1. 不可數名詞：
Furniture luggage clothing equipment poetry jewelry machinery weaponry scenery information knowledge evidence foliage health advertising
2.學科名詞(不可數，不加冠詞)：
mathematics economics statistics physics politics mechanics genetics geology geography chemistry philosophy biology history astronomy
3. 單復數特殊名詞：
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.單復數同行 ：
aircraft spacecraft series species means sheep deer fish salmon trout carp starfish jellyfish shellfish walrus
5.可跟that同位從句：
observation， fact， belief， discovery， doubt， statement， conclusion， decision idea，evidence， hope， news， opinion， thought， rumor， explanation， truth。