1. 清辅音后读/s/: mistakes, cats, books
2. 浊辅音和元音后读/z/: champions, friends, losers, bows, calls
3. 以s, sh, ch, x等结
尾的词加-es读/iz/: buses, watches, foxes
4. 以ce, se, ze, (d)ge等结尾的词加 -s 读/iz/: pieces, licenses, roses, languages
5. 以辅音字母+y结尾的词变y为i再加-es读/z/: babies, stories
6. 以-o结尾的表示生命的名词加-es读/z/: tomatoes, potatoes
