可数名词有单数（Singular Form）和复数(Plural Form)两种形式。表示一个人或物用单数形式，表示一个以上的人或物用复数形式。
1．一般在词尾加-s。s在浊辅音后面读[z]，在清辅音后面读[s]，在[t]后与[t]一起读[ts]，在[d]后与[d]一起读[dz]。例如：
book — books 书 day — days 天、日 dog — dogs 狗 tree — trees 树
2．以s，sh，ch，x结尾的词在词尾加-es，读[iz]例如： glass — glasses 玻璃杯 watch — watches 手表 box — boxes 盒子 brush — brushes 刷
3．以o结尾的词有些加-es，读[z]；有些加-s，读[s]。例如： tomato — tomatoes 西红柿 potato — potatoes 土豆
photo — photos 相片 radio — radios 收音机 zoo — zoos 动物园
4．以f 或fe 结尾的词，先把f 改为v，再加–es，读[vz]。例如： knife — knives 小刀 leaf — leaves 树叶 life — lives 生命 thief — thieves 小偷
5．以辅音字母加y 结尾的，先把y 改为i，再加-es，读[z]。例如： story — stories 故事 city — cities 城市 family — families 家庭 baby — babies 婴儿
注意：boy — boys 男孩 toy — toys 玩具 key — keys 钥匙
6．有些名词有不规则的复数形式。例如： man — men 男人 woman — women 妇女 tooth — teeth 牙齿 foot — feet 脚
7．有些名词的单复数形式相同。例如；
deer — deer 鹿 sheep — sheep绵羊
Chinese — Chinese 中国人 Japanese — Japanese 日本人
8．有些学科名词虽以s 结尾，但通常都做单数名词看待。例如： physics 物理 maths 数学 politics 政治 news 新闻
9．有些单数形式的名词具有复数的含义，要当作复数看待。例如： people 人们，人民 police 警察 public 公众
选择填空：
1. There are some ________ on the hill.
A. sheeps B. a sheep C. sheep D. sheepes 2. Mr Black often gives us ________ by Email.
A. some good information B. some good informations C. good informations D. a good information
3. There are some new books in the school library. They are ____ books. A. child B. childrens' C. children D. children's 4. I have worn out my shoes, so I want to buy a new ________ . A. pair B. one C. ones D. trousers
5. Meimei's handwriting is better than any other ______ in his class. A. students B. students C. student's D. students' 6. The hospital is a bit far from here. It's about _______ . A. forty minutes's walk B. forty minute's walk C. forty minutes walk D. forty minutes' walk 7. How many _____ are there in your class ?
A. Japanese B. American C. Australian D. Canadian 8. I found my black cat in_____ room.
A. Jim and Mike B. Jim and Mike's C. Jim's and Mike's D. Jim's and Mike
9. How much are the _____ ?
A. bread B. meats. C. potatos D. tomatoes
10. There are many ______ in our school.
A. woman teachers B. woman's teachers C. women teachers D. women's teachers
11. Three months ________ a long time for me. A. is B. are C. have D. has 12. There are ______ and ______ on the table. A. two boxes cake; four bottle of oranges B. two boxes cake; four bottle of orange C. two boxes of cakes; four bottles of orange D. two box of cakes; four bottles of oranges
动词
A） 第三人称单数
当动词是第三人称单数时，动词应该像名词的单数变动词那样加s，如下： 一）一般在词后加s。如：comes, spells, waits, talks, sees, dances, trains 二）在x, sh, ch, s, tch后加es。如：watches, washes, wishes, finishes 三）1）以辅音字母加y结尾的变y为i再加es。如：study-studies, hurry-hurries, try-tries
2）以元音字母加y结尾的直接加s。如：plays, says, stays, enjoys, buys 四）以o结尾加es。如：does, goes 五）特殊的有：are-is, have-has
什么时候用第三人称单数？
一、人称代词he, she, it是第三人称单数。如： He likes watching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午餐。
It looks like a cat. 它看起来像只猫。
二、单个人名、地名或称呼作主语；是第三人称单数。如： ①Han Mei looks like her mother. 韩梅看起来像她的母亲。 ②Beijing is in China. 北京在中国。
③Uncle Wang often makes cakes. 王叔叔经常做蛋糕。
三、单数可数名词或\"this / that / the+单数可数名词\"作主语时，是第三人称单数。如：
①A horse is a useful animal. 马是有用的动物。 ②This book is yours. 这本书是你的。 ③That car is red. 那辆小汽车是红色的。 ④The cat is Lucy's. 这只猫是露茜的。
四、不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，是第三人称单数。如： ①Everyone is here. 大家到齐了。
②There is something wrong with the watch. 这块手表有毛病。 ③This is a pen. 这是一支钢笔。 ④That is an eraser. 那是一块橡皮擦。 五、不可数名词作主语时为第三人称单数。如： ①The milk is in the glass. 牛奶在玻璃杯里。 ②The bread is very small. 那面包很小。
六、当数字或字母作主语时，看作第三人称单数。如： ①\"6\" is a lucky number. \"6\"是个吉利数字。 ②\"I\" is a letter. \"I\"是个字母。
在语言中，第一人称、第二人称、第三人称分别是指“我”、“你”、 “他（她）” 也就是说除了“我”“你”以外，其它的人称都属于第三人称，而这个人称所指的人或物只有一件时就称作第三人称单数！ 那么第三人称，就是指“他”或者“她”。 接下来，什么是“单数”和“复数”呢？
巩固练习题：
I.写出下列动词的相应形式：
1. 第三人称单数： wash_________ match _______guess______ study______ finish_________ go________ snow______ carry_________
2.写出下列动词的过去式：stop______ see________ drive ________let_______ carry______ keep_____ join______ find_______ think________ teach______ catch______
3. 写出下列动词的现在分词形式： stay_______ begin______ forget_______ forget______ lie________ die _______ run_______ prefer______ give________ ring_______ dance______ hope_______ II. 用所给动词的适当形式填空：
1．I ________(write) to you as soon as I _______(get) to London.
2. He doesn’t feel well and ____________(not eat) any food this morning.
3. He ______ not _______(see) me come in, for he ___________(read) something with great interest.
4. I _________(let) you have the book as soon as I _________(finish) it.
5. While we ________(wait) for our teacher, a little boy ________(run) up to us. 6. Don’t make a noise. Grandpa __________(sleep). 7.It’s seven now, Tom’s family__________(watch) TV.
8. It ________(take) me two hours to finish my homework last night.
9. What ______ your mother _______(do) at eight yesterday evening? She _______(wash) clothes.
10. _______ it ______ (rain) when school was over yesterday?
11. What _______(do) _______ tomorrow? We ________ (play) football. 12. There ________ (be) a football match on TV this evening.
13. They said they ________ (visit) the Great Wall the next summer holiday. 14. Who _______ (dance) the best in your class? 15. Will you come if he _____________ (not come)?
16. The teacher told us the earth __________ (move) round the sun.
17. They _______ (have) a party in the garden if it ________ (not rain) tomorrow. 18 She ________ (buy) a sweater yesterday.
19. I don’t know if Mr.Wang ______ (go) to Shanghai tomorrow. If he _____ (go), I ______ (ask) him _______ (take) some books to my daughter, because she _______ (study) there.
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