名词单数变复数变化规则：
一．可数名词
1．一般名词复数是在名词后面加上“s”，如map→maps，bag→bags，book-books 等；
2．以s，x，sh，ch结尾的词加“es”，如bus→buses，watch→watches, box-boxes 等；
3．以f或fe结尾的名词变复数时,去掉f，fe 加ves的名词有：half→halves knife →knives leaf→leaves wolf→wolves wife→wives life→lives thief→thieves 4．以o 结尾的名词变复数时：
a）加s的名词有（无生命）：photo→photos ，piano→pianos，radio→radios b）加es的名词有（有生命）：potato→potatoes tomato→tomatoes
5．以辅音字母＋y结尾的词，变y为i加es，如baby→babies, family-families, study-studies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）；
6. oo变ee的单词：foot-feet, goose-geese, tooth-teeth；
7. a变e的单词：man-men, woman-women, policeman-policemen;
8. 复数与原形一致的单词：fish-fish, sheep-sheep, deer-deer, Chinese-Chinese, Japanese-Japanese;
注：1.fish指“鱼肉”时，是不可数名词；2.fish指“鱼的多少”时，是可数名词，但单数和复数同行；There are many fish in the river。
3.fish强调鱼的“种类“时，复数是“fishes”。
There are many kinds of fishes in the river。
9. 有些名词以-s结尾，但表达的是单数意义，例如：news，maths，politics，physics，the United States等。
10. 常以复数形式出现的名词，例如：glasses，trousers，shoes，gloves，socks 等，要表达他们的量时常用pair，例如：a pair of glasses/shoes; 复数只需量词变复数，例如：two pairs of shoes
11. 名词作定语时，不用复数形式，如：a shoe shop。
如果要表示复数，则去掉不定冠词，把名词词组中的最后一个名词变成复数形式，如：an apple tree---apple
trees
例外：man，woman作定语时，如果后面的名词是复数，则man，woman也要跟着变复数。
如：a woman teacher----three women teachers
常见的不可数名词：
Food, meat, fish, chicken, beef, drink, milk, water, homework, news, information, fun, work, Chinese, English, music等
二．名词所有格
（一）表示有生命的名词所有格
1. 在单数名词后加---’s，如：the teacher’ s office
2. 以-s结尾的复数名词后加“’”如：the teachers’ s office
3. 不以-s结尾的名词复数后加“’s”，如：the Children’s Palace
4. 用and连接两个并列的单数名词表示共有时，只需在后一个并列名词词尾加“’s”；如果不是，则需在各个并列名词后分别加“’s”。
如：John and Mary’ s house, John’ s and Mary’ s house
（二）表示无生命的名词所有格
一般用“of +名词”表示，如：the capital of China
（三）双重所有格
将’s与of 结合一起使用构成双重所有格，
例如：
a friend of my father’s 我父亲的一位朋友
a photo of mine 我的一张照片
名词单数变复数的练习题
一、写出下列名词的复数形式
1、orange__________
2、class ___________
3、monkey__________
4、piano___________
5、child ___________
6、shelf ____________
7、bed____________
8、country__________
9、family___________10、toy__________ 11、foot __________ 12、radio__________ 13、photo__________ 14、tomato___________ 15、woman___________16、knife________ 17、sheep__________18、ship__________ 19、dish___________ 20、mouse___________
二、用所给的单词的复数的正确形式填空：
1> There are three_____________(chair) in the classroom.
2> These_____________ (tomato) are red.
3> My brother looks after two_____________ (baby)
4> My father likes to eat_____________ (potato).
5> Chinese_____________ (people)like to eat noodles.
6> I have a lot of _____________ (toy) in my bedroom.
7> My mother wash_____________ (dish) in the kitchen.
8> I have two_____________ (pencil-box).
9> There are some_____________ (bus)in the street.
10> Monster has eight_____________ (foot).
三、选择填空
( )1．I can see three ________ in the zoo.
A. monkeys
B. monkeys
C. monkey ( )2. The pig has four ________.
A. foot
B. feet
C. foots
( )3. My two brothers are ________.
A. policeman
B. policemans
C. policemen ( )4. I can see ten _____ in the picture.
A. sheep
B. dog
C. pig
( )5. The _____ has three_____.
A. boys, watches
B. boy, watch
C. boy, watches ( )6. Can you see _______on the plate?
A. bread
B. breads
C. breades ( )7. The girl often brushes her_____ before she goes to bed.
A. tooth
B. tooths
C. teeth ( )8. Mr. Black often drink some _________.
A. milk
B. milks
kes ( )9. There are some _____on the floor.
A. child
B. man
C. books ( )10. Lucy will has some _______.
A. photo
B. photos
C. photoes ( )11. I am drinking two ________.
A. cups of water
B. cup of water
C. cups of water s。