名词复数变化名词复数变化规则：•1.一般情况直接+s；•2.以s,x,ch,sh结尾的单词，加es;名词复数变化规则：•3.以元音字母+y结尾的，直接+s;如：boy----boys•以辅音字母+y结尾的，把y变i再+es;如：city----cities•4.“以字母O”结尾的，有生命的+es;无生命的+s;•常见的单词为：•tomato西红柿potato土豆hero英雄Negro黑人•可总结为一句话：黑人英雄在西红柿地里吃土豆。•注：以oo结尾的直接+s；均可。如：zero-zeros/zeroes名词复数变化规则：•5.以f,fe结尾的单词•(1)、变f或fe为v再加-es的•树叶半数自己黄，妻子拿刀去割粮；•架后窜出一只狼，就像小偷逃命忙。•【解释】•在这些词中，由单数变复数时，须先将f或fe变为v再加-es变成复数，即：树叶leaf-leaves,半数half-halves,妻子wife-wives,刀knife-knives,架shelf-shelves,狼wolf-wolves,小偷thief–thieves，生命life-lives.•以f,fe结尾的单词•(2)、直接在词尾加-s的•海湾农奴信酋长，悬崖证据藏顶房。•【解释】•在这些词中，由单数变复数时，直接在词尾加-s构成，即：•海湾（gulf--gulfs）农奴（serf--serfs）信任（belief--beliefs）酋长（chief--chiefs）悬崖（cliff--cliffs）证据（proof--proofs）顶房（即房顶、屋顶roof--roofs）•以f,fe结尾的单词•(3)、以上两种情况均可的•码头侏儒围围巾，手绢复数变二心。•【解释】•在这些词中，由单数变复数时，以上两种情况均可，即：•码头（wharf）侏儒（dwarf）围巾（scarf），手绢（handkerchief）复数变二心（即以上两种情况均可。•6.不可数名词没有单复数变化；7.不规则变化(1)变元音man–men,woman–women,foot–feet,goose–geese,tooth–teeth,(2)变词尾mouse–mice，louse-liceox–oxen,child–children(3)不变deer,sheep,fish，Chinese,Japanese•8.国人变化规则：•中日不变，英法变，其他后面加S•Japanese—Japanese•Chinese—Chinese•Englishman--Englishmen•Frenchman—Frenchmen•American—Americans•German–Germans•Swedish--Swedishes•9：复合名词复数形式•(1)中间没有连字符的合成名词在词尾变复数;•bookshelf——bookshelves•bedroom------bedrooms•(2)man和woman构成的复合名词，二者均变为复数。•manfarmer——menfarmerswomanteacher——womenteachers•(3)中间有连字符的合成词，在主体词(中心意义的词)末尾变为复数。•sister-in-law——sisters-in-law•father-in-law-----fathers-in-law岳父•looker-on——lookers-on旁观者•editor-in-chief——editors-in-chief总编•(4)无主体名词时将最后一部分变为复数•sit-in—sit-ins静坐抗议grown-up—grown-ups成年人passer-by——passer-bys•touch-me-not——touch-me-nots凤仙花（含羞草）•go-between——go-betweens中间人•(5)以两个名词构成的复合名词(前面的名词为man或woman除外)，一般把后面的名词变复数。•如：boyfriend→boyfriends•paperbag→paperbags•roomnumber→roomnumbers习题：•orange__________•class__________scarf__________monkey__________•piano(钢琴)_______•life__________orangesclassestextsmonkeyspianoslives•rabbit__________shelf__________bed__________•family__________•toy__________•radio(收音机)__________rabbitsshelvesbedsfamiliestoysradios•photo(相片)__________army__________fox__________•knife__________•boy__________•egg__________photosarmiesfoxesknivesboyseggs•tree__________•knife__________•cat__________•animal__________•roof__________•car__________treesknivescatsanimalsboatscars•watch__________•sweater__________•box__________•elephant__________•horse__________documentary__________watchessweatersboxeselephantshorsesdocumentaries•movie__________•comedy__________•action__________•zoo__________•potato__________•foot__________moviescomediesactionszoospotatoesfeet•bus__________•dish__________•map__________•month__________•co...
