般现在时动词第三人称单数形式构成规则（一般现在时中主语时第三人称1大多数动词在词尾加“S”如：①stop —stops make —makes read —reads play —plays [z]2、以辅音字母加“ y”结尾的，要先将“ y”变为“ i ”，然后在加“ es”读[iz]女口：fly —flies carry —carries study —studies worry —worries3、以“ s, x, ch, sh ”结尾的，在词尾加“ es”，发音为如：teach —teaches watch —watches4、以“ o”结尾的动词，加“ es”，如：go —goes do —does5、以不发音字母“ e”结尾的开音节词，加“s ”女口：close —closes [iz]6、be 动词包括：am，is ，are 。
第三人称单数用is ；过去式为was ；复数用are ，过去式为were.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doesn't + 动词原形，如：He goes to school at six in the morning.（变否定句）He does n't go to schoolat 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 shego home every day?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，原形后加即常在动词-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。
如：The sky is blue. 天空是蓝色的。
2. 表示经常性或习惯性的动作。
如：I get up at six every day. 我每天六点起床。
标志词(时间状语)：always, every week (day, year, month …),once a week,every …,sometimes, at …,on Sun day uauslly often,never,hardly ...................3. 表示客观现实。
如：The earth goes around the sun地球绕着太阳转。
No. 2 】一般现在时的构成1. be 动词：主语+be(am,is,are)+ 其它。
如：I am a boy. 我是一个男孩。
2. 行为动词：主语+行为动词(+其它)。
如：We study English. 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"。
如：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。
如：-Are you a student?-Yes. I am. / No, I'm not.c 特殊疑问句：疑问词+一般疑问句。
如：Where is my bike?2. 行为动词的变化。
a 否定句：主语+ don't( doesn't ) + 动词原形(+ 其它)。
如：I don't like bread.b 当主语为第三人称单数时，要用doesn't 构成否定句。
如：He doesn't often play.c 一般疑问句：Do( Does ) + 主语+ 动词原形+ 其它。
如：- Do you often play football?- Yes, I do. / No, I don't.当主语为第三人称单数时，要用does 构成一般疑问句。
如：- Does she go to work by bike?- Yes, she does. / No, she doesn't.【No. 4 】特殊疑问句：疑问词+一般疑问句。
如：How does your father go to work?II 哪些主语是第三人称单数? 现归纳总结如下：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。
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。
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：① A 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：① Everyone 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：① The milk is in the glass.② 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。
如：① "6" is a lucky number. "6" 是个吉利数字。
②"I" is a letter. T 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-die-rush-touch-fly-say-do-live--enjoy--wish-Tie-buy--牛奶在玻璃杯里。
guess-go-reach-brush-copy-run-fix-cry-have-play--teach--study--drink-- go--stay-- make look-- carry-- come-- watch--plant-- flydo--二、用括号内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 _____ they 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 carefully.14. You always _____ (do) your homework well.15. I _____ (be) ill. I ' m 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?－It ' s Saturday. 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 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）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 after class. ________________4. Mr. Wu teachs us English. ________________5. She don ' t do her homework on Sundays. _________________。