How do you use 大意失荆州 in a sentence?
Our team was leading the whole match, but we got too relaxed in the last five minutes and lost, what a case of da yi shi Jingzhou.
我们队整场比赛都领先，可最后五分钟太放松，结果输了，真是大意失荆州。
She thought her science project was already perfect, so she ignored the teacher’s reminders and forgot to bring an important chart on presentation day. She really lost something important through carelessness.
她以为自己的科学作业已经很完美了，所以没听老师的提醒，展示那天忘了带一张重要的图表，真是大意失荆州。
Dad never backs up his computer files because he believes nothing will happen, but when the hard drive crashed, he said he had done a real da yi shi Jingzhou.
爸爸从不备份电脑文件，因为他觉得不会出事，可硬盘一坏，他就说自己这回真是大意失荆州。
When does it fit — and when doesn't it?
✓ Fits
The class monitor assumed no one would disturb the display board, so she didn’t check it before the open house; when she arrived, the key posters were missing. This is exactly da yi shi Jingzhou.
班长以为不会有人动展示板，所以开放日之前没有检查；等她到时，几张重要海报已经不见了，这正是大意失荆州。
✗ Doesn't fit
After months of hard practice, he won first prize in the piano competition, so we say he did da yi shi Jingzhou.
经过几个月的努力练习，他在钢琴比赛中得了第一名，所以我们说他大意失荆州。
Why?
The idiom describes losing an important advantage because of carelessness or overconfidence, not achieving success through effort.
这个成语是指因为疏忽或自满而失去重要的人事物，不是指靠努力取得成功。
Common mistake
Using the idiom for any ordinary mistake, even when nothing important was lost.
把这个成语用在任何普通小错误上，即使并没有失去重要的东西。
Correction
Use it when someone becomes careless, too confident, or ignores warnings and then loses something significant.
应该用在一个人因为疏忽、自满或不听提醒，结果失去重要的人事物的时候。
Why does this error happen?
This error happens because learners notice the word da yi (carelessness) but forget that the idiom also includes a serious loss like losing Jingzhou.
What do exams test about this idiom?
In PSLE or HSK-style questions, this idiom is usually tested by asking whether it fits situations involving carelessness or overconfidence that lead to an important loss.
小测验 · Quick Quiz
Test your understanding
1. What does 大意失荆州 mean?
大意失荆州是什么意思？
To launch a bold surprise attack and win an unexpected victory
发动大胆的突袭，赢得出乎意料的胜利
To lose something important because of carelessness, overconfidence, or ignoring warnings
因为粗心大意、过度自信或无视警告，痛失重要的东西
To give something up willingly in exchange for a greater prize later
主动放弃某物，以换取日后更大的收获
2. When the second warning messenger arrived from Jingzhou, what was Guan Yu doing?
荆州第二位报信的使者赶到时，关羽正在做什么？
He was resting in his tent and did not hear the messenger arrive
他正在帐中休息，没有听到信使到来
He was writing urgent letters back to Liu Bei about his battle plans
他正在给刘备写紧急书信，汇报自己的作战计划
He kept his eyes fixed on the Fancheng battle maps instead of heeding the warning
他的目光一直盯着樊城的地图，没有理会这个警告
3. Which sentence uses 大意失荆州 correctly?
哪个句子正确地使用了大意失荆州？
After months of hard practice, he won first prize in the piano competition — that was 大意失荆州.
经过几个月的刻苦练习，他在钢琴比赛中获得了一等奖——这就是大意失荆州。
Our team was winning the whole match, got too relaxed in the last five minutes, and lost — what a case of 大意失荆州.
我们的队伍领先了整场比赛，最后五分钟却放松了警惕，结果输了——真是大意失荆州。
She saved up carefully for a whole year and finally bought the bicycle she wanted — a perfect 大意失荆州.
她认真存钱整整一年，终于买到了心仪的自行车——这真是大意失荆州。
Answers: 1B · 2C · 3B
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智慧典故系列 · Wisdom Series · Tales of China