Key(複數形式)是什麼?

Key(複數形式)是什麼?

keys
1、名詞由單數變複數的基本方法如下:
①在單數名詞詞尾加s.如:map→maps,boy→boys,horse→horses,table→tables.
②s,o,x,sh,ch結尾的詞加es.如:class→classes,box→boxes,hero→heroes,dish→dishes,bench→benches.
[注]:少數以o結尾的詞,變複數時只加s.如:photo→photos,piano→pianos.
③以輔音字母加y結尾的名詞,變y為i,再加es.如:family→families,city→cities,party→parties.
④以f或fe結尾的名詞,變f或fe為v,再加es.如:shelf→shelves,wolf→wolves,life→lives,knife→knives.
2、不規則變化:man→men,woman→women,sheep→sheep,tooth→teeth,fish→fish,child→children,ox→oxen,goose→geese
不可數名詞一般沒有複數形式,說明其數量時,要用有關計量名詞.如:a bag of rice→two bags of rice,a piece of paper→three pieces of paper,a bottle of milk→five bottles of milk.