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1、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-appless,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
2、 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
3、上 ren，鱼鹿绵羊不用变child-children;fish;deer;sheepthis-these(这些)that-those(那些),6不规则名词复数：man-men,woman-women,policeman-policemen,mouse-mice child-children foot-feet,.tooth-teeth fish-fish,people-people,Chinese-Chinese,Japanese-Japanese7.表示由两部分构成的东西，如：glasses(眼镜)trousers,clothes 若表达具体数目，要借助数量词 pair(对，双);suit(套);a pair of glasses;two pairs of trousers 8.单复同形 如：deer，sheep，fish，Chinese，Japanese,
