第四课时 Lesson 22 Travel on the Internet
课时目标
重点单词 receive v．收到；接到cancer n．癌症blessing n．祝福；保佑；赞美pyramid n．金字塔Egypt埃及
重点短语 grow up成长；长大all over the world全世界；世界各地show sb.sth.给某人展示某物come true实现
重点句子 1.Jane grew up with her grandma.简在她奶奶身边长大。2．Her grandma had a terrible type of cancer.她的奶奶患上了一种很严重的癌症。3．She asked people if they could help her grandma see the world through pictures.她问大家是否能够帮助奶奶通过图片看世界。4．In the last one，she was standing in front of Big Ben in England.在最后一张图片里，她正站在英国的伊丽莎白塔前面。5．You have made my dream come true.你使我的梦想变成了现实。6．Neither Jane nor her grandma would ever forget that day.简不会忘记那一天，她的奶奶也不会。
教学难点 能够掌握文中的重点单词、短语和句子
自主学习
一、根据句意及汉语提示写出单词。
1．How many messages have you received(收到)
2．This is our best blessing(祝福)for you.
3．Her old grandpa died of cancer(癌症)．
4．The pyramid(金字塔)in Egypt(埃及)is very famous.
二、写出下列画线短语的汉语意思。
1．Jane grew_up with her grandma.成长；长大
2．They began posting pictures of Grandma visiting places all_over_the_world.全世界；世界各地
3．Grandma was very surprised when Jane showed_her_the_pictures.给某人展示某物
4．You have made my dream come_true.实现
教学过程
环节1 新课导入
Ask students to look at some pictures of famous places.
T：Here are some pictures of famous places in the world.Look! What are they
S1：The first picture is the Pyramids.
S2：The second picture is the Statue of Liberty.
S3：The third picture is the Great Wall.
S4：The fourth picture is the Sydney Opera House.
T：OK.Today we will learn a passage about travel on the Internet.
设计意图：通过展示图片和师生问答的方式不仅可以吸引学生的注意力，还可以检验学生的课外积累情况和课前预习效果。
环节2 新课学习
1．让学生结对讨论教材第56页上方“THINK ABOUT IT”的两个问题，然后邀请几名学生分享自己的看法。
2．让学生浏览活动1的4个问题，然后带着问题阅读文章，找到问题的答案并做好相应的记号。教师请4名学生分享自己的答案，然后订正答案。
3．让学生再次阅读短文，勾画出短文中的生词、重点短语和句子。教师讲解学生标出的生词、重点短语和句子以及文中出现的其他重难点(教师可邀请学生尝试翻译一些句式较为复杂的难句)。
4．让学生朗读活动2方框中的单词，并理解其意思，然后用方框中所给单词的适当形式完成活动2中的5个句子。教师请五名学生分享自己的答案，然后核对答案。
5．让学生观察活动3的图片，并模仿第一幅图片下方文字说明的格式把其他几幅图片也补充完整，教师核对答案。
6．要点点拨。
(1)Her grandma had a terrible type of cancer.
have cancer意为“患癌症”。have在此表示“患(病)，得(病)”，与catch和get同义。但have是延续性动词，表示状态； catch和get是瞬间动词，表示动作，不可跟一段时间连用。例：I caught/got a bad cold three days ago.我三天前得了重感冒。
(2)She asked people if they could help her grandma see the world through pictures.
if在句中作连词，意为“是否”，引导宾语从句。例：The teacher asked if everyone was here.老师问人是否到齐了。
(3)You have made my dream come true.
make one's dream come true意为“使某人的梦想成真”。come true表示“实现，成真；应验”。例：His dream will come true sooner or later.他的理想迟早会实现。
(4)Neither Jane nor her grandma would ever forget that day.
neither...nor... 既不……也不……，当它连接两个并列成分作主语时，谓语动词的数与nor后的主语的数保持一致。例：Neither you nor I like going shopping.你不喜欢购物，我也不喜欢。
7．学以致用。(汉译英)
(1)我头痛已经三天了。
I have had a headache for three days.
(2)请告诉我你是否知道答案。
Please tell me if you know the answer.
(3)我希望我们的梦想成真。
I hope our dreams will come true.
(4)他现在既没有阅读也没有写字。
He is neither reading nor writing.
设计意图：让学生带着问题去阅读文章有助于提高阅读的效率。
环节3 学习Project
1．让学生想象如果自己也能帮助简的奶奶去实现梦想，会做些什么。
2．让学生四人一组，通过做笔记来或者画画的方式给出答复。
3．让每个小组展示出小组的成果，然后教师予以评价。
设计意图：通过此环节的设计，不仅让学生更富有爱心，同时可以提升他们学英语的兴趣；通过小组活动，可以增进同学间的友谊，培养学生的团队协作能力。
板书设计
Unit 4 The Internet Connects UsLesson 22 Travel on the Internet
receivecancerblessingpyramidEgyptgrow upall over the worldshow sb.e true Her grandma had a terrible type of cancer.She asked people if they could help her grandma see the world through pictures.You have made my dream come true.Neither Jane nor her grandma would ever forget that day.
练习设计
请完成本课对应训练！第二课时 Lesson 20 A Computer Helps！
课时目标
重点单词 laptop n．笔记本电脑Easter n．复活节enter v．输入；进入key n．关键；钥匙search n．&v.搜索；查找topic n．话题depend v．依靠；取决于bunny n．兔子hide v．隐藏；躲避
重点短语 ask...to do...让……做……decide to do决定做……search engine搜索引擎depend on依靠；取决于；根据Easter Bunny复活节兔子
重点句子 1.It's one of the biggest holidays in many countries.这是许多国家最盛大的节日之一。2.Do you often search for information on the Internet？你经常在网上搜索信息吗？3．I entered some key words into a search engine to find information on this topic.我输入一些关键字在搜索引擎中，找到关于这个话题的信息。4．Easter does not fall on the same day each year.每年复活节不落在同一天。5．The date depends on the moon，but it is always in March or April.日期取决于月亮，但它总是在三月或者四月。6．In this way，it is like the Chinese Spring Festival.通过这种方式，就像中国的春节一样。
教学难点 能读懂描述复活节的句子并且能初步学会用英语来介绍复活节；学会使用电脑搜索信息和正确使用电脑
自主学习
一、根据句意及首字母或汉语提示写出单词。
1．On Easter Day，people often hide chocolate eggs for the children to find.
2．Mary studies very hard.Her dream is to enter one of the most famous universities in the US.
3．He left his keys(钥匙)in the office.He had to get them back.
4．Our teacher asked us to search(搜索) for some information about the Easter Bunny.
二、写出下列画线短语的汉语意思。
1．I entered some key words into a search_engine to find information on this topic.搜索引擎
2．The date depends_on the moon，but it is always in March or April.依靠；取决于；根据
教学过程
环节1 新课导入
Review：The Grammar—Adverbial Clause with “if”．
Ask some students to make sentences with “if”．
T：In this lesson，we will go on talking about the computer，and we must know how important the computer is.
设计意图： 通过请学生用“if”造句可以检验学生对上节课所学知识的掌握情况，同时自然而然地引出本课时的话题。
环节2 新课学习
1．将学生分成若干小组，讨论教材第52页上方“THINK ABOUT IT”中的问题。
2．教师邀请每个小组的一名学生说出小组讨论后所得的结果，并对表述有误的学生予以指正。
3．让学生快速阅读教材第52页中的文章，并了解其主旨大意。
4．教师播放文章的录音，然后让学生小声跟读。
5．让学生精读这篇文章，并标记出文中的生词、重要短语和句子，教师予以讲解(教师在讲解的过程中可邀请学生尝试翻译其中的重难句)。
6．教师播放活动1的录音，学生边听录音边完成活动1的练习题。教师邀请学生分享自己的答案，最后教师订正答案。
7．让学生根据教材第52页的内容完成活动2的任务，并请一名学生朗读一遍这段话，教师核对答案。
8．让学生根据文章内容完成活动3的思维导图。教师请学生分享自己的答案，最后教师订正答案。
9．教师将学生分为若干小组，并让他们共同收集、讨论有关中国春节的相关信息，最后共同制作成一个思维导图。
10．教师请每个小组的一名学生分享自己小组的成果，然后再请其他小组进行评论，最后教师予以点评。
11．要点点拨。
(1)It's one of the biggest holidays in many countries.
one of...意为“……之一”。“one of ＋ 形容词的最高级 ＋ 可数名词的复数”意为“最……的……之一”，作主语时，中心词是one，其后的谓语动词用单数形式。例：Wang Li is one of the cleverest girls in our class.王丽是我们班最聪明的女孩之一。
(2)The date depends on the moon，but it is always in March or April.
depend on取决于；依赖；依靠。例：I depend on my pen for a living.我靠写作为生。
12．学以致用。(单项选择)
( C )(1)Mount Huang is one of ________ in China.
A．most famous
B．most famous mountains
C．the more famous mountains
D．more famous
( A )(2)Where to go ________ my mother.I will ask her.
A．depends on B．depend on
C．decided on D．decides on
设计意图：通过让学生分组讨论可以促进学生之间的交流合作，培养学生的团队合作能力，增进他们之间的友谊；同时，通过做相应的练习题来检验学生的阅读掌握情况，让学生深入了解课文内容，并掌握文中的重点单词、短语和句子。
板书设计
Unit 4 The Internet Connects UsLesson 20 A Computer Helps！
laptop Easter enter key search topicdepend bunny hideask...to do...decide to dosearch enginedepend onEaster Bunny It's one of the biggest holidays in many countries.The date depends on the moon，but it is always in March or April.
练习设计
请完成本课对应训练！第六课时 Lesson 24 An E－mail to Grandpa
课时目标
重点短语 set up a time约个时间go online上网make a phone call打电话
重点句子 1.It would be a lot of fun to see each other as we talk！我们谈话时能看见彼此会是一件很有趣的事情！2．Can we set up a time to go online together 我们能定个时间一起上网吗？3．It can give me directions to anywhere I want to go.我想去任何地方，它都可以给我指引方向。
教学难点 掌握本课时重点短语和句型；学会使用网络发邮件
自主学习
写出下列画线短语的汉语意思。
1．Can we set_up_a_time to go_online together 约个时间 上网
2．I like to communicate with my friends by making_a_phone_call.打电话
教学过程
环节1 新课导入
T：Do you communicate with your friends very often？What kind of way do you like to communicate with your friends
S1：I like to communicate with my friends by writing letters.
S2：I like to communicate with my friends by sending e－mails.
...
T：Today we will learn about an e－mail.
设计意图：通过问与学生切身相关的生活中的问题激发学生的学习兴趣，活跃课堂氛围，同时为接下来的学习做好铺垫。
环节2 新课学习
1．让学生思考教材第60页的“THINK ABOUT IT”的两个问题，然后和同桌进行分享交流。
2．让学生仔细阅读教材第60页的邮件，了解其主旨大意。然后勾画出其中的重点短语和句子，教师进行一一讲解。
3．让学生浏览活动1的句子，预测听力内容。
4．教师播放录音，学生完成活动1的听力练习。教师请学生分享自己的答案，最后教师订正答案。
5．让学生浏览活动2方框中的单词和短语，并知道其意思，然后用这些单词和短语的适当形式完成活动2中的句子。教师请学生分享自己的答案，最后订正答案。
6．让学生根据活动3给出的提示，选择自己经常与朋友交流的方式并说明其原因。教师请几名学生分享自己的观点，并予以点评。
7．让学生在班级里做个调查，互相询问对方上网一般是做些什么，并进行总结。
8．教师让学生分享自己的调查报告并根据自己的调查报告说一说自己的看法和建议。
9．要点点拨。
(1)It would be a lot of fun to see each other as we talk!
【辨析】as、when与while
①as作连词，引导时间状语从句，表示“一边……一边……；随着”，as从句的动作是延续性的，一般用于主句和从句动作同时发生。例：As time went on，the weather got better.随着时间的推移，天气变得好多了。
②when引导的从句中的谓语动词可以是延续性的，也可以是瞬间动词。并且when有时表示“就在那时”。例：Sorry，I was out when you called me.对不起，你给我打电话时我出去了。
③while引导的从句中的谓语动词必须是延续性的，并强调主句和从句的动作同时发生(或者相对应)，while有时还可表示对比。例：While we were talking，the teacher came in.老师进来的时候，我们正在说话。
(2)Can we set up a time to go online together
set up在句中意为“安排”。此外，它还可表示“建立，设立”。例：We have set up a time to hold a class meeting.我们安排了一个时间开班会。
(3)It can give me directions to anywhere I want to go.
anywhere作副词，用于肯定句时意为“随便什么地方”。例：Sit anywhere.随便坐。
10．学以致用。(汉译英)
(1)学生们边听边做笔记。
The students took notes as they listened.
(2)你不能一边看电视一边做家庭作业。
You can't do your homework while you are watching TV.
(3)当我赶到机场时，客人们已经离开了。
When I got to the airport，the guests had left.
(4)他们建立了几家医院来帮助病人。
They set up a few hospitals to help the sick people.
(5)这些天你可以去任何地方。
You can go anywhere these days.
设计意图：通过该环节的设计，培养学生获取关键信息的能力和概括主要内容的能力；通过调查的方式丰富教学形式，让学生将所学知识运用到实际生活中去，增强学生的自信心。
板书设计
Unit 4 The Internet Connects UsLesson 24 An E－mail to Grandpa
set up a timego onlinemake a phone call It would be a lot of fun to see each other as we talk!Can we set up a time to go online together It can give me directions to anywhere I want to go.
练习设计
请完成本课对应训练！Unit 4 The Internet Connects Us
单元目标
知识目标 Lesson 19 重点单词 technology，desktop，tablet，keyboard，invitation，industry
重点短语 used to do sth.，chat with，blog about，do research，work hard，know about
重点句子 1.I used to have a desktop computer，but now I have a tablet.2．I like chatting with my friends online.3．I use the Internet to blog about donuts.4．If we want to have a meeting，I can send the invitation online.5．If I work hard this evening，I will complete my research.6．Coffee grows in more than 70 countries！
Lesson 20 重点单词 laptop，Easter，enter，key，search，topic，depend，bunny，hide
重点短语 ask...to do...，decide to do，search engine，depend on，Easter Bunny
重点句子 1.It's one of the biggest holidays in many countries.2．Do you often search for information on the Internet 3．I entered some key words into a search engine to find information on this topic.4．Easter does not fall on the same day each year.5．The date depends on the moon，but it is always in March or April.6．In this way，it is like the Chinese Spring Festival.
Lesson 21 重点单词 press，appear，modern，electronic，sell
重点短语 pass on，change the world，keep on，by hand，printing press
重点句子 1....and people passed on their knowledge by telling stories.2．They wrote each word by hand.3．Then，the printing press appeared and changed the world.4．With modern technology，it was possible to print books quickly.5．No matter what you have，a computer，a tablet，a laptop，an e－reader or a real book，keep on reading！
Lesson 22 重点单词 receive，cancer，blessing，pyramid，Egypt
重点短语 grow up，all over the world，show sb.sth.，come true
重点句子 1.Jane grew up with her grandma.2．Her grandma had a terrible type of cancer.3．She asked people if they could help her grandma see the world through pictures.4．In the last one，she was standing in front of Big Ben in England.5．You have made my dream come true.6．Neither Jane nor her grandma would ever forget that day.
Lesson 23 重点单词 advantage，disadvantage，simple，coin，cause，less，aside，attack，web，steal，banking，properly
重点短语 in seconds，far away，aside from，take up
重点句子 1.People are able to connect and share information in seconds.2．It helps us get things done more quickly.3．And if a friend lives far away，the Internet makes it easy to stay in touch.4．But every coin has two sides.5．Spending too much time online is harmful to people's health.
Lesson 24 重点短语 set up a time，go online，make a phone call
重点句子 1.It would be a lot of fun to see each other as we talk!2．Can we set up a time to go online together 3．It can give me directions to anywhere I want to go.
语法目标 掌握if引导的条件状语从句的用法
技能目标 能够运用所学词汇和句型谈论计算机和网络的功能及影响
写作目标 能够写关于电脑和因特网的文章
情感目标 激发学生对科学的热爱和对英语学习的兴趣；认识到网络对我们学习和生活的积极作用和消极影响，引导学生科学合理地上网第五课时 Lesson 23 The Internet－Good or Bad？
课时目标
重点单词 advantage n．优势；有利条件disadvantage n．缺点；不利因素simple adj.简单的；简明的coin n．硬币cause v．造成；引起less adj.&adv.更少/小的(地) n．较少量；较小的部分aside adv.除……之外；在旁边attack v．袭击；损害web n．网络；网steal v．偷盗；窃取banking n．银行业properly adv.正确地
重点短语 in seconds在很短的时间内far away遥远aside from除此之外take up占用，占据；开始从事；接受(提议)
重点句子 1.People are able to connect and share information in seconds.人们能够在很短的时间内相互联系并分享信息。2．It helps us get things done more quickly.它有助于我们把事情做得更快。3．And if a friend lives far away，the Internet makes it easy to stay in touch.如果一位朋友住得很远，互联网使得相互联系变得容易。4．But every coin has two sides.但是任何事物都有两面性。5．Spending too much time online is harmful to people's health.在网上花太多的时间对人们的健康有害。
教学难点 掌握文中的重要单词、短语和句子；能够写一篇有关网络优缺点的文章
自主学习
一、根据句意及汉语提示写出单词或用所给词的适当形式填空。
1．This kind of new car has a lot of advantages(优点)．
2．We are not rich，but we live a happy and simple(简单的)life.
3．The bad weather caused(造成)lots of problems last winter.
4．How many coins (coin) do you have Are they enough to buy a book
5．We should use the Internet properly (proper)．
二、写出下列画线短语的汉语意思。
1．People are able to connect and share information in_seconds.在很短的时间内
2．And if a friend lives far_away，the Internet makes it easy to stay in touch.遥远
3．Aside_from that，some people attack the web... 除此之外
4．The Internet can be a useful tool，but don't let it take_up all of your time.占用，占据
教学过程
环节1 新课导入
T：Look at the picture and answer my question.
T：Do you know where these students live And why we can see them
S1：They live in Africa.Because of the Internet，we can meet them in seconds.
T：Where is this place
S2：It's the South Pole.It's far away from us.But the Internet can help us learn a lot about it.
T：If your friend and you are not in the same school，how do you contact
S3：The Internet makes it easy for me to stay in touch with her/him.
...
设计意图：通过展示图片并提问可以鼓励学生多说多思考，同时引出本课时所要学习的内容，为接下来的学习做好铺垫。
环节2 新课学习
1．让学生思考教材第58页上方“THINK ABOUT IT”的两个问题，然后和自己的同桌讨论。
2．让学生浏览一遍文章，了解文章的主旨大意。
3．学生再次阅读文章并勾画出文中的重点单词、短语及句子，然后教师一一进行讲解。
4．让学生仔细阅读文章，把网络的优缺点分别填写在活动1的方框中。教师邀请学生分享自己的答案，然后全班一起核对答案。
5．让学生浏览活动2的问题，预测听力内容。
6．教师播放活动2的录音，学生完成练习。教师请学生分享自己的答案，最后订正答案。
7．让学生在活动3中勾出自己认为初中生可以借助因特网做的事并给出理由。
8．教师请学生分享自己的答案及看法，然后教师予以点评。
9．要点点拨。
(1)People are able to connect and share information in seconds.
①be able to do sth.意为“能够做某事”，主要指通过努力而获得的能力，有人称和时态的变化。例：Will you be able to come tomorrow？明天你能来吗？【链接】情态动词can也表示“能，会”，只有现在时can和过去时could两种时态，没有人称变化。
②in seconds 短时间内；几秒钟之内。例：You just need to press the button and it will start in seconds.你只须触摸按键，它就会在几秒内启动。
(2)It helps us get things done more quickly.
get sth.done意为“完成/做完某事”，通常由自己完成。此外，get/have sth.done还有“让某人做某事”的意思。例：I am going to get/have my hair cut.我要去剪发。
(3)And if a friend lives far away，the Internet makes it easy to stay in touch.
“make＋ it＋ adj.(＋for sb.) ＋to do sth.”意为“使做某事(对某人来说)变得……”。例：The teacher tried to make it easy for the students to learn math.老师尽力使数学对学生们来说学起来容易。
10．学以致用。(汉译英)
(1)我能够独立做这项工作。
I'm able to do the work all by myself.
(2)我们会坚持不懈，直到这项工作完成。
We will stay on it until we get the work done.
(3)练习使学好英语变得容易。
Practice makes it easy to learn English well.
设计意图：通过做相应的练习题巩固学生所学的重难点知识，并让学生能够正确认识到网络的优缺点，合理地使用网络。
板书设计
Unit 4 The Internet Connects UsLesson 23 The Internet—Good or Bad？
advantage disadvantagesimple coin cause less aside attack websteal banking properlyin seconds far away aside from take up People are able to connect and share information in seconds.It helps us get things done more quickly.And if a friend lives far away，the Internet makes it easy to stay in touch.
练习设计
请完成本课对应训练！第一课时 Lesson 19 How Do You Use the Internet？
课时目标
重点单词 technology n．技术desktop n．台式电脑；桌面tablet n．平板电脑；牌；碑keyboard n．键盘invitation n．邀请industry n．工业；企业；行业
重点短语 used to do sth.过去常常做某事chat with和……聊天blog about发关于……的博客do research做研究work hard努力工作know about知道；了解
重点句子 1.I used to have a desktop computer，but now I have a tablet.我过去有一台台式电脑，但现在我有一台平板电脑。2．I like chatting with my friends online.我喜欢和我的朋友们在网上聊天。3.I use the Internet to blog about donuts.我使用互联网来写关于甜甜圈的日志。4．If we want to have a meeting，I can send the invitation online.如果我们想举行会议，我可以在网上发出邀请。5．If I work hard this evening，I will complete my research.如果我今晚努力工作，我将完成研究。6．Coffee grows in more than 70 countries！咖啡生长在70多个国家！
教学难点 掌握if引导的条件状语从句的用法
自主学习
一、用方框中所给单词的适当形式填空(每词限用一次)。
1．I have a desktop with a keyboard and a mouse.
2．The new technology has been more widely adopted.
3．The car industry is important to the United States.
4．Thank you for your invitation.I'll get to your birthday party on time.
5．Jenny is planning to travel to China next summer.
二、写出下列画线短语的汉语意思。
1．I used_to_have a desktop computer，but now I have a tablet.过去有
2．I like chatting_with my friends online.和……聊天
3．I use the Internet to blog_about donuts.写关于……的博客
4．I like doing_research for my homework on the Internet.做研究
5．If I work_hard this evening，I will complete my research.努力工作
教学过程
环节1 新课导入
T：Good morning，class! How are you today
Ss：Good morning! Fine，thank you.And you
T：I'm fine，too.Let's have a free talk.What day is it today
S1：It's Friday.
T：What do you often do after school
S2：I often play games on the Internet.
S3：I often read books on the Internet.
S4：I often watch movies on the Internet.
...
T：OK.Today we will learn about Internet.
设计意图：通过使用亲切、贴近生活的问候语言拉近师生之间的关系，带学生进入学习英语的氛围中，同时为本课时的学习做好铺垫。
环节2 新课学习
1．结对练习，讨论教材第50页对话上方的“THINK ABOUT IT”的两个问题。教师邀请几名学生说出自己的看法，表述有误的教师予以指正。
2．让学生快速阅读教材第50页的文章，教师邀请一名学生说出该文章谈论的主题。
3．教师邀请几名学生分角色朗读文章，并注意纠正学生的发音。
4．让学生精读文章，完成活动1的练习，同时标记出文章中的重要词汇和句型。
5．教师核对活动1的答案，然后对学生标记出的重要知识点和其他重难点进行一一讲解(教师可邀请学生试着翻译一些句式较为复杂的句子)。
6．让学生完成活动2 的句子，并让学生观察这些句子并总结规律。
7．教师邀请四名学生分别读一读这四个句子，然后再请两名学生分享自己总结的规律，教师订正答案并详细讲解if引导的条件状语从句的用法。
8．让学生先浏览活动3的搜索主页，然后再浏览活动3下方的5个句子，并按照要求完成活动3的练习。教师邀请几名学生分享自己的答案，最后教师订正答案。
9．要点点拨。
(1)I used to have a desktop computer，but now I have a tablet.
used to do sth.过去常常/过去习惯做某事。例：We used to be good friends，but we fell apart about a year ago.我们过去是好朋友，但大约一年前关系破裂了。
【拓展】be/get/become used to＋sth./doing sth.习惯于(做)某事。例：He should be used to doing more important jobs.他应该习惯做一些更重要的工作。
(2)If we want to have a meeting，I can send the invitation online.
if引导的条件状语从句
定义：if意为“如果，假如”，它引导的句子表示某事发生所需要的条件，即“在……条件下，某事才能发生”，在句子中充当条件状语从句。
位置：if引导的条件状语从句既可以放在主句前，也可以放在主句后。从句位于主句之前时，常用逗号将其与主句隔开。
时态：①在含if条件状语从句的复合句中，主句用一般将来时，从句用一般现在时表示将来，即“主将从现”原则。例：We will go to the park if it doesn't rain tomorrow.如果明天不下雨的话我们将去公园。
②在含if条件状语从句的复合句中，如果主句有must、can、may等情态动词，从句用一般现在时，即“主情从现”原则。例：You must stop crossing the road if the traffic light is red.如果交通灯是红色的你必须停止过马路。
③在含if条件状语从句的复合句中，主句是祈使句，从句用一般现在时表示将来，即“主祈从现”原则。例：Don't wait for me if I am late.如果我晚了就不用等我了。
【注意】①在含if引导的条件状语从句的复合句中，主句一般不使用be going to结构表示将来，而要用will。例：We will go shopping if you are free.如果你有空，我们就去购物。
②在if引导的条件状语从句中不能够使用some，而要用any。例：If you have any questions to ask，please come to my office.如果你有问题要问的话，请到我办公室来。
10．学以致用。(根据汉语意思完成句子)
(1)李明过去常常使用这台电脑。
Li Ming used to use this computer.
(2)如果你没有时间，我就为你做这件事。
I'll do this for you if you don't have time.
(3)如果雾变得更大，飞机可能会延迟。
If the fog gets thicker，the plane might be delayed.
设计意图：通过运用泛读和精读的策略，让学生掌握阅读技巧；通过让学生自己总结规律，锻炼学生善于观察和思考的能力，从而提升学习效率。
板书设计
Unit 4 The Internet Connects UsLesson 19 How Do You Use the Internet？
technology desktop tablet keyboard invitation industry used to do sthchat with blog aboutdo researchwork hard know about I used to have a desktop computer，but now I have a tablet.If we want to have a meeting，I can send the invitation online.
练习设计
请完成本课对应训练！第三课时 Lesson 21 Books or Computers？
课时目标
重点单词 press n．印刷机；新闻界appear v．出现；呈现；来到modern adj.现代的；新式的electronic adj.电子的sell v．卖；出售
重点短语 pass on传递；前进change the world改变世界keep on继续by hand用手；手工printing press印刷机
重点句子 1....and people passed on their knowledge by telling stories.……人们通过讲故事来传播知识。2．They wrote each word by hand.他们用手来写每个单词。3．Then，the printing press appeared and changed the world.然后，印刷机出现了并改变了世界。4．With modern technology，it was possible to print books quickly.现代技术的运用使得快速印刷书变得可能。5．No matter what you have，a computer，a tablet，a laptop，an e－reader or a real book，keep on reading! 不管你有什么，一台电脑、一个平板电脑、一个笔记本电脑、一个电子书或者一本纸质书，坚持阅读！
教学难点 能够使用目标语言说一说书的发展历程；知道印刷术和网络的重要性
自主学习
一、用方框中所给单词或短语的适当形式填空(每个单词或短语限用一次)。
1．Tom was very excited when his mother appeared in front of him.
2．Many people like the new book，so it sells very well.
3．E－books mean electronic books.
4．I have five paintings of modern art on the wall of my room.
5．He passed on the news to others in his company this morning.
6．Linda's mother often makes dresses by hand.
二、写出下列画线短语的汉语意思。
1．...and people passed_on their knowledge by telling stories.传递
2．They wrote each word by_hand.用手；手工
3．Then，the printing_press appeared and changed the world.印刷机
4．No matter what you have，a computer，a tablet，a laptop，an e－reader or a real book，keep_on reading! 坚持
教学过程
环节1 新课导入
T：Look at these pictures，do you know what they are
Ss：They are paper/real books and electronic books.
T：Which kind of book do you often read，a paper book or an e－book Why
S1：I often read a paper book.Because it can protect my eyes.
S2：Me too.
S3：I often read an e－book.Because it's convenient to carry wherever I go.
...
T：OK.Today we will learn more about books and computers.
设计意图：通过展示图片让学生观察并提出与他们生活相关的问题来吸引学生的注意力，活跃课堂氛围，为接下来的学习做好铺垫。
环节2 新课学习
1．让学生结对讨论教材第54页上方“THINK ABOUT IT”的两个问题，然后邀请几名学生说出自己的看法。
2．让学生仔细阅读文章并勾画出文中的重点单词、短语及句子，然后教师进行一一讲解(教师可邀请学生试着翻译一些句式较为复杂的句子)。
3．让学生浏览活动1的三个问题，然后带着这三个问题去扫读文章。教师请几名学生分享自己的答案，然后订正答案。
4．让学生完成活动2的练习，教师请学生分享自己的答案，然后核对答案。
5．让学生回顾文章内容并完成活动3的练习。教师请三名学生朗读整段话(对发音有误的地方教师要及时纠正)，然后教师核对答案。
6．结对练习。让学生和同桌编一个关于喜欢阅读纸质书还是电子书的对话并说明其原因。
7．教师邀请几组学生当堂表演对话，并予以点评。
8．要点点拨。
(1) ...and people passed on their knowledge by telling stories.
pass on传递。例：What sort of value do you want to pass on to the next generation？你想把什么样的价值观传递给下一代？
(2)Then，the printing press appeared and changed the world.
①printing press 印刷机
②appear vi.出现；呈现；来到。例：A woman appeared at the far end of the street.一个女人在街那端出现了。
(3)With modern technology，it was possible to print books quickly.
It is/was＋ adj.＋ to do sth.做某事是……的。(it作形式主语，真正的主语是to do sth.)例：It is very interesting to learn English.学英语很有趣。
【拓展】①若形容词是描述不定式行为者的性格、品质的，如kind、good、nice、right、wrong、clever、careless、polite、foolish等，用of sb.引出动作的发出者。例：It's very kind of you to help me.你帮助我真是太好了。
②若形容词是描述事物性质和特征的，用for sb.引出动作的发出者，这类形容词有difficult、easy、hard、important、dangerous、impossible等。例：It's very difficult for me to get up early in the morning.早上早起对我而言很困难。
9．学以致用。(汉译英)
(1)你想让我帮你传递信息吗？
Do you want me to help you pass on the message
(2)当她看见她的好朋友出现在她的面前时，她感到非常的兴奋。
When she saw her good friend appear in front of her，she felt very excited.
(3)你对别人大吼是不礼貌的。
It's impolite of you to shout at others.
设计意图：通过让学生扫读和精读相结合的方式提升学生的阅读能力，并且通过相应的练习题来加深对文章的理解；通过和同桌编对话的形式，激发学生的学习兴趣，使课堂充满活力。
板书设计
Unit 4 The Internet Connects UsLesson 21 Books or Computers？
pressappearmodernelectronicsellpass onchange the worldkeep onby handprinting press ...and people passed on their knowledge by telling stories.Then，the printing press appeared and changed the world.With modern technology，it was possible to print books quickly.
练习设计
请完成本课对应训练！
