1、在后面加s。如:fathers,books,Americans,Germans,apples,bananas。
2、x,sh,ch,s,tch后加es。如:boxes,glasses,dresses,watches,wishes,faxes。
3、以辅音字母加y结尾的变y为i再加es如:baby-babies,family-families,duty-duties,comedy-comedies,documentary-documentaries,story-stories。
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