1) 以y結尾的專有名詞,或元音字母+y 結尾的名詞變復數(shù)時,直接加s變復數(shù)：
如：two Marys the Henrys
monkey---monkeys holiday---holidays
比較：層樓：storey ---storeys story---stories
2) 以o 結尾的名詞,變復數(shù)時：
a.加s,如：photo---photos piano---pianos
radio---radios zoo---zoos；
b.加es,如：potato--potatoes tomato--tomatoes
c.均可,如：zero---zeros / zeroes
3) 以f或fe 結尾的名詞變復數(shù)時：
a.加s,如：belief---beliefs roof---roofs
safe---safes gulf---gulfs；
b.去f,fe 加ves,如：half---halves
knife---knives leaf---leaves wolf---wolves
wife---wives life---lives thief---thieves；
c.均可,如：handkerchief:
handkerchiefs / handkerchieves
名詞復數(shù)的不規(guī)則變化
1）child---children foot---feet tooth---teeth
mouse---mice man---men woman---women
注意：與 man 和 woman構成的合成詞,其復數(shù)形式也是 -men 和-women.
如：an Englishman,two Englishmen.但German不是合成詞,故復數(shù)形式為Germans；Bowman是姓,其復數(shù)是the Bowmans.
2）單復同形 如：
deer,sheep,fish,Chinese,Japanese
li,jin,yuan,two li,three mu,four jin
但除人民幣元、角、分外,美元、英鎊、法郎等都有復數(shù)形式.如:
a dollar,two dollars; a meter,two meters
3）集體名詞,以單數(shù)形式出現(xiàn),但實為復數(shù).
如：people police cattle 等本身就是復數(shù),不能說 a people,a police,a cattle,但可以說
a person,a policeman,a head of cattle,the English,the British,the French,the Chinese,the Japanese,the Swiss 等名詞,表示國民總稱時,作復數(shù)用.
如：The Chinese are industries and brave.中國人民是勤勞勇敢的.
4）以s結尾,仍為單數(shù)的名詞,如：
a.maths,politics,physics等學科名詞,為不可數(shù)名詞,是單數(shù).
b.news 是不可數(shù)名詞.
c.the United States,the United Nations 應視為單數(shù).
The United Nations was organized in 1945.聯(lián)合國是1945年組建起來的.
d.以復數(shù)形式出現(xiàn)的書名,劇名,報紙,雜志名,也可視為單數(shù).
"The Arabian Nights" is a very interesting story-book.
是一本非常有趣的故事書.
5) 表示由兩部分構成的東西,如：glasses (眼鏡) trousers,clothes
若表達具體數(shù)目,要借助數(shù)量詞 pair(對,雙); suit(套); a pair of glasses; two pairs of trousers
6） 另外還有一些名詞,其復數(shù)形式有時可表示特別意思,如：goods貨物,waters水域,fishes（各種）魚
a piece of bread[ cake(蛋糕),paper(紙),thread(線),cloth(布),furniture(家具),coal(煤),news(新聞),advice(意見),information(信息),work(工作),meat(肉) ] 一塊面包[ 一塊蛋糕、一張紙、一根線、…… ] an item of information 一則情報 a burst of applause 一陣掌聲 a fit of anger 一頓脾氣 a slip of paper 一張紙條 a length of cloth 一段布料 a cake of soap 一塊肥皂 a tube of tooth-paste 一條牙膏 a bottle of ink 一瓶墨水 它在句子中作主語時,句子的謂語也只用單數(shù)形式.例如：Water is a liquid .水是液體.Wealth doesn't mean happiness .富有并不意味幸福.常見的物質(zhì)名詞,如:snow(雪),rain(雨),water(水),coffee(咖啡),tea(茶),meat (肉),milk(牛奶),rice(米飯),bread(面包),orange (桔汁)等;抽象名詞是指表示動作、狀態(tài)、品質(zhì)、感情等抽象概念的詞,常見的抽象名詞,如:work(工作),study(學習),love(愛),friendship (友誼)等.
最常見的不可數(shù)名詞有：advice,baggage,change(零錢),furniture（家具）,hair,homework,information,knowledge,luggage（行李）,money,news,progress,traffic
其它不可數(shù)名詞還有：absence,age,anger,courage,energy,equipment,experience,failure,fear,food,fun,health,ice,industry,kindness,labour,luck,marriage,music,nature,paper,peace,pleasure,power,pride,rain,research,respect,safety,salt,sand,silence,sleep,strength,snow,technology,time,trade,transport,travel,trust,truth,waste,water,wealth,weather,wind,world