初中英语牛津译林版八年级下册Welcome to the unit精品课件ppt

设计说明

首先通过观看一组电脑零部件的图片导入新课，并学习一些有关电脑主要部件的单词。根据所学的词汇来谈论电脑的用途，继而编成对话。最后学习Comic strip的对话，讲解本课节的知识点，然后用一些练习来巩固所学知识。

教学目标

通过本课节的教学，让学生达成以下目标：

1.知识目标

掌握词汇：programme, keyboard, unit, main unit, mouse, screen, receive, look like, search for information, send and receive emails

2.能力目标

(1)了解并掌握电脑主要部件的英文名称；

(2)能用英语谈论电脑的基本用途。

3.情感目标

通过了解电脑主要部件的英文名称和基本用途，激发学生热爱学习的情感。

重点难点

1.重点：了解并掌握电脑主要部件的英文名称。

2.难点：能用英语谈论电脑的基本用途。

教学准备

PPT 课件；相关图片；Part B听力。

授课时数

1课时

教学过程

Step 1　Lead-in

1. Teach new words.

Show some pictures and ask: How well do you know a computer?

     screen n. 屏幕                    keyboard n. 键盘

           mouse n. 鼠标               main unit n.（电脑）主机

programme n. 节目，计划，方案 channel n. 频道 remote control n. 遥控器

2. Read and remember the new words.

New words: screen, keyboard, mouse (pl. mice或mouses)，main unit, programme, channel, remote control

Step 2　Presentation  

1. Learning about computers

Part A Annie, Simon’s cousin, wants to learn about the different parts of a computer. Look at the picture below and help her write the correct answers in the boxes. Check the answers with students.

Answers: 1. screen　2. main unit　3. keyboard　4. mouse

2. Think and speak.

(1) Ask: What do you usually use your computer for?

Present some pictures of different uses of computers.

chat with friends                      play games

send and receive emails                 do word processing

         search for information                watch videos

(2) What other things can we use computers for?

draw and design

write computer programs

make flash…

Step 3　Part B

1. Listen and answer

(1) What does Simon usually use the computer for?

(2) How often does Simon use it?

Answers: (1) He usually uses it to search for information.　(2) He uses his computer almost every day.

2. Read and think

A: What do you usually use your computer for?

B: I usually use it to…

A: Why?

B: Because …

A: How often do you use it to do so?

B: I use my computer to…every day.

Work in pairs. Make a dialogue by themselves. Use the dialogue above as a model. Then choose some pairs to present their dialogues.       

Step 4　Discussion

1. Let’s discuss! What should we know about using computers? Give students 2 minutes to discuss the topic. Then choose some students to share their ideas about the usage of computers.

2. Give a summary about the usage of computers.

We must know computers may…

(1) do harm to our eyesight.          

(2) be harmful to our health.

(3) cause us to make bad friends.

(4) cost much money.

(5) make us give up our study.

(6) make us lose interest in other things.

3. Teachers’ advice on computers:

(1) Don’t be crazy about computer games!

(2) Don’t trust strangers online or tell them your personal information!

(3) Be sure to do more exercise and live a healthy life!    

Step 5　Comic strip

1. Show two pictures about Eddie and Hobo and ask: What are they talking about?

Answer: They are talking about computers.

2. Listen and answer more questions.

(1) What do Eddie and Hobo think the computer look like?

(2) Do you know what “the remote control” really is?

Answers: (1) They think it looks like a TV.　(2)It is a mouse.

3. Watch, listen and repeat the dialogue between Eddie and Hobo.

4. Read and act the dialogue between Eddie and Hobo. Practice and act out the dialogue in pairs.

5. Read and fill in the blanks.

Eddie and Hobo see the computer for the first time. They don’t know what it is. Hobo thinks it _______ ________ a _________. And Eddie thinks the mouse is the _______ ________. They think the _________ is boring. So they want to use the mouse to _______ _______ _______. How funny they are!

Answers: looks like, TV, remote control, programme, change the channel

Step 6　Language points

1. online adj. 联网的，在线的

  online shopping/travelling网购/网上旅游

Young people like to chat with online friends.年轻人喜欢和网友聊天。

2. agree with sb 同意某人（的意见、观点、看法等）

agree to do sth 同意做某事

She agrees with her parents. 她同意她父母的观点。

Lucy agrees to wash her clothes tonight. 露西同意今天晚上洗她的衣服。

3. use sth to do sth= use sth for doing sth使用某物做某事

It’s fast and easy to use computers to search for/for searching for information. 用电脑搜索信息既快又容易。

4. mouse鼠标（复数：mouses/mice）

There are many mouses/mice for you to choose in the shop.

商店里有很多鼠标供你选择。

5. look/be like 看起来像

  It looks like a TV. 它看起来像台电视机。

He did not look like an evil person. 他看起来不像一个恶人。

【拓展】look at 看一看 look for 寻找

look after 照顾 look out 留神，当心

look forward to sth/doing sth期盼某事/做某事

6. change  vt. 换　vi. & n.改变，变化

Let’s change the channel. 咱们换个频道吧。

  My hometown has changed a lot in the last few years.

=There have been a lot of changes in my hometown in the last few years.

过去几年里我的家乡发生了很多变化。

7. send and receive emails收发邮件

  receive vt. 收到，接到

I have just received his reply. 我刚刚收到他的回信。

【辨析】receive与 accept

receive 动词，意为“接到”，指收到某物这一动作，不包含主观上愿意接受的意思。

accept 动词，意为“接受”，指经过考虑，强调主观上愿意接受。

I received an invitation to the party yesterday, but I refused to accept it.

昨天我接到一份参加晚会的邀请，但我拒绝接受。

【注意】receive是短暂性动词，不能和由since / for引导的短语连用，必须转化成延续性动词才可以连用。

I have received your email. 我已经收到了你的邮件。

  I have had your email for a few hours. 我收到你的邮件几小时了。

同样，hear from sb与receive one’s letter也可以这样转化。

他已经收到了你的信。

He has received your letter.

= He has heard from you.

他收到你的信一周了。

  He has had your letter for a week.

= He has had your letter since last week.

Step 7　Homework

1. Read the text book and learn the new words and dialogues by heart.

2. Do the exercises on the learning paper.

3. Prepare for the next class. Listen and read the article on P36—37.

板书设计