1)sheep,deer,swine,fish,cod,salmon,trout
但在表示不同种类时可加-s、又如fox,hare,tiger,bear,heron等单数形式,是猎人用语
2) dozen,score(20),head(头数),stone( 14磅重量),brace,stand,series,species,craft,foot,sail,change,horse.
例如: two dozen of these,a hundred species of fish,allkinds of craft,20 head of cattle,six hundred,ten stone.
(但要说hundreds of,thousands of years.)
3) corps,abatis,chamois,rendezvous,faux pas,chassis,patois.这些词为法语词,单数时s不读音,用作复数时s读作[z]
4) data,errata,phenomena,stamina,strata.这些词为拉丁语,原为复数形式,也可用作单数
5)Chinese,Japanese,Burmese,Vietnamese,Swiss,Sioux.