哪些字母结尾的单词复数加es,哪些加s?还有哪些情况

①“一般是在单数名词后面加s”,如apple_apples.friend_friends.
②“s”结尾,加es,如：dress_dresses.bus_buses.
③“f或fe”结尾,f或fe变ve加s,如：wife_wives.knife_knives.
④“o”结尾,加es,如：tomato.potato.hero.negro.
⑤“oo组合”的词,变ee,如：tooth_teeth.foot_feet.goose_geese.
⑥“不规则变化”,如：man_men.woman_women.milkman_milkmen.