科普版英语小学五年级上lesson3课件

1、A computer has a keyboard,Lesson 3,hand,eye,/hnd/,/ai/,mouth,/mau/,ear,/i/,/kmpju:t/,computer,keyboard,mouse,/ki:b:d/,/maus/,screen/skrin/,Lets learn A computer has a screen.肯定句 Does a computer have a screen?一般疑问句 Yes, it does.肯定答语 A computer has a mouse. Does a computer have a mouse? Yes,it does. A

2、 computer has a keyboard. Does a computer have a keyboard？ Yes,it does.,A TV has a screen. Does a TV have a screen? Yes,it does. A TV doest have a mouse. Does a TV have a mouse? No,it doesnt. A TV doest have a keyboard. Does a TV have a keyboard? No,it doesnt.,否定句,一般疑问句,否定回答,课 文,Oh！You have a nice T

3、V. 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

4、 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)

5、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

6、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

7、: 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

8、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

9、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。 你有两只眼睛吗？ 是的, 我有。 Do you