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不必bú bìneed not

HSK 4word

By Chinese Copilot · Last updated

不必 (bú bì) means "need not" or "does not have to." It tells someone that an action is unnecessary. 你不必担心 says you need not worry, and 明天不必来了 says you do not have to come tomorrow. It sounds a little more formal than 不用 and can also answer a question by itself.

What does 不必 mean?

  1. 1.

    need notadverb

  2. 2.

    does not have toadverb

What do the characters in 不必 mean?

  • 不(bound form) not; un-
  • 必must

How do you use 不必?

不必 goes before a verb, or stands alone as a short polite reply meaning that something is unnecessary.

Patterns

  • 不必 + Verb

    你不必担心。

    Nǐ búbì dānxīn.

    You need not worry.

  • 不必 + Verb + 了

    明天不必来了。

    Míngtiān búbì lái le.

    You do not have to come tomorrow.

What are some examples of 不必 in a sentence?

  1. 你不必担心。

    Nǐ búbì dānxīn.

    You need not worry.

  2. 明天不必来了。

    Míngtiān búbì lái le.

    You do not have to come tomorrow.

  3. 不必买新的,这个还能用。

    Búbì mǎi xīn de, zhège hái néng yòng.

    There is no need to buy a new one. This one still works.

How is 不必 used in a conversation?

  1. Speaker A:

    我需要带钱吗?

    Wǒ xūyào dài qián ma?

    Do I need to bring money?

  2. Speaker B:

    不必,我已经买好票了。

    Búbì, wǒ yǐjīng mǎi hǎo piào le.

    No need. I have already bought the tickets.

  3. Speaker A:

    那我带点水吧。

    Nà wǒ dài diǎn shuǐ ba.

    Then I will bring some water.

  4. Speaker B:

    好,路上可能会渴。

    Hǎo, lùshang kěnéng huì kě.

    Good. We might get thirsty on the way.

What should you learn next?

English glosses on this page are adapted from CC-CEDICT, published by MDBG (snapshot 2026-10-23), licensed under CC BY-SA 4.0. Glosses were edited for learners.