Chinese · Pronunciation Guide

How do you pronounce "一" in Chinese?

Q: How do you pronounce 一 in Chinese?

一 is pronounced with the stress described below. In IPA it is written /i˥/. It means “one.” "ee", high and level — but only when it stands alone or ends a phrase. In front of other words it changes tone constantly, which makes it one of the most mobile syllables in Mandarin.

"ee", high and level — but only when it stands alone or ends a phrase. In front of other words it changes tone constantly, which makes it one of the most mobile syllables in Mandarin.

一 /i˥/

yī

This is the single most tone-unstable word on the list. Standing alone, counting, or at the end of a number it is a high first tone: yī. Before a fourth tone it becomes a rising second: yí ge, yí cì, yí kuài. Before a first, second or third tone it becomes a falling fourth: yì bēi, yì zhí, yì běn. The character never changes; only your mouth does.

Listen: 一

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Sound it out

y- Written with a y in pinyin only because a syllable cannot begin with a bare i. There is no separate consonant: the syllable is just the vowel, perhaps with the faintest onglide.

-ī A tense, spread "ee" with no diphthong drift. The pitch is held at the top of your comfortable range for the whole duration.

Hear it in a sentence

我只有一个包。

Wǒ zhǐ yǒu yí ge bāo.

I only have one bag.

Listen: 我只有一个包。

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我只有一个包。 shows the rule producing yí ge — 个 is nominally a fourth tone, so 一 rises ahead of it, even though ge itself is usually pronounced toneless in practice. That is a subtle point worth noticing: the sandhi is calculated from the underlying tone, not from the reduced one you actually hear. Earlier, zhǐ yǒu is a third-third pair, so zhǐ rises.

Where English speakers slip

Learners memorise yī, then use that high flat version everywhere, producing yī ge and yī bēi. Native listeners find this immediately foreign, because the tone alternation is automatic for them. The practical fix is never to learn 一 by itself — learn it inside the phrase, so that yí ge and yì bēi are stored as whole units with their tones already attached.