s发音是s还是z如何区分？

1．在清辅音后读/s/。

例：months/m)nIs/，cakes/keiks/，stops/st&ps/，laughs/ fs/

2．在浊辅音及元音后读/z/。

例：girls /pictures/，potatoes/p+'teit+z/，reads/ri：dz/，digs/digz/，cries/kraiz/

3．在/s/、/z/、/M/、/tM/、/d{/等音后-es发/iz/。

例：glasses/'gla：siz/，bridges/'brid{iz/，noses/'n+uziz/，teaches/'ti：tMiz/，wash-es/'w&Miz/

4、在前缀mis-，dis-中，s读作/s/。

例：mismanage/?mis'm$niDN/，misjudge/?mis'DN)DN/，misbelieve/?misbi'l：v/，disorder/di's&：d+/，disobey/dis+'dei/

5、在后缀－sive，sity，－self，-some，-sy中，s读作/s/。

例：expensive/ik'spensiv/，intensive/in'tensiv/，decisive/di'saisiv/   yourself/ 'self/