Master Mandarin Pronunciation: Top 3 Tone Sandhi Rules

Do you want your Mandarin to sound more native-like to the ear? Understanding and applying these three tone sandhi rules can make all the difference in your pronunciation.

Mandarin Tones

Understanding Tone Sandhi in Mandarin

Mandarin Chinese is a tonal language, which means that the meaning of a word can change depending on its tone. Tone sandhi refers to the phenomenon where the tones of certain words change based on their phonetic environment. Mastering these rules can significantly enhance your fluency and make your speech sound more natural to native speakers. Here, we delve into three essential tone sandhi rules that every Mandarin learner should know: the tone sandhi of “一 (yī)”, “不 (bù)”, and the third tone sandhi.

Tone Sandhi of “一 (yī)”
1. Tone Sandhi of “一 (yī)”

The character “一 (yī)” usually carries the first tone (high-level tone) when used in numerical expressions or at the end of words, such as 第一 (dì yī), 十一 (shí yī), and 统一 (tǒng yī). However, its pronunciation can change depending on the tone of the following syllable.

Shifting to the Fourth Tone
When “一 (yī)” is placed before another first tone, second tone, or third tone syllable, its pronunciation shifts to the fourth tone (falling tone). For example:

  • 一天 (yī tiān) should be pronounced as 一 (yì) 天 (tiān).
  • 一群 (yī qún) should be pronounced as 一 (yì) 群 (qún).
  • 一手 (yī shǒu) should be pronounced as 一 (yì) 手 (shǒu).

Changing to the Second Tone
If “一 (yī)” comes before a fourth tone syllable, its pronunciation changes to the second tone (rising tone). For instance:

  • 一次 (yī cì) should be pronounced as 一 (yí) 次 (cì).
  • 一样 (yī yàng) should be pronounced as 一 (yí) 样 (yàng).
  • 一个 (yī gè) should be pronounced as 一 (yí) 个 (gè).

Neutral Tone Between Identical Verbs
When “一 (yī)” is sandwiched between two identical verbs, it takes on a neutral or natural tone. This often happens in reduplicative verb structures:

  • 看一看 (kàn yī kàn) should be pronounced as 看 一 看 (kàn yi kàn).
  • 试一试 (shì yī shì) should be pronounced as 试 一 试 (shì yi shì).
  • 读一读 (dú yī dú) should be pronounced as 读 一 读 (dú yi dú).

Tone Sandhi of “不 (bù)”
2. Tone Sandhi of “不 (bù)”

The character “不 (bù)” typically carries the fourth tone (falling tone). However, like “一 (yī)”, its tone can change based on the context.

Retaining the Fourth Tone
Before any first, second, or third tone, “不 (bù)” retains the fourth tone. Examples are:

  • 不多 (bù duō) stays 不 (bù) 多 (duō).
  • 不行 (bù xíng) stays 不 (bù) 行 (xíng).
  • 不好 (bù hǎo) stays 不 (bù) 好 (hǎo).

Pronounced in the Second Tone Before a Fourth Tone
Before a fourth tone syllable, “不 (bù)” is pronounced in the second tone (as if it were a rising tone). Examples include:

  • 不对 (bù duì) should be pronounced as 不 (bú) 对 (duì).
  • 不是 (bù shì) should be pronounced as 不 (bú) 是 (shì).
  • 不会 (bù huì) should be pronounced as 不 (bú) 会 (huì).


Light Pronunciation in Phrases
In the middle of repeated verb phrases, the particle “不 (bù)” is pronounced with a neutral tone. For example:

  • 走不走 (zǒu bù zǒu) should be pronounced as 走 (zǒu) 不 (bu) 走 (zǒu).
  • 看不看 (kàn bù kàn) should be pronounced as 看 (kàn) 不 (bu) 看 (kàn).

Third Tone Sandhi
3. Third Tone Sandhi

The third tone (falling-rising tone) in Mandarin is unique in that it undergoes significant changes when it appears consecutively or in specific contexts.

Two Consecutive Third Tones
When two third tones appear consecutively, the first is pronounced as the second tone. For example:

  • 你好 (nǐ hǎo) should be pronounced as 你 (ní) 好 (hǎo).
  • 可以 (kě yǐ) should be pronounced as 可 (ké) 以 (yǐ).


Three Consecutive Third Tones
In a sequence of three third tones, if the first two characters in a sequence are closely related, both are pronounced in the second tone. This usually happens in compound words or set phrases:

  • 展览馆 (zhǎnlǎn guǎn) should be pronounced as 展 (zhán) 览 (lán) 馆 (guǎn).
  • 草稿纸 (cǎogǎo zhǐ) should be pronounced as 草 (cáo) 稿 (gáo) 纸 (zhǐ).


In a sequence of three third tones, if the last two characters are closely related, the middle one is pronounced in the second tone. For instance:

  • 我可以 (wǒ kěyǐ) should be pronounced as 我 (wǒ) 可 (ké) 以 (yǐ).
  • 小拇指 (xiǎomǔzhǐ) should be pronounced as 小 (xiǎo) 拇 (mú) 指 (zhǐ).

How to Improve Mandarin Pronunciation

Listening and Imitation
One of the best ways to master tone sandhi rules is through listening and imitation. Pay close attention to native speakers in conversations, recordings, and media. Mimic their pronunciation and intonation to internalize the rules.

Drills and Exercises
Regular practice through drills and exercises can reinforce your understanding of tone sandhi. Create flashcards, practice with language partners, and use language learning apps that focus on tonal practice.

Professional Coaching
For those serious about mastering Mandarin, professional coaching can provide personalized feedback and structured learning. Experienced teachers can pinpoint your weaknesses and help you apply tone sandhi rules correctly.

Mastering these rules will make your Mandarin pronunciation more authentic and natural. If you want to enhance your Chinese language skills further, our professional Chinese teachers offer one-on-one online live classes can help you improve quickly. Sign up now to claim your free Chinese trial lesson and experience the difference.

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