小学英语动词的单三形式讲解第五次讲义范文

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四年级英语下册第五次讲义一小学英语动词的单三形式讲解大家都知道,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。

但有些同学们对于哪些主语是第三人称单数还不十分清楚,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:① Han Mei looks like her mother. 韩梅看起来像她的母亲。

② Beijing is in China. 北京在中国。

③ 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:① A horse is a useful animal. 马是有用的动物。

② This book is yours. 这本书是你的。

③ That car is red. 那辆小汽车是红色的。

④ The 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:① Everyone is here. 大家到齐了。

② There is something wrong with the watch. 这块手表有毛病。

③ This is a pen. 这是一支钢笔。

④ 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:① The milk is in the glass. 牛奶在玻璃杯里。

② 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:①"6" is a lucky number. "6"是个吉利数字。

②"I" is a letter. "I"是个字母。

第三人称单数形式的构成1.一般直接在词尾加s,如:work-works live-lives make-makes2.以s,x,ch ,sh等结尾的单词加es , 如:miss-misses fix-fixesfinish-finishes teach-teaches3.以辅音字母加y结尾的单词,变y为i加es , 如:fly-flies4.以辅音字母加o结尾的单词,加es 如: go-goes do-does动词单三的练习三写出下列动词的第三人称单数。

go doplay jumpswim runput singdance comeget havefly studyread writelook drinkeat walk一. 根据括号里单词的适当形式填空1. She _____ (be ) a writer.2. It _____(look) like a monkey.3. We_____(go) to the park.4. He _____(go) to school.5. Amy_____(like) eating fruits.6. Hebei_____(be) next to Shandong.7. Our teacher _____(be) talking with John.8. Whose book _____(be) this ?9. Dogs _____(be) our friends .10. That blackboard _____(be) clean.11. The desk _____(be) Tom’s.12. Somebody _____(do) her homework .13. Everybody _____(is ) ok!14. Nobody _____ (be) in the park .15. There _____(be)someone in the classroom .16. That cat _____(be ) mine .17. A little water _____(be) in the cup.18. Cheese _____(taste)well .19. The letter “O” _____(look) like zero.20. “4” _____(be) a bad number in China .二. 把下列句子改成第三人称单数句的肯定句、否定句、一般疑问句,并做回答。

1. I like playing the pinao in the music room . (Tom)2. You need a pencil-box for new term . (Sam’s sister).3.I do my homework at half past four in the afternoon . (she).4. I have breakfast at twenty-five past seven in the morning . (her father ).5. I watch TV at quarter past six with my parents . (Tom’s sister).二小学英语所有句型转换的方法基本助动词只有三个:be, do, have, 他们没有词汇意义,只有语法作用,如协助构成进行体,完成体,被动态,否定句,疑问句等。

一、肯定句改否定句的方法——一步法1、在be动词后加not。

如:is not ,are not ,am not,was not,were not;2、在can,should,will等后加not。

如:cannot,should not,will not;3、上述都没有的,在动词前加助动词否定形式don’t/doesn’t/didn’t。

4、some 改成any。

二、肯定句改一般疑问句的方法——三步法1、把be动词放在句首,剩下的照抄,(some 改成any,my改成your等)句点改成问号。

2、把can,shall,will等放到句首,剩下的照抄,(some 改成any,my 改成your等)句点改成问号。

例如:陈述句: They are in the park. He can play the guitar..一般疑问句: Are they in the park? Can he play the guitar?把下列句子变成一般疑问句1. I am listening to music._______________________________________2. Mike is a student._______________________________________3. Sarah can clean the classroom.________________________________________4. They are in the zoo.________________________________________5. There are some flowers in the vase.________________________________________6.This is my sister._________________________________________7.We are sweeping the floor.__________________________________________3、上述都没有的,在句首请助动词Do/Does/Did帮忙,剩下的照抄,(some 改成any,my改成your等)句点改成问号。

例如:陈述句: I like the ducks. He likes the dogs.一般疑问句:Do you like the ducks? Does he like the dogs?把下列句子改为一般疑问句。

1. We need some masks._________________________________2. They like making the puppet._________________________________3. Su Hai and Su Yang live in a new house._________________________________________________4.I put a book on my head._________________________________________________5. They sing “In the classroom”together._________________________________________________6.We play basketball on Sundays.。