必须

Let's get straight to it. When you want to say something 'must' or 'has to' happen in Chinese, you'll reach for 必须 (bìxū). It's an auxiliary verb, which means it comes before the main verb. Simple as that.

§ Basic Sentence Structure

The most common way to use 必须 (bìxū) is:

Structure

Subject + 必须 (bìxū) + Verb + Object (if any)

It's pretty direct. Think of it like putting 'must' right before the action in English.

Translation hint: I must study Chinese.

Translation hint: You must go home.

§ Using 必须 (bìxū) with Negation

If you want to say something 'must not' or 'is forbidden,' you use 不 (bù) before 必须 (bìxū). However, this isn't as common or direct as you might think for prohibition. It often implies 'it's not necessary' or 'you don't have to'. For strong prohibitions, you'll usually see other words like 不可以 (bù kěyǐ) or 禁止 (jìnzhǐ).

Structure for 'Don't Have To'

Subject + 不 (bù) + 必须 (bìxū) + Verb + Object

Translation hint: You don't have to work overtime today.

§ Asking Questions with 必须 (bìxū)

To ask if something is necessary or if someone has to do something, you can simply add 吗 (ma) at the end of the statement or use the A-not-A question form.

• With 吗 (ma):

  Structure

  Subject + 必须 (bìxū) + Verb + Object + 吗 (ma)?

  我们必须现在走吗？(Wǒmen bìxū xiànzài zǒu ma?)

  Translation hint: Do we have to leave now?

• With A-not-A (必须不必须):

  Structure

  Subject + 必须不必须 (bìxū bù bìxū) + Verb + Object?

  他必须不必须完成作业？(Tā bìxū bù bìxū wánchéng zuòyè?)

  Translation hint: Does he have to finish the homework or not?

§ When to use 必须 (bìxū) vs. 要 (yào) or 得 (děi)

This is where it can get a little tricky for beginners. While all three can sometimes mean 'must' or 'have to,' their nuance is different. Think of 必须 (bìxū) as the strongest and most formal among them.

• 必须 (bìxū): Strongest obligation, a rule, a definite necessity. There's usually no way around it.

  你必须遵守交通规则。(Nǐ bìxū zūnshǒu jiāotōng guīzé.)

  Translation hint: You must obey traffic rules.

• 要 (yào): Can mean 'to want to' or 'will,' but also 'should' or 'need to' when there's an obligation. It's softer than 必须 (bìxū).

  我要去银行。(Wǒ yào qù yínháng.)

  Translation hint: I need to go to the bank. (More of a personal need/plan)

• 得 (děi): (pronounced děi, not dé) Often expresses a less formal, more practical 'have to' due to circumstances. It's often about consequences if you don't do something.

  你病了，得去看医生。(Nǐ bìng le, děi qù kàn yīshēng.)

  Translation hint: You're sick, you have to see a doctor. (Implies a consequence if not)

§ Understanding 必须 (bìxū)

Alright, let's talk about 必须 (bìxū). This little word is super common and super useful. It means 'must' or 'have to' – there's really no getting around it. If you hear someone use 必须, you know whatever they're talking about is not optional. It's a requirement, a necessity, something that absolutely needs to happen.

Definition

must, have to

Think of it as a strong command or a firm statement of fact. You'll hear it all the time, from everyday conversations to official announcements. Let's break down where you'll actually encounter this word in real life.

§ At Work

In a work setting, 必须 is frequently used to state rules, deadlines, or essential tasks. Your boss might use it, or you might see it in official company communications.

• When talking about company policy:

  所有员工必须遵守公司的规章制度。

  (All employees must comply with company rules and regulations.)

• Regarding task completion:

  这个报告必须在周五之前完成。

  (This report must be finished before Friday.)

• For safety instructions:

  进入实验室必须戴安全帽。

  (You must wear a safety helmet when entering the lab.)

§ At School

Education also comes with its share of 'musts'. Teachers, school administrations, and even students use 必须 to talk about assignments, attendance, and rules.

• For homework or projects:

  学生必须按时交作业。

  (Students must hand in homework on time.)

• Regarding class attendance:

  所有同学必须参加期末考试。

  (All students must attend the final exam.)

• When discussing learning requirements:

  要学好中文，你必须多练习。

  (To learn Chinese well, you must practice a lot.)

§ In the News

News reports, especially those related to government policies, public safety, or international affairs, frequently use 必须 to convey a strong sense of requirement or inevitability.

• For government directives:

  市民出行必须遵守交通规则。

  (Citizens must obey traffic rules when traveling.)

• When discussing necessary actions:

  为了环境保护，我们必须减少塑料使用。

  (For environmental protection, we must reduce plastic use.)

• In statements of principle:

  国家安全必须得到保障。

  (National security must be guaranteed.)