人打倒在地，就是“击倒、打倒”。
语域：mixed 常见场景：拳击/搏击运动、体育新闻报道、日常口语 该词作名词指击倒对手的一击，作动词指击倒对手，多用于拳击等搏击运动的比赛解说或体育报道；日常口语中也可引用作比喻，语气较随便。正式或书面程度较高的语境中，比较常见的是使用完整的 knockout 拼写，因此本词的正式程度视语境而变。
ko（KO）读作 /ˌkeɪˈəʊ/。go、no、so、though 都以 /əʊ/ 结尾，与 KO 的 o 音押韵；to、do 虽然也以 o 结尾，但读 /tuː/、/duː/，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.