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The Four Tones & Pinyin

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Mandarin is a tonal language

In Mandarin, pitch is part of a word — change the tone and you change the meaning. The classic set is built on one syllable, ma: 妈 (mā, “mother”), 麻 (má, “hemp”), 马 (mǎ, “horse”), and 骂 (mà, “to scold”). The four tones are: first (high and level, ā), second (rising, like a question, á), third (dipping down then up, ǎ), and fourth (sharply falling, à). Because families and communities are full of names and kinship words, tones matter from your very first sentence — mixing up 妈 (mā) and 马 (mǎ) turns “mother” into “horse.”

How pinyin is built

Pinyin is the romanization that spells Mandarin sounds with the Latin alphabet. A syllable is usually an initial (a starting consonant) plus a final (the vowel core), carrying one tone mark: 家 (jiā, “home / family”) is initial j + final ia + first tone. The tone mark sits on the main vowel. The priority order is simple: a and e always take the mark; in ou it goes on o; otherwise it lands on the last vowel. So we write hǎo, not haǒ, and jiā, not jīa.

The neutral tone and third-tone sandhi

Some syllables are toneless — the neutral tone, said light and short, with no mark: 妈妈 (māma, “mom”), 爸爸 (bàba, “dad”), 哥哥 (gēge, “older brother”). Mandarin also has a sound-change rule called tone sandhi: when a third tone is followed by another third tone, the first one becomes a second tone. So 你好 is written nǐ hǎo but actually pronounced ní hǎo (“hello”). The spelling keeps the original marks; only the pronunciation shifts.

Worked example

A student wants to greet an elder politely and say 你好 (nǐ hǎo, “hello”). Both syllables carry a third tone in writing. How should it actually be pronounced, and why?

  1. 1.Identify the tones as written: 你 is nǐ (third tone) and 好 is hǎo (third tone) — two third tones in a row.
  2. 2.Apply third-tone sandhi: when a third tone is followed by another third tone, the first shifts to a second (rising) tone.
  3. 3.So 你 nǐ is spoken as ní (rising), while 好 hǎo keeps its third tone.
  4. 4.The written pinyin does not change; only the spoken pitch does.
Answer: Say it as ní hǎo: the first third tone (你 nǐ) rises to a second tone before the second third tone (好 hǎo). This sandhi rule keeps rapid speech smooth, even though we still write nǐ hǎo.
Checkpoint

Which syllable means “horse,” distinguished from “mother” only by its tone?

Watch out

A common beginner error is putting the tone mark on the wrong vowel. Follow the rule: a and e win first, then o in ou, otherwise the last vowel. Write jiā (not jīa) and hǎo (not haǒ). A misplaced mark still counts as sloppy pinyin on the exam.

Checkpoint

The phrase 我很好 is written wǒ hěn hǎo (“I’m very well”). Because of third-tone sandhi, how do the first two syllables change in speech?

On the exam

On the AP interpersonal speaking task, examiners hear your tones. Practice the four-tone chart aloud with real family words — 妈妈 (māma), 弟弟 (dìdi, “younger brother”), 姐姐 (jiějie, “older sister”) — so accurate pitch becomes automatic before you have to think about grammar.

Answer the 2 checkpoints as you read.

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