| 一旦 (yīdàn) is used to express what would happen after a certain condition is met. Usually, it is used with 就. This grammar pattern expresses that "once" one thing happens, "then" something else will happen. This structure is similar to the English "once... then," as in "once I get my hands on you, you'll wish you'd never been born."  Structure: 一旦 + Condition，Subj. + 就 + Consequence Examples: 一旦发生事故，你要负责！(yīdàn fāshēng shìgù, nǐ yào fùzé) = In case of an accident, you're responsible! 有些人一旦有了钱，就变了。(yǒuxiē rén yīdàn yǒu le qián, jiù biàn le) = Some people change as soon as they have money. 一旦你的公司上市，你就可以变成有钱人。(yīdàn nǐ de gōngsī shàngshì, nǐ jiù kěyǐ biànchéng yǒuqiánrén) = Once your company goes public, you'll be a rich man. 这张桌子不稳定，一旦发生什么小小的振动，就会倒塌。(zhè zhāng zhuōzi bù wěndìng, yīdàn fāshēng shénme xiǎoxiǎo de zhèndòng, jiù huì dǎotā) = This table isn't very stable. If there's even a small vibration, it will fall over. 千万不要在经济泡沫中炒股，一旦市场崩溃，你会很后悔的！(qiānwàn bùyào zài jīngjì pàomò zhōng chǎogǔ, yīdàn shìchǎng bēngkuì, nǐ huì hěn hòuhuǐ de) = You absolutely must not trade stocks in an economic bubble. Once the market collapses, you will regret it! 一旦做出决定，就没有借口，只有认真去做。(yīdàn zuòchū juédìng, jiù méiyǒu jièkǒu, zhǐyǒu rènzhēn qù zuò) = Once a decision is made, there are no more excuses, and all you can do is take it seriously and do it. 人一旦在一个很舒服的环境中，就不想继续努力了。(rén yīdàn zài yī gè hěn shūfu de huánjìng zhōng, jiù bù xiǎng jìxù nǔlì le) = Once you're in a comfortable environment, you don't want to keep trying. 一旦提高价格，你会失去很多客户的。(yīdàn tígāo jiàgé, nǐ huì shīqù hěn duō kèhù de) = If you raise your prices, you will lose a lot of customers. 这种病很复杂，一旦染上，很难治好。(zhè zhǒng bìng hěn fùzá, yīdàn rǎnshàng, hěn nán zhì hǎo) = This disease is very complicated and once you've contracted it, it's hard to cure. # Our teachers # More than 10 years teaching experience Master Degree Certificate for teaching chinese as a foreign language   # About us # Founded in 2007 Chinese test and training center 200+ Chinese teachers 5000+ students  # Contact us# Name:fiona Phone number:021-52287809,13918358891 E-mail:info@mandarinmorning.com www.mandarinmorning.com If you are interested to join Mandarin Morning school or want more details about our services, scan the following QR code. ☟   Mandarin Morning Chinese test center attached to Confucius institute headquarters Authorized Test Center and Training Center for International Chinese Language Teacher Certificater 10 years+ ，200 teachers ，more 10000 students，200+companies  |
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