关于英语名词复数的不规则变化

1.变内部元音
foot-feet
man-men
mouse-mice
tooth-teeth
woman-women

2.词尾加-en
child-children
ox-oxen

3.形式不变,即单复数同型(通形名词)
deer-deer
fish-fish
means-means
series-series
sheep-sheep

4.加-es(是加-s的特殊情况)
match-matches
tomato-tomatoes

5.去y改i加-es或去f改v加-es(亦为加-s的特殊情况)
leaf-leaves

6.外来词的不规则变形
ovum-ova
locus-loci
basis-bases

(不少外来词有两种复数形式)
focus-foci/focuses
cactus-cacti/cactuses
fungus-fungi/funguses

我知道的就那么多了...

以ch sh x s z结尾的加es 如box-boxes dish-dishes quiz-quizzes ......
辅音字母加y结尾的 把y变成i加es 如baby-babies fly-flies family-families factory-factories ......
特殊的 如man-men woman-men child-children sheep-sheep ......
以f fe结尾 把f fe变成v加es 如knife-knives life-lives half-halves loaf-loaves ......

+es 例：boxes
变y为i加es :try----tries