1一般不可細(xì)分的東西如water,milk,money,抽象的東西是不可數(shù)(noncountable,簡(jiǎn)稱為N),如importance,happiness,situation,circumstance2一般可以細(xì)分的東西,具體的東西如desk,chair,umbrella,是可數(shù)名詞(countable,簡(jiǎn)稱是C)3有時(shí)候不可數(shù)名詞也可以當(dāng)做可數(shù)名詞來(lái)用,這時(shí)候需要根據(jù)具體的語(yǔ)境來(lái)判斷,如seldomcanunderstandtherealimportanceoftime又如Seldomcanunderstandtherealimportancesforpeopleofdifferentbackgrounds