此系列值得看看!p-b t-d f-v s-z are pairs of consonants,voiced and unvoiced. ending voice:1. +s --[ss] eg:...
s/z p/b f/v t/d k/g are paired consonants
rule1 if the last sound in a word is unvoiced,and u r adding an s ,then,the s is univoiced too
rule2 if a word ends with one of these sounds s z sh ch dg add izzzzzzz
rule3 if a word ends with a vowel sound... add a voiced z s reading z
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