单数名词变复数的规则
英语名词单数变复数遵循以下规则：
1. 一般规则 ：在名词词尾直接加`-s`。
bag → bags
book → books
以`s`, `x`, `ch`, `sh`结尾的名词，在词尾加`-es`。
box → boxes
class → classes
match → matches
3. 以`y`结尾 ：
辅音字母加`y`结尾，将`y`变为`i`再加`-es`。
baby → babies
country → countries
元音字母加`y`结尾，`y`不变，直接加`-s`。
boy → boys
toy → toys
4. 以`f`或`fe`结尾 ：
通常将`f`或`fe`变为`v`再加`-es`。
knife → knives
wife → wives
leaf → leaves
5. 不规则变化 ：
man → men
woman → women
child → children
foot → feet
tooth → teeth
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
goose → geese
man → men
woman → women
mouse → mice
ox → oxen
deer → deer
sheep → sheep
bread → bread
juice → juices
