《lesson3acomputerhasakeyboard课件》小学英语科普2011课标版三年级起点五年级上册课件_3

科普版英语小学五年级上册 Lesson 2,大岗中心小学 张阿琴,A computer has a keyboard,Lesson 2,教学目标,学习身体器官,会简单描述一件东西,初步掌握单三形式,动词单三变疑问句,教学重难点,字母组合ou和al的发音：au mouth tall hand write letter clever等四会词的掌握； has的用法，以及陈述句、否定句、 一般疑问句三者之间的转换。 1.New words:mouth,tall,hand,write,letter,clever 2.Key sentence:Does a computer have a keyboard? 在此键入您自己的内容,/kmpju:t/,computer,keyboard,mouse,/ki:b:d/,/maus/,nose,hand,eye,/hnd/,/ai/,/nuz/,foot,/fut/,mouth,/mau/,ear,/i/,He can swim.,He has two legs.,He has a long mouth.,He is an animal.,What is it?,duck/dk/,letter /let/ 信 write a letter write letters be called /k:ld/ 叫做 E-mail /i:meil/ 电子邮件 clever /klev/ 聪明的 catch /kt/ 捉，抓 does /dz/ do的第三人称单数,He is tall.,He has four legs.,He has a long neck(脖子).,He is an animal.,What is it?,giraffe/dirf/,课 文,Oh, You have a nice TV. No, its not a TV. Its a computer. But it looks like a TV. Yes. But a computer has a keyboard.,哦, 你有一台不错的 电视。 不, 它不是电视。它 是一台电脑。 但是它看起来像电视。 是的。但是电脑有一 个键盘。,Whats that? Its a mouse. Does a TV have a mouse, too? No, it doesnt. Where is the mouse? Let me catch it. Look! Here it is.,那是什么？ 是鼠标。 电视机也有一个鼠标 吗？ 不, 它没有。 老鼠在哪? 让我来抓它。 看! 它在这。,look like 看起来像,A look(s) like B. A看起来像B。 鼠标看起来像一只老鼠。 A mouse looks like a mouse. 电脑看起来像一台电视。 A computer looks like a TV.,动词单三,1. 什么是动词单三形式? 2. 哪些词才有单三形式? 3. 什么时候用单三形式? 答: 1. 就是当一般是句子开头的人/物是第三人称、单数(两个条件必须同时满足)时，动词(表示动作的词)必须要用第三人称单数形式, 即常在动词后加-s或-es. 2. be(am, is, are)动词和表示动作的词即动词, 如: run跑, have吃、喝、有, like喜欢,meet遇见, swim游泳都是动词。只有动词才有单三形式。 3. 判断动词用不用单三形式, 我们主要看句子开头的人/物。当人/物不是我I, 你you, 复数, 都可以看成是第三人称单数。这时be动词只能用is, 动词要变成单三形式。判断对人称最关键。,动词单三变化规则,1. 一般在动词之后直接加s,在清辅音后发音为s, 在浊辅音及元音后发音为 z 例如: stopstops s; makemakes s readreads z; playplays z 2. 以sh/ch/s/x结尾的词+es, 发音为iz 例如: teachteaches iz; watchwatches iz 3. 以辅音字母+y结尾的, 把y变成i, +es,读作iz,例如: studystudies buy-buys 4. 辅音字母+o结尾的+es, 读作z 例如: gogoes z dodoes z 下面几个动词变成单三形式时, 原词的元音部分的发音发生了较大的变化, 请注意发音。如: 1、do du: 做does dz 2、say sei 说,讲says sez 3、have hvhas hz,动词单三句如何变疑问句,He a book,has,Does,have,肯定回答: Yes, 第三人称单数 does. 否定回答: No, 第三人称单数 doesnt. 例如: Does she have a sister? 肯定回答: Yes, she does. 否定回答: No, she doesnt.,对问句的回答:,背,变疑问句步骤: 1. 首先看句子中有没有be动词(am, is, are)若有, 变否定直接在be动词后加not, 变疑问直接把be动词提前(第一人称的词都要变为第二人称的词I变you, we变you, my变your, our变your)。 2. 若句子中没有be动词, 看句子中有没有can, 若有, 变否定直接在can后加not, 变疑问直接把can提前。 3. 若句子中既没有be动词也没有can, 找实意动词。变一般疑问句分两种情况, 是单三人称的, 变疑问在句子开头加Does, 并把动词单三变原形(前面打死does后面去死s), 不是单三人称的，变疑问，直接在句子开头加Do 就行了。,练习:变疑问句,1. He likes dogs. 2. I love my cat. 3. We have a ruler. 4. He has an egg. 5. They have five cats. 6. Qiqi has a football. 7. She has two pencils. 8. I am a teacher.,Does he like dogs? Do you like your cat? Do you have a ruler? Does he have an egg? Do they have five cats? Does Qiqi have a football? Does she have two pencils? Are you a teacher?,练习:变否定句,1. His name is Tom. His name is not Tom. 2. We like football. We dont like football. 3. You have a computer. You dont have a computer. 4. They have a keyboard. They dont have a keyboard. 5. My parents have a car. My parents dont have a car.,作 业,1. 动词单三变化规则要求会背, 例子要求会默写。 2. 小小翻译家。 你有两只眼睛