3.常考的单复数同型的名词 aircraft spacecraft series species means sheep deer bison salmon trout carp
4. 常考的可数名词 discovery cloud mineral metal substance population effort effect animal plant mammal insect tree herb shrub element function feature picture result clue star reason audience device structure human human being system fashion resource source origin pioneer automobile purpose style response number amount variety quantity type kind influence emotion change
5. 即可数又不可数的名词 sugar , cloth , water , detail , paper ,work , light , science ,form , interest , art , area ,color , disease , illness , rock , stone , matter , food , culture ,noise , liquid , solid , gas , climate , film ,material , population , temperature , experience ,speech ,use time , life , action , activity , study rock(砂岩) rocks(块岩) work(工作,作品) works(著作) paper(纸) papers(论文,报告,文件) area(面积) areas(地区,区域) time(时间) times(次数) room(空间) rooms(房间) water(水) waters(水域) collections由同一种物品构成,可数 his three collections of short stories collection 由不同种物品构成,不可数 his art collection