"Iōng-chiá:Pektiong/Pe̍h-oē-jī Chiàⁿ-jī-hoat" pán-pún chi-kan bô-kāng--ê tē-hng
刪去的內容 新增的內容
Tē 81 chōa:
* Can be reproduced using sonority hierarchy of a > e > o > i >u ? (ans=no. "iú" is the only exception)
* Can be reproduced using sonority hierarchy of a > e, o > i, u ? (ans=no. many exceptions)
* http://en.wikipedia.org/wiki/Pinyin#Rules_for_placing_the_tone_mark
The rules for determining on which vowel the tone mark appears are as follows:
# If there is more than one vowel and the first vowel is ''i'', ''u'', or ''ü'', then the tone mark appears on the second vowel.
# In all other cases, the tone mark appears on the first vowel
(''y'' and ''w'' are not considered vowels for these rules.)
The reasoning behind these rules is in the case of [[diphthong]]s and [[triphthong]]s, ''i'', ''u'', and ''ü'' (and their orthographic equivalents ''y'' and ''w'' when there is no initial consonant) are considered [[medial (linguistics)|medial]] glides rather than part of the [[syllable nucleus]] in Chinese [[phonology]]. The rules ensure that the tone mark always appears on the nucleus of a syllable.
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