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The Tone Changes Rules of “一”

1. 一 is pronounced as the 1st tone “” when

  • it’s by itself,
  • it works as a number,
  • it is put at the end of the word, phrase or sentence.


一 (yī)

唯一 (wéi  yī) the one and only

2. 一 is read as the 4th tone “” when it’s followed by a 1st tone, 2nd tone or 3rd tone syllable.


一 + 1st Tone 一斤( jīn)
一 + 2nd Tone 一台( tái)
一 + 3rd Tone 一把( bǎ)

3. 一 becomes the 2nd tone “” when it precedes a 4th tone syllable.


一 + 4th Tone 一样 ( yàng)
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