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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 learnA 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 comput
2、er 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 TV.No, its not a T
3、V. 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 l
4、ike 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
5、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
6、尾的, 把y变成i, +es,读作iz,例如: studystudies buy-buys4. 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
7、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
8、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
9、 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 have two eyes? Yes, I do. 他有四条腿吗？ 不, 他没有。Does he have four legs? No, he doesnt.你们有牛奶吗？ 不, 我们没有。Do you have milk? No, we dont.,Thank You !,Goodbye,