名词变复数的口诀是:
(一)一般情况加s;
(二)以s、sh、ch、x结尾加es;
(三)以辅音字母加y结尾,变y为i再加es;
(四)以辅音字母加o结尾的,有生命的加es,无生命的加s;
(五)以f和fe结尾的,去f和fe变ves
eg.
1.直接加-s.
如: tree-trees, pig-pigs, table-tables, desk-desks, card-cards.;
2.以s、sh、ch、x结尾加es
如:peach-peaches, bus-buses, box-boxes, duty-duties, watch-watches, glass-glasses.
3.以辅音字母+ y结尾的,改y为i再加es.
country-countries, city-cities , baby-babies, family-families,
特殊变化:boy-boys, monkey-monkeys, toy-toys, play-plays
4.以f或者fe 结尾的词,改f为v,再加es.
knife-knives, leaf-leaves , wife -wives.
5、以O结尾的单词,有生命的+-es,无生命+s.
Hero-heroes , Negro-negroes , potato-potatoes , tomato-tomatoes ,mango-mangoes.