可数名词的单数和复数
可数名词分为单数和复数。

名词单数就是该词本身，在其前面加a或an。

1.单数
如a desk（一张桌子）
an old desk（一张旧书桌）
2.复数：要表示一个以上概念时，要用名词复数形式
规则变化
1）一般情况下加-s
如book--books（书）desk--desks（书桌）
2）以s ,x ,ch , sh结尾加-es
如box--boxes（盒子）bus--buses(公共汽车)
注意①以th 结尾加-s, month--months
②stomach--stomachs
3)以辅音字母+结尾，变y为i再加- es。

如city--cities(城市) country--countries(国家)
注意以元音+y，直接加s。

如：day--days(天)，boy--boys(男孩) 4)以f或fe结尾，复数变f或fe 为v再加-es
如knife-knives(书) , half-halves(一半)
(thief ,wife ,life ,shelf ,knife ,leaf ,self ,half ,wolf)
注意①有少数词后直接加s，如roof-roofs (屋顶)
5)以o结尾
(1)有生命的加-es
如tomato-tomatoes(西红杮)
potato-potatoes(土豆)
(2)无生命的加-s
如piano-pianos (钢琴), zoo-zoos(动物园)
photo-photos (照片), kangaroo-kangaroos(袋鼠)
kilo-kilos(千克)
不规则变化
1)元音字母发变化。

如man--men(男人)，woman--women(妇女)
tooth--teeth(牙齿) ，foot--feet(脚)
mouse--mice(老鼠) ，policeman--policemen(警察)
policewoman--policewomen(女警察)
2)词尾发生变化。

如child--children(小孩) ，ox--oxen(公牛)
3)单、复数形式相同。

如fish--fish(鱼)，sheep--sheep(绵羊)，deer--deer(鹿)，Chinese--Chinese(中国人)，Yuan--Yuan(元)，jinn--jinn(斤)
注意不说an English，要说an Englishman.
①fish作鱼肉讲时不可数，没有复数。

②fishes指各种不同种类鱼或指几条鱼。

4)形似单数，实为复数意义。

如people(人，人们)these people(不说a people，可说a person)
police(公安，警察)ten police(不说a police，可说a policeman)
5)由man和woman构成的合成名词，变复数将名词及man或woman都变成复数。

如a man driver-men drivers(男司机)
a woman doctor-women doctors (女医生)
不可数名词，他们的复数形式就是他们本身。

water(水) milk(牛奶) tea(茶) rice(米饭) orange（橙汁）juice（果汁）bread（面包）不可数名词的数量关系可借助量词表示，如。

a cup of tea two cups of tea
名词复数练习题
1）.填入所给名词的正确形式
1. I have two_____ (knife)
2. There are many _____ here. (box)
3. There are many _____ on the road. (bus)
4. A few _____ are drawing on the wall. (boy)
5. The _____ are playing football now. (child)
2）选择填空
1. They come from different ______
A. country
B. countries
C. a country
D. countrys
2. How many ______ do you see in the picture?
A. tomatos
B. tomatoes
C. tomato
D. the tomato
3. There are some ______ in these _______.
A.knifes…pencil-boxes
B.knives…pencils-box
C.knives…pencil-box
D.knives…pencils-boxes
4. There is no ______ in the plate.
A. apples
B. oranges
C. rice
D. eggs
5. _______ are good for our health.
A. Tomatos
B. Tomatoes
C. Tomato
6. I like to eat cake with ______.
A. cherries
B. cherry
C.cherrys
7. ______ and ______ are not friends.
A. Foxs…wolfs
B. Foxes…wolfs
C. Foxes…wolves
8. Do you want to drink much ?
A、a milk
B、
milk C、milks
9. Do you want some for supper?
A、a potato
B、
potatoes C、potatos
10. In autumn，you can see a lot of on the ground.
A、leaf
B、
leafs C、leaves
11. My sister has two . One is old，the other is new.
A、a watch
B、
watchs C、watches
12.There on the wall .They are very beautiful.
A. are photoes
B. are photos
C. is a photo
D. is photos
13. There two in the box.
A. is watch
B. are watches
C. are watch
D. is watches
3）请用括号中名词的复数形式填空
1． Look at those _______. (child)
2． I can see a __________ standing near the door. (policeman)
3． Do you want some ________ for dinner? (potato)
4． In autumn, you can see a lot of _______ on the ground.(leaf)
5． He has two _______.One is blue , the other is yellow.( box)
6． Two ________ live in this building .( family )
4）选择正确的词形
1． How many (radioes, radios) can you see?
2． There are 36 (boys, boies) in my class.
3． Look at those (sheeps, sheep).
4．I don’t want (a, an) old cup.
5． Give me that (box, boxes), please.
5）将以下单复数句进行转换
1． This is a knife. ______________________________________
2． That is a
tomato. ______________________________________
3． That child is very good._____________________________________
4 . These are mice. ______________________________________ 5． Those are children. ______________________________________
6)写出下列单词的复数
I _________him _________this ___________her ______
watch _______child _______photo ________diary ______
day________ foot________ book_______ dress ________
tooth_______ sheep ______box_______ strawberry _____
thief _______yo-yo ______ peach______ sandwich ______。