B、可数名词的复数形式
1、直接在词尾加-s:如desks,maps,cats,pens cars,farms
2、以-s,-x,-ch,sh结尾的词加-es :glasses,classes,buses,boxes,foxes,watches,matches,brushes,dishes(例外:stomachs胃)
3、以-O结尾的词:
Negroes,heres,potatoes,tomatoes(有生命的名词加-es);
photos,pianos,kilos,radios,zoos studios(无生命的名词加-es)。
4、辅音字母+y结尾的,把y变为i再加es :
city-cities,story-stories,baby-babies,dictionary-dictionaries,
factory-factories,fly- flies,diary-diaries
但是,元音字母+y——直接+s toy——toys
5、以-f,-fe结尾的单词,去掉f,-fe 再加ves:
knife-knives,wife-wives,life-lives,wolf-wolves,
thief-thieves,leaf-leaves
例外:roof-roofs屋顶,belief-beliefs信仰,gulf-gulfs海湾
safe-safes,handkerchief-handker chiefs手帕
6、特殊变化:
man-men,woman→woman,
child→children,tooth→teeth,
goose→geese鹅 foot→feet,
mouse→mice,looker-on→lookers-on 旁观者,
passer-by→passers-by过路人,
editor-in-chief→editors-in-chief总编辑,
man-doctor→men doctors,
woman-doctor→women doctors,
fish,deer,Chinese,sheep单复数同形。
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