mouth的复数是加s还是加es
mouth复数？
mouth复数？
mouths II. 名词的数：
1. 规则名词的复数形式： 名词的复数形式，一般在单数形式后面加-s或-es。现将构成方法与读音规则列表如下： 规则 例词 1一般情况在词尾加-s map-maps, sea-seas, girl-girls, day-days 2以s, x, ch, sh结尾的名词后加-es class-classes, box-boxes, watch-watches, dish-dishes 3以-f或-fe结尾的词 变-f和-fe为v再加-es leaf-leaves, thief-thieves, knife-knives, loaf-loaves, wife-wives 加-s belief-beliefs, chief-chiefs, proof-proofs, roof-roofs, gulf-gulfs 4以辅音字母加y结尾的名词，变y为i加-es party-parties, family-families, story-stories, city-cities 5以元音字母加y结尾的名词，或专有名词以y结尾的，加-s toy-toys, boy-boys, day-days, ray-rays, Henry-Henrys 6以辅音字母加-o结尾的名词 一般加-es hero-heroes, Negro-Negroes, potato-potatoes, tomato-tomatoes 不少外来词加-s piano-pianos, photo-photos, auto-autos, kilo-kilos, solo-solos 两者皆可 zero-zeros/zeroes, volcano-volcanoes/ volcanos 7以元音字母加-o结尾的名词加-s radio-radios, bamboo-bamboos, zoo-zoos 8以-th结尾的名词加-s truth-truths, mouth-mouths, month-months, path-paths,
2. 不规则名词复数： 英语里有些名词的复数形式是不规则的，现归纳如下： 规则 例词 1改变名词中的元音字母或其他形式 man-men, woman-women, foot-feet, goose-geese, mouse-mice 2单复数相同 sheep, deer, series, means, works, fish, species li, yuan, jin, 3只有复数形式 ashes, trousers, clothes, thanks, goods, glasses, compasses, contents 4一些集体名词总是用作复数 people, police, cattle, staff 5部分集体名词既可以作单数（整体）也可以作复数（成员） audience, class, family, crowd, couple, group, committee, government, population, crew, team, public, enemy, party 6复数形式表示特别含义 customs(海关), forces(军队), times(时代), spirits(情绪), drinks(饮料), sands(沙滩), papers(文件报纸), manners(礼貌), looks(外表), brains(头脑智力), greens(青菜), ruins(废墟) 7表示“某国人”加-s Americans, Australians, Germans, Greeks, Swedes, Europeans 单复数同形 Swiss, Portuguese, Chinese, Japanese 以-man或-woman结尾的改为-men,-women Englishmen, Frenchwomen 8 合成名词将主体名词变为复数 sons-in-law, lookers-on, passers-by, story-tellers, boy friends 无主体名词时将最后一部分变为复数 grown-ups, housewives, stopwatches 将两部分变为复数 women singers, men servants