Lesson 3《A computer has a keyboard》课件

课件20张PPT。A computer has a keyboardLesson 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词 汇keyboard /'ki:b?:d/ 键盘
mouse /maus/ 老鼠，鼠标
tall /t?:l/ 高的
mouth /mauθ/ 口，嘴
hand /h?nd/ 手
write /rait/ 写
TV / 'ti:’vi: / 电视
every /'evri / 每一个
ear /i? / 耳朵
eye /ai / 眼睛
email /‘i:meil / 电子邮件/k?m'pju:t?/computerkeyboardmouse/'ki:b?:d//maus/nosehandeye/h?nd//ai//n?uz/foot/fut/mouth/mauθ/ear/i?/He can swim.He has two legs.He has a long mouth.He is an animal.What is it?duck/d?k/He is tall.He has four legs.He has a long neck(脖子).He is an animal.What is it?giraffe/d?i'rɑ?f/ 课 文Oh, You have a nice
TV.
No, it’s not a TV. It’s
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。What’s that?
It’s a mouse.
Does a TV have a
mouse, too?
No, it doesn’t.
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: stop－stops [s]; make－makes [s] ②read－reads [z]; play－plays [z]
2. 以sh/ch/s/x结尾的词+es, 发音为[iz]
例如: teach－teaches [iz]; watch－watches [iz]
3. 以辅音字母+y结尾的, 把y变成i, +es,读作[iz] 例如: study—studies buy--buys
4. 辅音字母+o结尾的+es, 读作[z]
例如: go—goes [z] do—does [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 [d?z] 2、say [sei] 说,讲－says [sez]
3、have [h?v]－has [h?z]动词单三句如何变疑问句He a bookhasDoeshave
肯定回答: Yes, 第三人称单数 does.
否定回答: No, 第三人称单数 doesn’t.
例如: Does she have a sister?
肯定回答: Yes, she does.
否定回答: No, she doesn’t.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 don't like football.
3. You have a computer.
You don't have a computer.
4. They have a keyboard.
They don’t have a keyboard.
5. My parents have a car.
My parents don't have a car.Thank You !Goodbye