How to say "I don't know" in Chinese

When To Use It

"I don't know" maps to 我不知道 (wǒ bù zhīdào), a neutral communication phrase for everyday situations.

Communication repair phrases are high-value because they buy you time and keep conversations from breaking down.

Practice it first exactly as written, then swap in your own people, places, or objects so it becomes part of your active speaking repertoire.

Tone And Delivery

The register is neutral, which makes it flexible: safe in most daily situations without sounding stiff or overly intimate.

Because this is marked beginner, you should aim to recognize it instantly and reuse it with your own names, nouns, locations, or numbers.

A good practice target is the example sentence 对不起，我不知道。 (duìbuqǐ, wǒ bù zhīdào.). Once that feels natural, shorten your pause and try it at conversation speed.

Practice Ideas

This phrase becomes more useful when you learn it as part of a mini-sequence. After saying it, a natural next step could be 我明白了 (wǒ míngbái le).

A second nearby phrase to review is 今天是星期几？ (jīntiān shì xīngqī jǐ?), which helps you stay in the same topic instead of translating from scratch again.

• Read the example “Sorry, I don't know.” aloud, then replace one detail with your own information.
• Pair it with “I understand” next so your conversation does not stop after a single line.
• Match the phrase to your tone of voice: soft for polite requests, flatter and quicker for routine daily use.
• If you hear a slightly different version in the wild, compare the tone and context before treating it as interchangeable.