文档介绍：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)
练****题
写出下列各词的复数
that_______ man______
this ________ watch _______
child _______ photo ________ day________