1. 不可数名词： 
　　Furniture luggage clothing equipment poetry jewelry 
　　machinery weaponry scenery information knowledge evidence 
　　foliage health advertising 
2.学科名词（不可数，不加冠词）： 
　　mathematics economics statistics physics politics mechanics 
　genetics geology geography chemistry philosophy biology 
　　history astronomy 
3. 单复数特殊名词： 
　　man/men woman/women tooth/teeth foot/feet goose/geese 
　　basis/bases analysis/analyses crisis/crises hypothesis/hypotheses 
　　axis/axes alga/algae larva/larvae fungus/fungi stimulus/stimuli 
　　datum/data bacterium/bacteria medium/media spectrum/spectra 
　　mouse/mice child/children phenomenon/phenomena 
4.单复数同行 ： 
　　aircraft spacecraft series species means sheep deer fish 
　　salmon trout carp starfish jellyfish shellfish walrus 
5. 可跟that同位从句： 
　　observation, fact, belief, discovery, doubt, statement, conclusion, decision idea, 
　　evidence, hope, news, opinion, thought, rumor, explanation, truth