1、1. 动词 have ，遇到主语是第三人称单数时，要用 has； 动词 be 的第三人称单数形式是is。2. 含有动词第三人称单数形式的句子变否定句时，要用 doesnt + 动词原形，如：He goes to school at six in the morning. （变否定句） He doesnt go to school at six in the morning.3. 对含有动词第三人称单数形式的句子提问时，要用助动词 does，如：She goes home at five every day. （对划线部分提问） When / What time does she go home
2、 every day?一般现在时中的第三人称单数形式在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-es。I 什么是一般现在时？一般现在时的基本用法有哪些呢？【No. 1】一般现在时的功能1.表示事物或人物的特征、状态。The sky is blue.天空是蓝色的。2.表示经常性或习惯性的动作。I get up at six every day.我每天六点起床。【No. 2】一般现在时的构成1. be动词：主语+be（am,is,are）+其它。I am a boy.我是一个男孩。2.行为动词：主语+行为动词（+其它）。We study Engl
3、ish.我们学习英语。当主语为第三人称单数（he, she,it）时，要在动词后加-s或-es。Mary likes Chinese.玛丽喜欢汉语。 【No. 3】一般现在时的变化 1. be动词的变化。a 否定句：主语+ be + not +其它.如：He is not a worker.他不是工人。 b 一般疑问句：Be +主语+其它。-Are you a student? -Yes. I am. / No, Im not. c 特殊疑问句：疑问词+一般疑问句。Where is my bike? 2.行为动词的变化。主语+ dont（ doesnt ） +动词原形（+其它）。 I dont
4、 like bread. b 当主语为第三人称单数时，要用doesnt构成否定句。 He doesnt often play.c 一般疑问句：Do（ Does ） +主语+动词原形+其它。- Do you often play football? - Yes, I do. / No, I dont. 当主语为第三人称单数时，要用does构成一般疑问句。 - Does she go to work by bike? - Yes, she does. / No, she doesn【No. 4】特殊疑问句：How does your father go to work?II 哪些主语是第三人称单数
5、? 现归纳总结如下：一、人称代词he, she, it是第三人称单数。 He likes watching TV. 他喜欢看电视。 he 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。 Han Mei looks like her mother. 梅看起来像她的母亲。 Beijing is in China. 在中国。 Uncle 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
6、三人称单数。 A horse is a useful animal. 马是有用的动物。 This book is yours. 这本书是你的。 That car is red. 那辆小汽车是红色的。 The cat is Lucys. 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。 Everyone is here. 大家到齐了。There is something wrong with the watch. 这块手表有毛病。This is a pen. 这是
7、一支钢笔。That 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。 The milk is in the glass. 牛奶在玻璃杯里。 The 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。 6 is a lucky number. 是个吉利数字。 I is a letter. 是个字母。巩固练习题：I 写出下列动词的第三人称单数形式： sit- guess- die-go- rush- reach-touch-brush- fly- copy- say-run- do-fix-live-cry- enj
8、oy-have-wish-play- Tie-teach-buy- study- drink- go-stay-make-look- carry-come-watch- plant-fly -二、用括号动词的适当形式填空。1. He often _（have） dinner at home.2. Daniel and Tommy _（be） in Class One.3. We _（not watch） TV on Monday.4. Nick _（not go） to the zoo on Sunday.5. _ they _（like） the World Cup?6. What _the
9、y often _（do） on Saturdays?7. _ your parents _（read） newspapers every day?8. The girl _（teach） us English on Sundays.9. She and I _（take） a walk together every evening.10. There _（be） some water in the bottle.11. Mike _（like） cooking.12. They _（have） the same hobby.13. My aunt _（look） after her baby
10、 carefully.14. You always _（do） your homework well.15. I _（be） ill. Im staying in bed.16. She _（go） to school from Monday to Friday.17. Liu Tao _（do） not like PE.18. The child often _（watch） TV in the evening.19. Su Hai and Su Yang _（have） eight lessons this term.20. What day _（be） it today? Its Sat
11、urday.三、按照要求改写句子1. Daniel watches TV every evening.（改为否定句）_2. I do my homework every day.（改为一般疑问句，作否定回答）_3. She likes milk.（改为一般疑问句，作肯定回答）_4. Amy likes playing computer games.（改为一般疑问句，作否定回答）5. We go to school every morning.（改为否定句）_6. He speaks English very well.（改为否定句）7. I like taking photos in the
12、park.（对划线部分提问）8. John comes from Canada.（对划线部分提问）9. She is always a good student.（改为一般疑问句，作否定回答）10. Simon and Daniel like going skating.（改为否定句）11.Jim does his homework every day. （改为否定句）四、改错（划出错误的地方，将正确的写在横线上）1. Is your brother speak English? _2. Does he likes going fishing?3. He likes play games af
13、ter class. _4. Mr. Wu teachs us English. _5. She dont do her homework on Sundays. _II选择1. Ben _a new book. A. have B. has C. haves D .were2. Ben and Mary some books. A. have B. has C. are D .were3. I some stories every day. A. have B .has C .are D .were4. I _ ice cream.A .like B.likes C. liking D.li
14、kees5.I every dayA.swim B.swims C.swiming D.swimes6.He his homework every day.A.does B.do C.are D.is7. I _ my homework every day.A.do B.is C.does D.are8.They _ their homework every day.A. do B.does C. is D.are9.My English teacher always _ to us. A.smelling B.smells C.smell D.is smell10.Lucy_with her
15、 hands.A.touch B .touching C .touches D.touchs11.Superdog_the boysA.see B.sees C.seeing D.ses12.Supergirl and Superdog _ them.A.saves B.save C.saving D.is saving13.Jack_their cow.A.sells B.sell C.selling D.are selling14.Jack_up the beanstalk.A.gets B.get C.climb D.climbs15.The giant（巨兽）_boys.A.eatin
16、g B.dont eat C.eats D.eat16.The goose（鹅）_golden eggs.A.lay B.lays C.layed D.layes17.The woman _the beanstalk.（豆秸）A.cut B.cutting C.are cut D.cuts18.Her mother _the beanstalk（豆秸）.A .take B .is take C. takes D. taking19 Jack and her mother _ Blogger.（博客）A. does B.are C.is D. have20.He_the beans（豆） in the ground.A.buy B.puts C.put D.buys
