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。
（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。
: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：①A 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：①Everyone 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：①The milk is in the glass. 牛奶在玻璃杯里。
②The 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. "I"是个字母。
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doesn't + 动词原形，如：He goes to school at six in the morning. (变否定句)→He doesn't 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）含有动词第三人称单数形式的句子变否定句和疑问时怎样变【注意：】只要句子中出现do, does,don’t,doesn’t, 句子中原来的实意动词要用原形例如：He likes apples. (改成否定句)He doesn’t likes apples。
(错)He doesn’t like apples。
(对)A 否定句：（1）当主语是第一，二或复数时，主语+ don't +动词原形(+其它)。
如：I don't like bread.\（2）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.B 一般疑问句：（1）当主语是第一，二或复数时，Do +主语+动词原形+其它。
如：Do you often play football- Yes, I do. / No, I don't.(2) 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.、C特殊疑问句：疑问词+一般疑问句。
如：How does your father go to work（四）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：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] 如：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”如：close－closes [iz]6、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。
（五）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. 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、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. _________________练习题练习一、写出下列动词的第三人称单数drink____go_____stay____make____look___have____pass____carry____come____ watch_____plant_____fly____study____brush___do____teach____meet______ bring___]练习二、将括号里动词的适当形式填入横线上。
1. I ________ in the corridors. (walk)2. He _________ in the corridors. (run)3. She ___________ her face once a day. (wash)4. They ____________ their teeth once a day. (brush)5. You ___________ up your clothes once a day. (hang)6. We ____________ our home work once a day. (finish)7. He ____________ rubbish in the classroom. (throw)】8. She _____________ rubbish on the floor. (throw)9. I _____________ rubbish in the bin. (throw)10. They ___________ the table once a day. (set)11. Peter never _________ in the corridors. (run)12. Mary usually _________ the table. (set)13. Pat and Ken _________ the plants in the morning. (water)14. The boy __________ his hair once a day. (comb)15. Miss Cheng _________ TV at home. (watch)/16. My sister __________ his schoolbag once a day. (pack)17. My mother _________ dinner for me. (cook)18. My parents _________ the house at Chinese New Year. (clean)19. My teachers _________ us some gifts. (give)20. My friends _________ the table with me. (set)练习三、选择正确的单词填到括号里。