小学英语动词的单三形式讲解第五次讲义.docx
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,在一般如今时中,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非常清晰,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. 他喜爱看电视。 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: 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. 王叔叔常常做蛋糕。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 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: Everyone is here. 大家到齐了。 There is something wrong with the watch. 这块手表有缺点。 This is a pen. 这是一支钢笔。 That is an eraser. 那是一块橡皮擦。五、不行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。 第三人称单数形式的构成1.一般干脆在词尾加 s, 如:work-works live-lives make-makes 2.以s,x,ch ,sh等结尾的单词加 es , 如: miss-misses fix-fixes finish-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 do play jump swim run put sing dance come get have fly study read write look drink eat walk 一. 依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) Toms.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确定句、否认句、一般疑问句,并做答复。1. I like playing the pinao in the music room . (Tom) 2. You need a pencil-box for new term . (Sams 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 . (Toms sister) .二 小学英语全部句型转换的方法根本助动词只有三个:be, do, have, 他们没有词汇意义,只有语法作用,如帮助构成进展体,完成体,被动态,否认句,疑问句等。一、 确定句改否认句的方法一步法 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认形式dont/doesnt/didnt。 4、 some 改成any。 二、 确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帮助,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.