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