1.直接+s的;desk,book,chair,window,pen,pencil,ruler,leg,word,pear,apple,banana,hand,note,bag,cat,dog,door,arm,orange2.以s,x,ch,sh结尾的+es的bus,class,box,peach,watch,dish,brush,match,glass,wish,fox,flash3.辅音+o结尾+es(有生命)tomato,potato,hero,mango,taro,Negro,torpedo,bingo4.元音+o结尾+s(无生命)zoo,radio,piano,photo,silo,video5.单复同型的deer;fish;cannon;sheep;salmon,chinese,japanese,cattle6.特殊的man→men;woman→women;child→children;person→people;ox→oxen,大致就是这么多,常用的,考试用得着的,多了也是生僻词,作用不大.