人教版九年级全册Unit 6 When was it invented Writing课件 (共18张PPT)

(共18张PPT)
Unit 6 When was it invented Writing
单元写作目标：
能介绍一项发明及其发展，可以写出发明的时间、地点、发明人及其用途等主要内容。
1.能根据写作要求，收集、准备某一发明的相关信息；
2.能独立起草短文，并在教师的指导下进行修改；
3.能使用常见的连接词表示顺序和逻辑关系；
常用句型归纳如下：
It was invented by…；
It has…；
It is used for…；
It can...
Would you like to have a try
If you want to …
本单元写作常见话题：My favorite invention；How to become an inventor；A small invention that I love most；I want to invent…；The greatest invention in the history…
计算机在我们的工作、生活中的作用越来越大，你知道计算机的起源与发展吗？请就计算机的发明时间(1946年)、大小、用途等方面，谈一下它的发展变化，并说明未来你对计算机的畅想。
要求：1.意思连贯，语句通顺；
2．词数不少于 80；短文的开头已给出(不计入总词数)。
Computers are becoming more and more important in our daily life. Do you know the history and the changes of computers？…
典例.印证
【思路点拨】
1．体裁：说明文。
2．时态：一般现在时，一般过去时(被动语态)，一般将来时(畅想未来)。
3．人称：
一、三人称交替使用介绍计算机的历史、
用途及畅想。
4．写作思路：开头已经给出，接着介绍计算机的发明时间、大小，然后介绍计算机的用途，最后是对计算机的畅想。
5．注意事项：为了使短文显得完整流畅，应该根据提示，介绍的条理要清晰，合理使用时态，做到表达有序。
【范文展示】
Computers are becoming more and more important in our daily life. Do you know the history and the changes of computers？The computer was invented in 1946. At that time, the machine was huge and it was as large as a big house. It weighed about 30 tons.
The computer is a very useful tool in our life as well as work. For example, computers can send some messages to foreign friends by e－puters
can open our eyes to let us know more.It is the most helpful invention in the world. It can help us in study or work.There are many functions (功能).We can listen to music or play games on computers.It makes us relax.
It's hard to imagine what our life would be like if we had no computers in our daily life. And in my opinion, computers are going to change our life completely in the near future.
实战·演练
手机在现代生活中扮演着重要的角色。请你根据表格中的信息以“Mobile phone--- an important invention”为题，写一篇80词左右的短文。开头已给出。
提示：
when who how be used for size & influence & development
mobile phone 1938年 Motorola Company(摩托罗拉公司)Martin Cooper 最初是为美国军队发明, 至1973年开始民用（civil use） 打电话，发短信，上网，视频聊天, 娱乐等 早期的手机有砖块大小，后来越来越小巧轻薄......
Step 1: 细化审题——明要求
(1)体裁: 本文要求介绍几项发明, 故为 。
(2)时态: 本文为介绍某项发明的时间及用途, 故使用____ _ 和______ 。
(3)人称: 根据题目要求, 本文应使用__________。
(4)注意：文章写成三段体,使用恰当的逻辑连接词是文章连贯。
一般过去时
第三人称
一般现在时
说明文
Step 2: 遣词谋篇——列提纲
useful expressions:
as we all know, more and more,
be used for, be invented by/in, because of, without doubt, not not... but also... ; for example, in a word， all in all
It can ...
It helps us...
It is true that...
What's more, ...
There is no doubt that
Para 1
Para 2
Para 3
Step 3: 润色成篇
——出佳作
Mobile phone--- an important invention
The mobile phone is becoming more and more important in our daily life.The first mobile phone was invented . Later,it is used for .
As we all know, the mobile phones are used in many ways. For example, they can . Also, we can .
.
There is no doubt that .
My Favorite Invention
　The mobile phone is my favorite invention.The first mobile phone was invented for the US Army in 1938 in America.Until 1973, Martin Cooper from Motorola Company invented the first mobile phone for civil use.
Since then，the world has been changed because of the useful invention.
As we all know, mobile phones are being more and more widely used in our daily life.They are used in many ways.
First，they offer fast and convenient service for communication.
They are used for calling.We can talk with our friends or parents
for a long time.And they are becoming smaller and lighter.It's quite easy for us to carry them everywhere.They can also be used for sending short messages to show our feelings to our friends.What's more，we can surf the Internet on mobile phones.That helps us open up our eyes to the outside world.And when we are tired，we can listen to music to relax ourselves.Our life becomes more colorful because of the invention of the mobile phone.
There is no doubt that the mobile phone plays an important part in our daily life.
典例.印证
根据下面的表格内容写一篇文章。要求:
80词左右。开头已给出，不计入总词数。
Inventions When Who Be used for
abacus in the 6th century Chinese people counting
bicycle in the 1880s people in England travelling
potato chips in 1853 people in England eating
Tea over 3000 years ago the Chinese ruler Shen Nong drinking