How common it is
必须 appears often in everyday Chinese, so it is worth practicing early and reviewing often.
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Pronunciation focus
Say bì xū slowly first, then repeat it in a short phrase. Listen for the tone shape.
Usage note
必须在中文中表示‘必须’或‘必要’的意思，通常用于强调某件事情是必不可少的。
bì xū zài zhōng wén zhōng bǐng ‘必须’ huò ‘必要’ de yì思，tōng cháng yòng yú yāo qiú měi jiàn shì qing shì shì bù kě bǎo bì de。
必须 is used in Chinese to mean 'must' or 'necessary', usually to emphasize that something is essential.
Context note
必须常见于日常对话中，比如在安排活动或做决定时强调某件事情的重要性。
bì xū cháng jiàn yú ráo rì huà huà zhōng, bǐ 如 ‘安排活动时必须早点出发’ 或 ‘做决定之前必须考虑清楚’。
Must is commonly found in daily conversations, such as when arranging activities or making decisions to emphasize the importance of something.
5 examples
我们必须早点起床。
wǒ men bì xū zǎo diǎn qǐ chuáng。
We must get up early.
这件事必须认真对待。
zhè jiàn shì bì xū rèn zhēn duì dài。
This matter must be taken seriously.
我们必须按时完成作业。
wǒ men bì xū àn shí wán chéng zuò yè。
We must finish our homework on time.
妈妈说我们必须吃早餐。
mā ma shuō wǒ men bì xū chī zǎo cān。
Mom says we must eat breakfast.
这个项目必须在月底前完成。
zhè ge xiàng mù bì xū zài yuè dǐ qián wán chéng。
This project must be completed by the end of the month.
5 mini stories
妈妈说我们必须早点起床，因为这样可以有更多的时间准备早餐。
mā ma shuō wǒ men bì xū zǎo diǎn qǐ chuáng， yīn wèi zhè yàng kě yǐ yǒu gèng duō de shí jiān zhǔn bèi zǎo cān。
Mom says we must get up early because that way we can have more time to prepare breakfast.
老师告诉我们必须认真听讲，这样才能学好知识。
lǎo shī gào sù wǒ men bì xū rèn zhēn tīng jiǎng， zhè yàng cái néng xué hǎo zhī shi。
The teacher tells us we must listen carefully so we can learn the knowledge well.
我们必须按时完成作业，否则会被批评。
wǒ men bì xū àn shí wán chéng zuò yè， fǒu zé huì bèi pī píng。
We must finish our homework on time, or we will be criticized.
妈妈说我们必须吃早餐，因为不吃早餐对身体不好。
mā ma shuō wǒ men bì xū chī zǎo cān， yīn wèi bù chī zǎo cān duì shēn tǐ bù hǎo。
Mom says we must eat breakfast because not eating breakfast is bad for our health.
这个项目必须在月底前完成，否则会影响整个团队的工作进度。
zhè ge xiàng mù bì xū zài yuè dǐ qián wán chéng， fǒu zé huì yǐng xiǎng zhěng gè tuán duì de gōng zuò jìn dù。
This project must be completed by the end of the month, or it will affect the progress of the whole team's work.