怎样用s,es,ves为后缀组成名词复数形式,有哪些常见的不规则复试形式?

1.pen--pens,desks,years,tigers,docdors
2.study--studies bodies babies ladies cities
3.half--halves wives selves leaves knives
4.box--boxes fishes glasses classes bosses
5.potato--potatoes,tomatoes heroes negroes
6.chid-children,foot-feet,goose-geese,mouse-mice sheep-sheep man- men woman-women
一般情况是加s的 teacher teachers
还有就是改y加ies 或者es的,country counties