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。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.（一） 什么是一般现在时？一般现在时的基本用法有哪些呢？【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。 3.表示客观现实。如：The earth goes around the sun.地球绕着太阳转。（二）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。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：Tom 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。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。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。PS: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； 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?（三）一般现在时-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： stopstops makemakes readreads playplays 2、以辅音字母加“y”结尾的，要先将“y”变为“i”，然后在加“es”；以元音字母加“y”结尾的，直接加“S” 如： flyflies carrycarries studystudies worryworries3、以“s, x, ch, sh”结尾的，在词尾加“es”，发音为如： teachteaches watchwatches 4、以“o”结尾的动词，加“es”，如： gogoes dodoes 5、以不发音字母“e”结尾的开音节词，加“s” 如： closecloses iz6、特殊：. 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. 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is。（四）巩固练习题：一、 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- tie- teach- buy- study- drink- go- stay- make- look- carry- come- watch- plant- fly - do-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. 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 Saturday三、观察下面两组句子，注意区分do和does,dont和doesnt。I go to school every day. I dont go to school every day.He goes to school every day. He doesnt go to school every day.Do you go to school every day? Yes, I do. (No, I dont) Does he go to school every day? Yes, he does. (No, he doesnt)注：（1）肯定句变否定句，第三人称单数把 does变doesnt （does not），其余把do变dont（do not），后面跟动词原形.（一请一还原）（2）变为一般疑问句,要在句首加do 或does ，这取决于主语是否第三人称单数。课堂练习：把下列句子改成一般疑问句和否定句。1I usually get up at six oclock.（并作肯定回答）2. We usually write e-mails on Saturday evening.（并作否定回答）.3. They have the same hobby.（并作肯定回答）.4.Suhai and Su yang like listening to music after school.（并作否定回答）5.Helen usually watches TV in the evening.（并作肯定回答）1