小学英语名词变复数主要有以下几种规则：
一般情况下，直接在名词后加-s
book-books
bag-bags
cat-cats
bed-beds
以s, x, sh, ch结尾的名词，在词尾加-es
bus-buses
box-boxes
watch-watches
brush-brushes
dish-dishes
以辅音字母+y结尾的名词，变y为i，再加-es
family-families
strawberry-strawberries
baby-babies
country-countries
以f或fe结尾的名词，变f或fe为v，再加-es
knife-knives
wife-wives
leaf-leaves
thief-thieves
以o结尾的名词，有生命加-es，无生命加-s
tomato-tomatoes
potato-potatoes
hero-heroes
photo-photos
piano-piano
不规则名词的复数形式
man-men
woman-women
policeman-policemen
policewoman-policewomen
mouse-mice
child-children
foot-feet
tooth-teeth
fish-fish
sheep-sheep
people-people
Chinese-Chinese
Japanese-Japanese
peoples-peoples
建议学生在学习英语名词变复数时，可以采用这些规则进行记忆和练习，并通过实际应用来巩固所学知识。