Lesson 3 A computer has a keyboard（第2课时） 课件(共20张PPT)

(共20张PPT)
英 语
科普版 五年级（上册）
Lesson 3
A computer has a keyboard
（第2课时）
Let's learn
知识讲解
Does a TV have a screen
Yes, it does.
Does a computer have
a mouse
Yes, it does.
知识讲解
Does a TV have a mouse
No, it doesn't.
知识讲解
Does a computer have
a keyboard
Yes, it does.
知识讲解
Does a TV have a keyboard
No, it doesn't.
知识讲解
这时需要助动词！（一般现在时的助动词有does+do）
问句:Does+主语(第三人称单数)+动词原形+其他
肯定回答: Yes, he/she does.
否定回答: No, he/she doesn't.
eg:Does Tom have a computer 汤姆有一台电脑吗
Yes, he does. 是的，他有。No, he doesn’t. 不，他没有。
he/she/Tom/Lily...
一般现在时，谓语为实义动词，怎么变一般疑问句呢？
知识讲解
问句:Do+主语(非第三人称单数）+动词原形+其他
答语:Yes, 主语 + do. No, 主语+don't.
eg: Do you have a pencil 你有一支铅笔吗
Yes, I do. 是的, 我有。 No, I don’t. 不是, 我没有。
当主语不是第三人称单数时，我们应该选什么助动词呢？
I/you/they
知识讲解
知识拓展
常见家用电器
fridge 冰箱
常见家用电器
washing machine 洗衣机
知识拓展
常见家用电器
radio 收音机
知识拓展
常见家用电器
air conditioner 空调
知识拓展
连一连
Let's connect together.
keyboard
TV
computer
mouse
选一选
( ) 1. A ______ has a keyboard.
A. book
B. computer
C. TV
Look and choose.
B
( ) 2. Does a computer ______ a mouse
A. have
B. has
C. having
Look and choose.
A
选一选
Let's sing
唱一唱
Two little eyes open and close.
Two little ears and one little nose.
Two little cheeks and one little mouth.
Two little lips with teeth closed in.
https://www.21cnjy.com/help/help_extract.php