英语名词变复数

名词变复数的规则：
1．一般名词复数是在名词后面加上“s”,如map→maps,
bag→bags等；
2．以s,
sh,
ch,
x等结尾的词加“es”,如bus→buses,
watch→watches等；
3．以辅音字母＋y结尾的词,变y为i加es,如baby→babies等；以元音字母＋
y结尾的名词变复数时,直接加s变复数,如monkey→monkeys,
holiday→holidays,
storey→storeys（楼层）；
4．以o
结尾的名词变复数时：
a）加s的名词有：photo→photos
,piano→pianos,
radio→radios,
zoo→zoos
b）加es的名词有：
potato→potatoes
tomato→tomatoes
5．以f或fe结尾的名词变复数时：

1)单数名词加s: students, apples, bags, trees, books, brothers.�

2)以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches.�

3)以辅音字母加y结尾的名词，变y为i加es: cities, babies, enemies.�4)以f或fe结尾的名词，多数变f为v加es: wives, knives.但有些词只加s: roofs, proof s, chiefs.�

5)以o结尾的名词，有些加es: Negroes, heroes, tomatoes, potatoes.其它加s: radio s, zoos, pianos, photos.�

6)不规则名词：foot→feet, goose→geese, tooth→teeth, child→children, man→me n, woman→women, sheep→sheep, deer→deer, mouse→mice.

7)某些外来词变复数：datum→data, medium→media, bacterium→bacteria, curriculum→curricula, criterion→criteria, phenomenon→phenomena. (�um/�on→a)�analysis→analyses, basis→bases, crisis→crises, diagnosis→diagnoses.(�is→es )�

8)复合名词变复数：以不可数名词结尾的复合名词无复数形式，如：homework.�

以man或woman为前缀的复合名词变复数，前后两个名词都变复数，如：manservant→menservants, woman student women students.�

其它复合名词变复数：grown�up→grown�ups, brother�in�law→brothers�in�law, stand�by→stands�by.�

9)复合形容词做定语时，其中的名词保持单数：a six�year�old boy，a two�hundred�page book

【例句】�A second doctor must confirm that these criteria ______ and the death must be re ported to the police department.�

A) has been met

B) have been met�

C) was met

D) was being met�

criteria是复数形式，故A，C，D都为错误选项。正确答案为B。

1) The university authorities are seriously considering abandoning the traditional______class.�

A) fifth minutes

B) fifty�minutes�

C) fifty�minute

D) fifty minute's�

复合形容词用作定语时，其中的名词不变复数，故B不对。A不能做定语，D应为fifty minutes'，正确答案为C。

一般是加S
以S X O等字母结尾的单词加ES
还有少数特殊的 需要特别记忆

一般加S，结尾是sh'ch's'x‘o结尾的词加es.
例：ES的：bus=buses
box=boxes
dish=dishes
watch=watches
S的：boy=boys
horse=horses
page=pages
O的：hero=es
potato=potatoes

torpedo
-
torpedoes,
ratio
-
ratios,
rodeo
-
rodeos,加es,以辅音字母加O结尾的;
portfolio
-
portfolios:
embargo
-
embargoes,只加s,
hero
-
heroes,
veto
-
vetoes
而以元音字母加O结尾的;
例如一般来说,
radio
-
radios