名词：种类，复数，名词所有格·名词分为可数名词和不可数名词1)不可数名词无法分开的东西：water, tea, bread, milk, rice(米)抽象的东西：love, beauty, coldness(寒冷)不可数名词有以下特点：·不能用a, an修饰·不能加s·和单数be动词或动词搭配2)可数名词：单数可数名词要用冠词修饰，复数可数名词要在名词后面加s,名词复数共有以下几种变化：规则变化的名词复数形式规则1 一般情况+s e.g. shell→shells book→books规则2 以s, x, ch, sh结尾+es e.g. fox→foxes church→churches, bus→buses, watch→watches规则3 以o结尾+s或+es e.g. potato→potatoes, Negro→Negroes, hero→heroes, tomato→tomatoes，(口诀：黑人英雄爱吃土豆和西红柿)，剩下一般加s, radio→radios规则4 以f, fe结尾的，变f, fe为ves e.g. life→lives half→halves, shelf→shelves, city→cities, wife→wives规则5 以辅音字母+y结尾， 变y为i+es e.g. sky→skies fly→flies3)不规则变化的名词复数形式man(men) woman(women) foot(feet) goose(geese) tooth(teeth)0child(children) sheep(sheep) deer(deer) mouse(mice) fish(fish)