一、教学目标与要求

了解电话的发展史和现状、电话的工作原理及不同种类的电话和它们各自的优越性；总结名词性从句的用法，是本单元的教学重点。通过对阅读课文的学习，学生应能运用所学语言，描述电话的发展史、电话的工作原理及各种电话的优越性，如：移动电话、无绳电话等。通过对话课的学习与操练，学生进一步巩固有关打电话用语；正确完成练习册安排的练习。

二、教学重点与难点

1．重点词汇 dial；；chat；hire；wind（v．）；strengthen；recover；distant；lately；inter－rupt；remain；lack；due；have…on；get together；all the best；have a word with；connect with；in other words；free of charge

2．重要句型 1）How a telephone works is a question which not everyone can answer．2）The problem with electrical signals is that they get weaker and weaker as they travel a-long metal wires．

3．语法 名词性从句（Noun Clauses） 1）That is why he decided to buy a mobile phone．2）Who made the long distance call to him is not important．3）The fact that we lack enough phones needs to be considered．4）We need to think about what we should say to the callers．

4．日常交际用语 打电话（Making telephone calls）1）Hello．Can I speak to Pippa，Please？2）There is no Pippa here．This is 8686087．3）I’m sorry．I think I dialled the wrong number．4）Hold on．I’ll go and get her．5）I called to ask you if you’d like to come to a lec－ture on Thursday evening at the college． 6）I’ll have to go now．Someone wants to use the phone．All the best．

三、课型

（一）对话课

Ⅰ．教具  录音机、投影仪。

Ⅱ．课堂教学设计

1．教师通过向学生提出以下问题导入本课：1）I understand that many of you have got telephones at home and you use them a lot．I want you to tell me why you make telephone calls to other people．2）What do you do if you want to make a phone call to somebody？Please describe it in English．（First you pick up the receiver，and then you dial the number/press the button…．） 3）What do you say if you want to speak to somebody on the phone？4）If you happen to be the person that the speaker wants to find，what would you say？5）If the person the speaker wants to find happens to be out，what would you say？6）In what situ－ation do you say：“Hold on，please”？

2．准备放对话录音。借助投影片打出以下听前提问： 1）What do you say if you happen to dial the wrong number？2）When and where is the lecture going to be given and what is the lecture about？

放录音一至两遍，请学生回答上述问题，教师予以必要订正。

Key：1）We may say：I’m sorry．I think I dialled the wrong number．2）The lecture is going to be given on Thursday evening at the college and it is about the universe．

3．再次放对话录音，学生跟读。将学生分为两人一组练习对话。经数分钟练习后，请两三组同学到前面表演，教师予以讲评。教师指导学生归纳本课中有关打电话（Making tele-phone calls）的常用语句（见日常交际用语部分）。

4．教师提供如下情景，组织学生编演新的对话：

Situation 1：A reporter is interviewing a young man about how often this young man and his family members use telephone and whether they have any problems with the telephones．

Situation 2：Make a dialogue of a telephone call．The students may desing different situ－ations．

数分钟后，请同学到前面表演，教师予以讲评。

5．布置作业   1）预习第90课；2）完成练习册中安排的练习。

（二）阅读理解课

Ⅰ．教具  录音机、投影仪

Ⅱ．课堂教学设计

1．检查生词及短语。

2．向学生提出以下问题： 1）What do you already know about telephones？2）What do you expect to learn from this reading comprehension？

3．准备阅读课文，教师给出读前提问：1）Were the earliest telephones popular？Please explain．2）When and where was the first telephone directory printed？

教师给学生数分钟，要求学生快速阅读课文，之后请同学回答上述问题。

Key：1）No，they were not popular．Because it took a long time before people began to hire or buy them．2）The first telephone directory was printed in a town in the USA in 1878．

4．放课文录音，学生跟读一至两遍。教师就课文内容提问，检查学生的理解程度：

1）Can all the people answer how a telephone works according to the passage？ 2）What happens to the sound waves of your voice when you speak into the telephone？3）What hap－pens next？4）What did people have to do if they wanted to make a phone call in the early days？5）What did the operator do at that time？6）How many telephones were there in the year 1877？7）And what about by the year 1990？8）Why are very thin glass pipes used today instead of metal wires？

Key：1）According to the passage，not everyone can answer this question．2）When you speak into the telephone，the sound waves of your voice are turned into electrical signals．3）Then the electrical signal is sent down a pair of wires to the receiving telephone．There the electrical signal is changed back into sound．4）In those days people had to wind a handle at the side of the telephone to produce enough electricity to make the phone call．5）The op－erator connected the two numbers and made a note of the lengtn of the telephone call and the charge．6）There were only 2 600 telephones in the year 1877．7）By the year 1990 there were over 300 million telephones in the world．8）They are used to send light signals instead of us－ing metal wires to send electrical signals．Because light signal can travel 150 km without get－ting weaker and their signal is clearer too．

5．准备阅读Mobile phones。要求学生在阅读短文后，用自己组织的语言描述以下内容：

Ask the students to describe the advantage of：1）mobile phones 2）a cordless phone 3）the new model for business people

6．课堂活动

要求学生在本课中找出与电话有关的词汇。

Model：

sound waves；electrical signals；a pair of wires；wind a handle at the side of the tele-phone；operator；length of the telephone call and the charge；the first telephone directory；telephone equipment；radio waves；light signals；metal wires；light wires；very thin glass pipes；conference calling；dialling；redirection；call waiting；mobile phones；a cordless phone，etc．

学生先在小组内交流并相互启发、补充，然后请学生在班上交流。

7．布置作业  1）复述课文，描写电话的工作原理；2）完成练习册中所安排的练习。

（三）语言训练课

Ⅰ．教具  投影仪。

Ⅱ．课堂教学设计

1．教师检查课文复述。

2．教师从本单元词语中选择部分常用词语，配以例句介绍给学生。要求学生反复练习这些例句，并请同学造句，教师予以讲评、订正。

1）dial

If you want to get the police，please dial this number．

Put in money before dialing．

2）have…on

Would you like to visit us this evening，or have you got something on this evening？

3）have a word with…

Could I have a word with you，Mr．Li？

4）connect with

The early bus from the village connects with the 8：30 train．

The visit of the police was not connected with the lost child．

5）wind v．

The river winds its way to the sea．

You should wind the clock twice a week．

6）in other words

I soon found that the work I was doing had already been done by someone else—in oth－er words，I was wasting my time．

7）due

The train was due in at nine o’clock from Shanghai．

They are due to meet again tomorrow．

A great deal of money is due to you．

8）lately

What have you been doing lately？

He has spent too much time on physics lately．

9）remind

The story you have just told me reminds me of an experience I once had．

Please remind me to write the letter．

10）lack v．/n．

As a young teacher，he still lacks experience．

I cannot buy it because of lack of money．

3．教师用投影片打出下表，要求学生描述电话的今昔。

Ask the students to make a comparison of the earliest telephones to the telephones of the present day．

七八分钟后，要求同学根据自己所填写内容，描述电话的今昔，教师予以讲评，鼓励学生将自己整理的内容连成短文。 4．布置作业  1）预习第24单元；2）完成练习册中安排的练习。 四、难句分析 1．The problem with electrical signals is that they get weaker and weaker as they travel along metal wires．电信号有一个难题，就是当其沿着金属导线传送时，信号会变得越来越弱。 这是一个复合句。主句是The problem with electrical signals is…，后跟一个作表语用的名词性从句：that they get weaker…metal wires，其中又包括一个表示时间的状语从句as they travel along metal wires。 get weaker and weaker（变得越来越弱），get是连系动词，意为：变得（become），后跟weaker and weaker作表语。这种“比较级+and+比较级”结构表示“越来越……”的意思。例如： When winter comes，the days get shorter and shorter．冬季到来后，白天越来越短。 My friend Bruce is becoming more and more interested in Chinese culture．我的朋友布鲁斯对中国文化越来越感兴趣了。 2．It also shows you the caller’s telephone number，in order that you recognize who it is． 而且它还可以把呼叫人的电话号码给你显示出来，以便你认出是谁在呼叫。 in order that是连词词组，意为：以便、为了；这样就……，连接一个表示目的的状语从句。 in order that和 so that的词义和用法相似，但前者既可以放在主句前，也可以放在主句后，而so that只能放在主句后。例如： I’m making a note of it in order that（so that） it will not be forgotten．我把这事记下来，以免忘记。 In order that it might not cause trouble，both sides discussed the agreement seriously．为了不致引起麻烦，双方对协议书进行了认真的讨论。（so that不能放在句首） 3．You can take it with you wherever you go．无论你走到哪儿，你都可以带着它。 wherever是连词，意为：无论何地；不管在哪里，相当于no matter where，常引导让步状语从句。再如： You’ll find the Chinese people friendly wherever you go．不管你走到哪里，都会发现中国人非常友好。 Wherever he is， he will be thinking of you．不论他在哪儿，他总会想念你。 I will find her wherever she may be．不管她可能在什么地方，我总会找到她。