1、一一.第三人称单数第三人称单数形式的词尾变化形式的词尾变化.在一般现在时中在一般现在时中,当当主主语语是第三人称单数形是第三人称单数形式时式时,行为动词行为动词用第三用第三人称单数形式人称单数形式,即加即加-s 或或 es.具体方法如具体方法如下下:1.一般情况下一般情况下,直接加直接加 -s.如如:work-works play-plays rain-rains see-sees2.以以 sh,ch,s,x或或o结尾结尾的词后加的词后加-es.如如:wash-washes teach-teaches fix-fixes do-does go-goes3.以辅音字母加以辅音字母加-y结尾结尾的
2、的,先把先把y变成变成i,再加再加-es.如如:study-studies fly-flies carry-carries动词短语：动词短语：+s:Plays,skips,sings,gives,starts,likes,buys some toys,gets up comes back home makes noodles,eats lunch drinks coffee begins his class,practises the piano+es:watches TV brushes his teeth goes to bed goes to school does my homewor
3、k does some readingy i+es:fly flies study studies 不规则变化：不规则变化：have-has 思考：什么时候用动词的原型？什么时候用动词的三单形式？观察下列图片，并得出结论。The girl eats apples.The two boys eat apples.Mike plays basketball.The boys play basketball.lXiao mei goes to school.The sisters go to school.Ming ming watches TV.Tim and his mother watch T
4、V.Mary goes shopping.Her friends go shopping.Jane reads books.The students read books.二二.哪些主语哪些主语是第三人称单是第三人称单数数1.人称代词人称代词he,she,it是第三人称是第三人称单数单数.1).He likes watching TV.他喜欢看电视他喜欢看电视.2).She has lunch at twelve.他十二点吃午餐他十二点吃午餐.3).It looks like a cat.它看起来象只猫它看起来象只猫.2.单个人名单个人名.地名或称呼作主语时地名或称呼作主语时,是第三人称单数形
5、式是第三人称单数形式.如如:1).Han Mei watches TV with her mother.韩梅和她的母亲看电韩梅和她的母亲看电视视.2).Beijing is in China.北京在中北京在中国国.3).Miss Wu often makes cakes.王叔叔经常做蛋糕王叔叔经常做蛋糕.3.单数可数名词或单数可数名词或“this/that/the+单数可数名词单数可数名词”作主语时作主语时,是第三人称单数是第三人称单数.如如:1).This girl plays football in school.2).This book is yours.3).That car is r
6、ed.4).The cat is Lucys.5.不可数名词作主语时不可数名词作主语时,为第三人称单数为第三人称单数.如如:1).The milk is in the glass.牛奶在玻璃杯里牛奶在玻璃杯里.2).The bread is very small.那块面包很小那块面包很小.6.当数字或字母做主语当数字或字母做主语时时,看做第三人称单数看做第三人称单数.如如:1).“6”is a lucky number.“6”是个吉利数字是个吉利数字.2).“I”is a letter.“I”是个字母是个字母.专项习题精练专项习题精练(着眼高分着眼高分 查漏补查漏补缺缺)用括号中所给动词用括号
7、中所给动词的适当形式填空的适当形式填空 1.He often _(have)dinner at home.2.Daniel and Tommy _(be)in Class One.3.We _(watch)TV on Monday.4.Nick _(go)to the zoo on Sunday.5.Mike _(like)cooking.6.They _(have)the same hobby.7.My aunt _(look)after her baby carefully.8.You always _(do)your homework well.9.I _(be)ill.Im stayi
8、ng in bed.10.She _(go)to school from Monday to Friday.11.Danny _(study)English,Chinese,math,science and art at school.12.Mike sometimes _(go)to the park with his sister.13.My father always _(come)back(回来)from work very late.14.The teacher is busy.He _(sleep睡觉)six hours a day.15.Joan _(sing唱歌)in the
9、classroom every day.She often _(sing)there.一般现在时一般现在时结构：结构：主语主语(I,we,you,they,the girls)主语主语(he,she,it,Tom,the boy)+动词原形动词原形(go,play,talk)+动词三单动词三单(goes,plays,talks)定义：定义：表示表示经常性经常性或或习惯性习惯性的动作。的动作。怎么改一般疑问句：一找be动和情态，二找主语你、我、他，找到了，恭喜你，把他们句首安个家，be动、情态要在前，紧跟主语你、我、他，注意要把some换any。找不到be动和情态，do会在句首笑你傻，主语三单就
10、打死（does）它，别忘了还有过去式是did.检查完拼写就搞定啦！怎么改否定句的顺口溜 先找be动和情态，再把not后面带，找不到也别急，实意动词圈出来，dont、doesnt、didint当帽戴，还得小心被some害，改成any，才算完.一般现在时一般现在时结构：结构：肯定句：肯定句：（复数）主语（复数）主语+动词原形动词原形+其其他他一般疑问句一般疑问句：Do+（复数）主语（复数）主语+动词原形动词原形+其他？其他？否定句否定句：（复数）：（复数）主语主语+dont +动词原形动词原形+其其他他肯肯/否回答否回答：Yes,主语主语+do.No,No,主语主语+dont.+dont.特殊疑问
11、句：特殊疑问词特殊疑问句：特殊疑问词+do/does+主语主语+动词原形动词原形 结构：结构：肯定句：（单数）主语+动词三单+其他 否定句：（单数）主语+doesnt+动词原形+其他 一般疑问句：Does+主语+动词原形+其他？肯/否回答：Yes,主语+does.No,主语+doesnt.1.I speak English.2.We like Math.3.They go swimming on Sundays.将下列句子改成否定句，一般疑问句并回答：将下列句子改成否定句，一般疑问句并回答：I dont speak English.Do you speak English?Yes,I do/N
12、o,I dont.We don t like Moths.Do you like moths?Yes,we do/No,we dont.They dont go swimming on Sundays.Do they go swimming on Sundays?Yes,they do./No,they dont.一般疑问句，肯定回答，否定回答.Simon and Daniel like going skating.My parents watch TV every day.Sun Yang and Sun Fang usually wash clothes on Saturdays.Her
13、classmates play football in school.一般疑问句，肯定回答，否定回答.She likes milk.He speaks English very well.John comes from Canada.Amy likes playing computer games.Gao Shans sister likes playing table tennis.My dog runs fast.Mingming usually waters the flowers every day.Tom does his homework at home.Lets correct:
14、1.I goes to school at six every day.2.He dont like playing football.3.They likes playing games.4.Daming watchs TV in the evening.5.Does he usually has a party?6.What do they on Sunday?7.Tony goes always to school at eight oclock.8.What they eat in the party?9.Lily haves lunch at school.10.What do hi
15、s parents usually gives him?_1.I want to buy a big green bag.(变特殊疑问句变特殊疑问句)_ _ you want to buy？2.Mary does not have any books.(变肯定句变肯定句)Mary _ _ books.3.She likes the black bag.(变为否定句变为否定句)She doesnt like the black bag.What dohas some4.I buy the pants for only 50 Yuan.(用用she改写句子改写句子)_ _ the pants for only 50 Yuan.She buys5.He often has hamburgers and apples for dinner.(变为一般疑问句变为一般疑问句)He doesnt often have hamburgers and apples for dinner.
