名词复数规则变化的口诀:名词复数很简单,一般s加后边,遇到s/x和ch/sh 末尾加上es尾巴若是f/ fe,把f或fe变成v,再加es辅音加y需谨慎,把y变成i再加es以O结尾的名词在变成复数时,有生命的加es,没生命的直接加s Negro, hero, potato, tomato 黑人英雄爱吃土豆西红柿各国人的复数形式为:中日友好是一家,英法联盟a变e,其余一律加sa Chinese-Chinesea Japanese-Japanesean Englishman-Englishmena Frenchman-Frenchmenan American- Americans aGerman- Germans名词复数的不规则变化:a)改变元音:foot-feet tooth-teeth goose-geese man-men woman-womenb)无规律:mouse-mice child-children ox-oxen roof-roofsc)单复数相同:fish deer sheep people