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The first of two consecutive Mandarin third tones changes to a rising sound in natural speech.
You may have learnt that the third tone falls and then rises. Yet native speakers do not pronounce every third tone as a full dip. Put two third tones together and the sound changes again. This first article in our two-part tone-sandhi series explains the pattern behind 你好 (nǐ hǎo; spoken approximately ní hǎo) and shows you how to practise it without sounding robotic.
Why two third tones cannot stay the same
In a two-syllable group, the first third tone rises and the second stays low.
When two third tones occur together, the first is pronounced with a rising, second-tone-like contour:
你好 (nǐ hǎo; spoken approximately ní hǎo): hello
很好 (hěn hǎo; spoken approximately hén hǎo): very good
可以 (kěyǐ; spoken approximately kéyǐ): can; may
The tone marks normally keep the original dictionary tones. Write 你好 (nǐ hǎo), even though you hear a rise on the first syllable. This lets dictionaries show the underlying tone while speakers apply the change automatically.
The changed sound resembles a second tone, but advanced phonetic studies show that it need not be identical in every context. Beginners do not need to chase that distinction. Aim for a clear rise followed by a low third tone.
The “half third tone” in everyday speech
A full third tone is easiest to hear when a syllable stands alone or receives emphasis. Before another syllable, it often stays low and does not complete the final rise. In 很忙 (hěn máng), meaning very busy, the first syllable is usually low rather than dramatically dipping and rising.
This is sometimes called a half third tone. It is not a fifth tone to memorise; it is the usual shape of the third tone in connected speech. A common misunderstanding is that careful Mandarin means completing every textbook contour. In fact, doing so can make a sentence slow and choppy.
With three or more third tones, meaning and rhythm decide how speakers group them. For 我很好 (wǒ hěn hǎo), meaning I am very well, practise the whole sentence from a reliable recording instead of applying a rigid character-by-character formula.
Mandarin pinyin usually records dictionary tones rather than every pitch change created by connected speech.
Build the pattern into muscle memory
Practise short chunks first: 你好 (nǐ hǎo), 很好 (hěn hǎo) and 可以 (kěyǐ). Listen once, repeat immediately, then record yourself. Check whether the first syllable rises and whether the following third tone remains comfortably low.
Trace the movement with your hand if useful. Avoid raising your volume: tone is pitch, not loudness. When speaking with people in China, keep the phrase together instead of pausing between characters. A smooth, recognisable rhythm matters more than an exaggerated perfect dip.
For more work on the rising contour, use our Mandarin second-tone guide. Then continue to Part 2: the tone changes of 不 (bù) and 一 (yī).
Useful Chinese Words and Phrases
- 变调tone change; tone sandhi
- 你好hello
- 很好very good
- 可以can; may
A Short Everyday Conversation
Tutor: 再说一次“你好”。
Zài shuō yí cì “nǐ hǎo”.
Say “hello” once more.
Learner: 你好。第一个字要往上升吗？
Nǐ hǎo. Dì-yí ge zì yào wǎng shàng shēng ma?
Hello. Should the first character rise?
Tutor: 对，很好！两个三声在一起，第一个要变调。
Duì, hěn hǎo! Liǎng ge sānshēng zài yìqǐ, dì-yí ge yào biàndiào.
Yes, very good! When two third tones are together, the first changes.
Final Takeaway
Treat common third-tone combinations as complete sound patterns. Let the first of two third tones rise, keep an ordinary third tone low before another syllable, and use recordings for longer groups.