名词单数变多复数规则
一规则变化:
1.一般名词变复数在后面加上“s”,如map→maps, bag→bags等;
2.以s  sh  ch  x结尾的词加es如:bus→buses, watch→watches等;
三国名言
3.以o 结尾的名词变复数:
A加s的名词有:photo→photos  piano→pianos  radio→radios  zoo→zoos
B 加es的名词有: tomato→tomatoes ,potato→potatoes, hero-> heroes
4.以辅音字母+y结尾变y为i加es,如baby→babies等;
以元音字母+ y结尾的名词直接加s: monkey→monkeys, holiday→holidays,
5.以f或fe结尾的名词变复数时:
A 加s的名词有: belief→beliefs roof→roofs  safe→safes gulf→gulfs
B 去掉f, fe 加ves:  half→halves knife→knives leaf→leaves wolf→wolves
二 不规则变化:常见child-> children  foot-> feet  tooth-> teeth  man->men woman-> womemouse —mice老鼠  
三 单复数同形
fish鱼 deer鹿,sheep绵羊 works 工厂 means手段 Swiss瑞士人 Chinese Japanese
只有复数形式的名词
trousers裤子,pants裤子,shorts短裤 glasses眼镜,compasses圆规,scales天平,pliers钳子,clips剪子 
某国人 的复数有三种类型:
(1)Chinese, Japanese, Swiss 三国人单数复数同形,不需加s;
(2)Englishman, Frenchman, Dutchman复数要把 man 变为men;
(3)其他各国人以–an, -ian收尾的均直接加s。如:Americans, Australians, Indians等。
练习题
pen            bag            apple             banana          orange        oranges            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)
写出下列名词的复数形式
实践单位评价
1orange                  2class                 3text                4monkey                5piano              
6child                   7shelf                8bed                 9country                
10family               11toy               12foot             13Japanese         14radio            15photo         
16army             17tomato         18fox                19woman              20knife              22sheep            
 <>、选择填空
  1There         on the wall .They are very beautiful.A. are photoes      B. are photosC. is a photo        D. is photos
  2.  This kind of car      made in  Shanghai.    A.  is  B .are  C .were  D .has
  3.  There are four      and two胎儿什么时候入盆          in the group.  A. Japanese, Germen    B Japaneses, Germen
                                        C. Japanese,German    C.Japanese, Germans
  4. That’a          art  book.    A. an  B. a  C. the  D are
  5. The boys have got        already.     A.  two bread    B.  two breads  C.  two pieces of bread  D.  two piece of bread
  6. The old man wants          A.  six boxes of apples  B.  six boxes of apple    C. six box of apples    D six boxs of apples
  7. There      some      in the river.    A. is ,fish  B. are, fishs      C. is, fishs  D. are ,fish
  8. There    two    in  the box.    A. is watch  B. are watches    C. are watch D. is watches
  9. We should clean      静静的河 twice a day.    A .our tooth  B. our tooths    C.teeth D.our teeth
  10.The _____ meeting room is near the reading room.    A.teacher  B.teacher’s  C.teachers’  D.teachers
  11. In Britain _____ are all painted red.    A.letter boxes  B.letters boxes    C.letter box  D.letters box
2.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)
1 写出下列名词的复数形式。
1bag _______            2orange _______          3family _______ 
4wish _______            5shelf _______            6knife _______ 
7key _______            8baby _______            9tooth _______ 
10foot _______          11woman _______          12sheep _______ 
13元素周期表51号Japanese _______      14potato _______        15radio _______ 
渺视16child _______          17fish _______          18photo _______ 
19Frenchman _______    20man doctor _______    21.watch _______ 
22.  bus _______          23. sheep _______          24. foot _______ 
 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.  They are______.    A . woman teachers      B. women teachers  C. women teacher    D. woman teacher
4.  Would you like ___ ,please? A. two glass of  water  B. two glasses of  water  C. two glass of waters 
5.  Most of ____ live in ____.A. Germans, German B. German, Germen  C. Germen, Germany D. Germans, Germany