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我們經常會看到有些名詞變復數時并沒有遵循上述規則。這就是名詞的不規則變化。還有一些名詞，單復數是同一個形式的。不過，我們還是可以通過一些比較，發現其中的一些奧妙。以下我將為大家講講名詞的不規則變化。
一、有些名詞中保存了英語中古舊的復數形式，如：
man-men woman-women
tooth-teeth foot-feet
child-children goose-geese
mouse-mice ox-oxen
二、有些是外來詞，仍保有原來的復數形式，如：
Phenomenon-phenomena（現象）
Formula-formulae（公式）
Thesis-theses（論文）
Basis-bases（基礎）
Analysis-analyses（分析）
Criterion-criteria（標準）
Crisis-crises（危機）
Appendix-appendices（附錄）
三、部分單詞的復數形式不變。
例：fish→fish; sheep→sheep; cattle→cattle; deer→deer; salmon→salmon, means→means
四、compound nouns，這類復數詞是以主要的名詞來表示
例：daughter-in-law→daughters-in-law 媳婦; father-in-law→fathers-in-law岳父
man-of-war→men-of-war兵艦; maid-servant→maid-servants
step-son→step-sons晚子; son-in-law→sons-in-law.
但是，也有些合成名詞，特別是由man和woman構成的合成名詞，里面所含的成分，全都要變為復數，如：
Man-servant－men-servants，woman doctor－women doctors等
五、有些名詞經常是帶著-s詞尾的，但通常都作單數看待，如：
Phonetics（語音學），physics（物理學），optics（光學），politics（政治），news（新聞）等。
六、另一些名詞則以復數詞出現的機會較多
例：bellows風箱; clothes; police; shorts短褲; scissors剪刀; spectacles眼鏡; shears大剪刀，trousers長褲，wages工資，belongings所有物， surroundings環境，savings儲蓄，findings調查結果，arms武器，clothes衣服，stairs樓梯，等
七、另外還有一些名詞，其復數形式有時可表示特別意思，
例：goods貨物，waters水域，fishes（各種）魚，papers文件，證件，greens青菜，manners禮貌，ruins廢墟，troops軍隊，looks外貌，times時代，等
第三部分：不可數名詞的計量方法
�。�1）一般用“數字+of+計量單位+名詞”表示，（注意：當數字大于一時，表示計量單位的名詞可以有復數形式）。如：
a piece of news 一則新聞 a piece of meat 一塊肉 a glass of wine一杯酒 two bowls of rice 兩碗米 a sum of money 一筆錢 five bags of flour 一袋面粉 a drop of water 一滴水 three bottles of milk 三瓶牛奶 two pieces of advice 兩條建議
�。�2）用much/some/ a little/ little/ a lot of/ plenty of+不可數名詞
練習題：
1、 All the people at the conference are ______.
a. mathematic teachers c. mathematics teacher
b. mathematics teachers d. mathematic’s teachers (C)
2、All the ______ in the hospital got a rise last month.
a. women doctors c. woman doctors
b. women doctor d. woman doctor (a)
3、---Are there any ________ on the farm?
---Yes, there are some.
A. horse B. duck C. chicken D. sheep (D)
4、--- They are thirsty. Will you please give them ______ ?
--- Certainly.
A. some bottles of waters B. some bottles of water
C. some bottle of water D. some bottle of waters (B)
5、Mike hurt one of his ______ in the accident yesterday.
A. tooth B. feet C. hand D. ear (B)
6、There is some _______ on the plate.
A. cakes B. meat C. potato D. pears (B)
7、The little baby has two _______ already.
A. tooth B. tooths C. teeth D. teeths (C)
8、We need some more____. Can you go and get some, please?
A. potato B. potatos C. potatoes D. potatoe (C)
9、Please remember to give the horse some tree___.
A. leafs B. leaves C. leaf D. leave (B)
10、He gave us____ on how to keep fit.
A. some advices B. some advice C. an advice D. a advice (B)
11、Please pass me _____.
A. two glass of water B. two glasses of waters
C. two glasses of water D. two glass water (C)
12、There are a lot of _______ down there but hardly any _______.
A. sheeps, people B.sheep, people C. sheeps, peoples D. sheep, peoples (B)
13、This table is made of __________.
A. many glass B. glasses C. some glasses D. glass (D)
14、______ can get a better view of the game than the participants.
A. Looker-on B. Lookers-on C. Looker-ons D. Lookers-ons (B)
15、Some ______ are flying kites near the river.
A. child B. boy C. boys D. childs (C)
16、Mr. Smith always has ________ to tell us.
A. some good pieces of news B. some pieces of good news
C. some good piece of news D. some piece of good news (B)
17、Twelve _______ were hurt, but no _________ were lost in that accident.
A. person; life B. people; lives C. peoples; lives D. persons; life (B)
18、In the view of the foreign experts, there wasn’t ____ oil here.
A. much B. lots of C. a great deal of D. many (A)
19、The police investigated those _____ about the accident.
A. stander-by C. standers-by
B. stander-bys D. standers-bys (B)
20、Generally there are ______ television programs for children on Saturday.
A. little B. much C. a large number of D. a large amount of (C)
名詞的數 2不規則變化