单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,名词单数变复数口诀,(一)规则变化,名词单数变复数，直接加-s 占多数；,book-books;pen-pens;apple-apples,s,x,z,ch,sh 来结尾，直接加上-es；,dress-dresses;box-boxes;buzz-buzzes;watch-watches;brush-brushes,词尾是 f 或 fe，加-s 之前先变 ve；,leaf-leaves;wife-wives;knife-knives,辅音+y 在词尾，把 y 变 i 再加-es；,study-studies;baby-babies;city-cities,元音+y在词尾,只加s就足够,boy boys;day days;monkey monkeys,词尾字母若是 o，常用三个已足够，,要加-es 请记好，hero,tomato,potato,。,美国黑人和英雄爱吃土豆和西红柿。,negro-negroes;hero-heroes;potato-potatoes;tomato-tomatoes,其余o结尾的词加s,photo-photos;piano-pianos,(二)不规则变化,男人女人 a 变 e，鹅足牙 oo 变 ee；,man-men;woman-women;goose-geese;foot-feet;tooth-teeth,老鼠虱子也好记，ous 变 ic；,mouse-mice;louse-lice,孩子加上 ren，鱼鹿绵羊不用变,child-children;fish;deer;sheep,this-these(这些),that-those(那些),