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1、第三人称单数形式重难点解析动词原形变第三人称单数的规则与发音规律同名词单数变复数大致相同，请认真观察。 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 sreadreads z ; playplays 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 如：flyflies z； carrycarries zstudystudies z; worryworries 3、以“s, x, ch, sh”结尾的，在词尾加“es”，发音为iz 如：teachteaches iz; watchw
2、atches iz4、以“o”结尾的动词，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 dz2、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. 除上述规律外，还应注意下面三点：1. 动词 have ，遇到主语是第三人称单数时，要用 has；
3、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 every day? 一般现在时中的第三人称单数形式: 在一般现
4、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, at, on Sunday uauslly often,never,hardly
5、.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。
6、 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+其它。如：- Do you often play football?- Yes, I do. /
7、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 has lunch at twelve. 她十二点吃午餐。It looks like a cat. 它看起来像只
8、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. 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。
9、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：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。六、当数字或字母
10、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-sits guess-guesses die-diesgo-goesrush-rushesreach-reachestouch-touchesbrush- brushesenjoyshave-haswish-wishesplay-playstie-tiesteach-teachesbuy-buysstudy-studiesdrink-drinksgo-goesstay-staysmake-makeslook-l
11、ooksenjoy-enjoyscome-comeswatch-watchesplant-plantscome -comesdo-doeslive-lives二、用括号内动词的适当形式填空。1. He often has (have) dinner at home.2. Daniel and Tommy are (be) in Class One.3. We dont watch (not watch) TV on Monday.4. Nick doesnt go (not go) to the zoo on Sunday.5. Do they like (like) the World Cu
12、p?6. What do they often do (do) on Saturdays?7. Do your parents read (read) newspapers every day?8. The girl teaches (teach) us English on Sundays.9. She and I take (take) a walk together every evening.10. There is (be) some water in the bottle.11. Mike likes (like) cooking.12. They have (have) the
13、same hobby.13. My aunt looks (look) after her baby carefully.14. You always do (do) your homework well.15. I am (be) ill. Im staying in bed.16. She goes (go) to school from Monday to Friday.17. Liu Tao does (do) not like PE.18. The child often watches (watch) TV in the evening.19. Su Hai and Su Yang have (have) eight lessons this term.20. What day is (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)Daniel doesnt watch TV every evening.2. I do my homework every day.(改为一般疑问句，作否定
