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1、动词第三人称单数形式构成规则及练习题动词第三人称单数形式构成规则1、大多数动词在词尾加“S”在清辅音后发音为s，在浊辅音及元音后发音为 z。如： stopstops s ; makemakes s readreads z ; playplays z2、以辅音字母加“y”结尾的，要先将“y”变为“i”，然后在加“es”读iz 如：flyflies z； carrycarries z studystudies z; worryworries3、以“s, x, ch, sh”结尾的，在词尾加“es”，发音为iz 如： teachteaches iz; watchwatches iz4、以“o”结尾的
2、动词，加“es”，读z 如： gogoes z dodoes z下面几个动词变为单数时，原词的元音部分的发音发生了较大的变化，请注意记忆。 如：1、do du:does dz 2、say seisays sez以不发音字母“e”结尾的开音节词，如果尾音是s，z时，加“s”后字母“e”发音， 与所加“s”一起读做iz。 如： closecloses izbe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.注意： 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。含have和has的肯定句变否
3、定句和疑问句。并做出肯定回答和否定回答I have an apple.I dont have an apple.(否定句在have前加not)Do you have an apple? (疑问句用do提问，句首第一个字母大写，句尾加问号)Yes, I do./ No, I dont.（用do和dont回答，）He has a big nose.He doesnt have a big nose.(否定句在has前加doesnt ,并把has变成have) Does he have a big nose?(疑问句用does提问，并把has变成have)Yes , he does./ No, he
4、 doesnt.(用does和doesnt回答)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。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
5、, at, on Sunday 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：
6、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, Im 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+ dont( doesnt ) +动词原形(+其它)。如： I dont like bread. b 当主语为第三人称单数时，要用doesnt构成否定句。如： He doesnt often play. c 一般疑问句：Do( Does ) +主语+动词原形+其
7、它。如：- 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。如： - Does she go to work by bike? - Yes, she does. / No, she doesnt.【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 ha
8、s 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： Han Mei looks like her mother. 韩梅看起来像她的母亲。 Beijing is in China. 北京在中国。 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，是第三人称单数。如： A horse is a useful animal. 马是有用的动物。 This book is yours.
9、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,everyone,everything, something等及指示代词this,that作主语时，是第三人称单数。如： Everyone is here. 大家到齐了。 This is a pen. 这是一支钢笔。 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。如： The milk is in the glass. 牛奶在玻璃杯里。 The bread is very small. 那面包很小。
10、六、当数字或字母作主语时，看作第三人称单数。如： 6 is a lucky number. 6是个吉利数字。I is a letter. I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_enjoy_have_wish_play_uie_ teach_buy_ study_drink_ go_ stay_make_look_carry_come_watch_plant_ fly_二、用括号内动词的适当形式填空。1. He often
11、 _(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. Sh
12、e 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. Im staying in bed.16. She _(go) to school from Monday
13、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 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
14、.(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
15、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 dont do her homework on Sundays. _I like apples. Tom is my best friend. He likes apples, too . My mother lik
16、es grapes, but my father likes strawberries. 一般现在时中含有实义动词的句子变否定句和疑问句，并根据疑问句做出肯定回答和否定回答。1主语是非第三人称单数（第一人称，第二人称及复数人称）I like apples.I dont like apples.(否定句在实义动词前面加dont)变否定句练习题We speak Chinese. They come from Canada. Jane and Sally like English a lot. Do you like apples?(疑问句用do提问，句尾加问号)变疑问句练习题We speak Ch
17、inese. They come from Canada. Jane and Sally like English a lot. Yes,I do./No, I dont.（肯定回答用do.否定回答用dont）对变成疑问句的练习题做出肯定回答和否定回答We speak Chinese. They come from Canada. Jane and Sally like English a lot. 2主语是第三人称单数（主语是he,she,it和所有能被它们代替的单个人称）He likes apples.（第三人称做主语，动词要加s.详情看变化规律）He doesnt like apples
18、.（否定句在实义动词前加doesnt,并把实义动词变成原型。）变否定句练习题She speaks Chinese. The boy comes from Canada. Jane likes English a lot. Does he like apples?（疑问句用does提问，把实义动词变成原型）变疑问句练习题She speaks Chinese. The boy comes from Canada. Jane likes English a lot. Yes, he does./No, he doesnt.(肯定回答用does,否定回答用doesnt)对上面变成疑问句的句子做出肯定回答和否定回答She speaks Chinese. The boy comes from Canada. Jane likes English a lot.