2021新版北师大版必修第二册英语Unit 4 information technology section ⅳ lesson3 教材讲解.doc

1、Section Lesson 3 1DiscussionDo you think the Internet helps or harms friendships? Why? The_answer_is_open. 2PredictionRead the titles and predict what the blog posts are probably about. The_blog_posts_are_mainly_about_the_relationship_between_the_Internet_and_frien dship. 1First readingRead the two

2、blog posts and find out the topic sentence of each argument. Blog Post One： Argument 1：Talking_online_is_no_replacement_for_facetoface_contact. Argument 2：The_Internet_can_make_people_selfcentered. Argument 3：Online_relationships_may_not_be_what_they_appear_to_be. Blog Post Two： Argument 1：The_Inter

3、net_makes_communication_much_more_convenient. Argument 2：The_Internet_has_also_made_communication_more_fun. Argument 3：Online_communication_can_actually_bring_people_closer_to_each_other. 2Second readingRead the two blog posts carefully and choose the best answer. (1)What enable us to develop lifelo

4、ng friendships? ACommunicating through a screen. BSocial skills developed through direct contact. CTalking online. DAdvice from some parenting experts. (2)Friendships are built on _ Athe basis of trust Bonline communication Conline popularity Dthe number of likes (3)The Internet can develope friends

5、hip through the following Except _ Amaking communication more fun Bbringing people closer to each other Cmaking communication much more convenient Dspending too much time on the Internet (4)Which one is a traditional way of communicating? AA smartphone. BA computer. CA phone call. DA tablet. 答案 (1)B

6、 (2)A (3)D (4)C 3Third readingRead the two blog posts carefully and fill in the form below. Harms Helps Relationship Between Internet and Friendship Communicating through a screen makes it more_difficult for children to concentrate or show kindness to others. You can stay in touch with friends where

7、ver you are or what you are doing. Instead of having proper conversations with their friends， some people are only concerned with their online popularity You can share photos, videos, news stories and websites with your friends online. Going online can be particularly dangerous for people who are ea

8、sily influenced or too trusting. Whenever someone needs help，friends can immediately provide useful suggestions or information. Friends should focus more on face toface communication, and less on online communication. The Internet brings people 10closer and makes communication more convenient. 网络流行词

9、汇 1投票：poll 2引用：quote 3帖子置顶：sticky 4头像：avatar 5签名：signature 6网友见面：user eyeD 7即时通讯(聊天)软件：instant messenger (IM) 8博客圈： blogosphere 9冲浪： surf 10个人资料：personal profile 如何找主题句和支持性细节句 A topic sentence states the general idea or the main point of a text or paragraph.Supporting details give more information a

10、bout that idea. 1Read the text to get a general idea of what it is about. 2Identify one sentence in the text that states this general idea.This is the topic sentence. 3 Read the text again.Look for extra information that supports the topic sentence, e g., examples, reasons.These are the supporting d

11、etails. 语言现象感知 .单词理解 体会句中加黑单词的词性和含义 1Images really cannot replace a reallife smile or hug.adj.现实生活的 2How many“likes” did I get？n.点赞 3In addition, a lot of the content posted on social media is shallow or trivial.vt.发帖子； adj.肤浅的 4Nowadays, your friends are just a click away.n.单击 .词块积累 写出下列词块的含义 1face

12、toface contact 面对面交流 2communicate through a screen 通过屏幕交流 3show kindness to others 与人为善 4lifelong friendships 终生的友谊 5online popularity 网络流行 6maintain healthy relationships 保持健康的关系 7stay in touch with friends 和朋友保持联系 8on the move 在移动中 9bring people closer to each other 使人们更亲近 10provide useful suggest

13、ions 提供有用的建议 Discussing： 1Look at the sentence from Para.2 in the first blog post，“It is these skills that enable us to develop lifelong friendships.” What does “these” refer to? Do you agree with the statement? Why? _The_answer_is_open. 2In the second blog post, what does Eileen KennedyMoore mean w

14、hen she says that online friends“fill holes reallife friends cant”？ Give your reasons. _The_answer_is_open. .句式欣赏 1动名词短语作主语 Communicating through a screen makes it more difficult for children to concentrate or show kindness to others. 2强调句型 It is these skills that enable us to develop lifelong frien

15、dships. 3现在分词短语作状语 Using a smartphone, a tablet or a computer, you can be in contact at home and also when you are on the move. .单词语境记忆根据英汉提示写出单词的适当形式 1He forced himself to focus(关注)his thoughts on work. 2The companys market share is 48 percent(百分比)in the marketplace. 3The true concept of mobile pho

16、nes has disappeared, and now we have smartphones(智能手机) 4Gardening is a very _rewarding(有益的)pastime. 5They put their arms around each other and hugged(拥抱) 6In addition (add) to an album, I gave him a pen and a pencil. 7The argument (argue) among the two parties was blown up by the press. 8Creative (c

17、reate) thinking is the soul and the core of human beings creation activities. 9Lack of cash is a limiting (limit) factor. 10Would you _briefly (brief) introduce yourself? .短语语境填空根据汉语提示写出适当的短语 1Eating too much sugar will do_harm_to/be_harmful_to(对有害) kids teeth. 2We are_ all concerned_with(担心) her sa

18、fety. 3In_addition(另外), he sometimes uses my things without permission. 4In_my_opinion(在我看来), what he said is not true at all. 5People should focus_on(关注)collaborative learning rather than individual learning. .句式语境仿写 1First, talking online is no replacement for facetoface contact. 首先，网上聊天不能代替面对面的接触

19、。 仿写 做早操对你的健康有好处。 Doing_morning_exercises is good for your health. 2Online relationships may not be what they appear to be. 网络关系可能不是看上去的那样。 仿写 他已经成为了他 10 年前想成为的。 He has become what_he_wanted_to_be ten years ago. 3The Internet has also made communication more fun. 互联网也已经使交流变得更加有趣。 仿写 我们将会使我们的国家越来越美丽。

20、 We will make_our_country_more_and_more_beautiful 记单词 .一言串记多义词 The little boy was always working hard to be the focus of the teachers attention.But this time the noise made it hard for him to focus on his study. 这个小男孩总是努力学习想成为老师关注的焦点。但是这次噪音让他无法集中注意力学习。 .词缀助记派生词 1形容词后缀：ing，ive reward(v.)rewarding(adj

21、.) create(v.)creative(adj.) 2名词后缀：tion，age add(v.)addition(n.) percent(n.)percentage(n.) 3副词后缀：ly brief(adj.)briefly(adv.) .合成词一族 percentpercent smartphonesmartphone 句型公式 1动名词短语作主语 2what 引导的表语从句 3“make宾语宾补”结构 1harm vt.& n伤害，损害 harmful adj.有害的 Do you think the Internet helps or harms friendships？(教材

22、P14) 你认为互联网有助于友谊还是有害于友谊？ 合作探究 体会 harm 及其派生词的用法和意义 Your smoking can do harm to/be harmful to the health of your children. 你吸烟会危及孩子的健康。 There is no harm in apologising to him first.先向他道歉没有什么坏处。 It is harmful to your health to drink too much.过量喝酒对你的身体有害。 自主发现 do harm to. 损害 There is no harm in doing st

23、h 做某事是个好主意(或没有坏处) be harmful to 对有害 巩固内化 完成句子 She has got into the bad habit of reading in the bed， which_is_harmful_to/does_harm_to_her_eyes 她养成了在床上阅读的坏习惯，这对她的眼睛有害。 Playing computer games will not only do_harm_to your physical health ， but it is_also_harmful_to your mental health.So there_is_no_har

24、m_in advising you to give it up. 玩电脑游戏不仅对身体健康有害，还对精神健康有害，因此建议你放弃玩电脑游戏是没有害处的。 2replace vt.取代；接替；把放回原处 Firstly，talking online is no replacement for facetoface contactimages really cannot replace a reallife smile or hug.(教材 P15)首先，网上交谈不能取代面对面接触，图像真的无法取代 现实生活中的微笑或拥抱。 合作探究 体会 replace 的用法和意义 It is general

25、ly believed that teachers will never be replaced by/with computers in class.人 们普遍认为课堂上电脑永远不会取代老师。 John is ill and I want to know who is going to take the place of him/take his place.约翰病了， 我想知道谁将代替他。 自主发现 replace sth with/by sth 用替换 take the place of sbtake ones place 代替；替代 巩固内化 (1)单句语法填空 They replac

26、ed their beloved old car with/by an expensive new sports car. (2)同义句转换 No one can replace her father in her heart. No one can take_the_place_of_her_father in her heart. No one can take_her_fathers_place in her heart. 3concentrate vi.专注，专心；集中注意力 concentration n集中；专心 According to a parenting expert, D

27、enise Daniels, communicating through a screen makes it more difficult for children to concentrate or show kindness to others.(教材 P15)据育儿专家丹尼斯丹 尼尔斯说，通过屏幕交流使孩子更难集中精力或善待他人。 合作探究 体会 concentrate 的用法和意义 Playing computer games can give us some relaxation after school, but as students we must concentrate on

28、 our studies. 放学后玩电脑游戏能使我们放松，但是作为学生，我们必须集中精力学习。 He concentrated his mind on studying the history of Loulan. 他专注于研究楼兰的历史。 自主发现 concentrate on (doing) sth 专心(做)某事 concentrate ones mind/attention on 集中注意力于；致力于；专心于 巩固内化 单句语法填空/完成句子 Many firms are concentrating on increasing their markets overseas. The c

29、onfusing matters make him unable to_concentrate (concentrate) on his study. It was up to him to_concentrate_on_his_studies and make something of himself.是否能专 心学习并取得一定成就要靠他自己。 When driving, a driver should concentrate_his_attention_on_the_road 开车时，司机应专注于路况。 4content n内容；目录；容量；满足 adj.满足的；满意的 vt.使满足 In

30、 addition, a lot of the content posted on social media is shallow or trivial.(教材 P15)另外， 在社交媒体上发布的很多内容都是肤浅的和琐碎的。 合作探究 体会 content 的用法和意义 Andy is content with the toy.It is the best he has ever got. 安迪对这个玩具很满意，这是他得到的最好的玩具。 That rich man is tired of city life，so he is content to live in the country. 那位

31、富人厌倦了城市生活，所以他愿意生活在乡下。 We should never content ourselves with book knowledge only. 我们永远不要仅仅满足于书本知识。 自主发现 feel/be content with 对满足/满意 be content to_do sth 满足于做某事 content oneself with 满足于 巩固内化 单句语法填空 The Smiths are content to_live (live)a simple life. She contented herself (her) with what she had achie

32、ved. My friend is quite content with his new job. The contents (content) of his suitcase are doubtful. 1be concerned with 关心 For example，instead of having proper conversations with their friends，some people are only concerned with their online popularityHow many “likes” did I get？(教材 P15)例如，一些人不 再和朋

33、友进行有效地交谈，他们只关心自己网上的人气我得了多少个“赞”？ 短语记牢 记牢下列短语 as/so far as sb/sth be concerned 在某人看来，就某人/某事而言 be concerned about/for 对担心/担忧/焦虑/关心/挂念 concern oneself with/about sth 关心某事，担心某事 As far as Im concerned，its necessary to figure out the cost first. 在我看来，先计算出成本是有必要的。 We should be concerned about their healthbo

34、th physical and mental health. 我们应该关心他们的健康身体健康和心理健康。 巩固内化 单句语法填空/完成句子 The meeting was concerned with reforms and everyone present was concerned about/for their own interests. Generally speaking，grammar is concerned (concern) with the relations between words in sentences. As_far_as_Im_concerned,_its

35、important for us to protect wild animals.在我看来，我 们保护野生动物是重要的。 2in addition 除此之外 In addition, a lot of the content posted on social media is shallow or trivial.(教材 P15)另外， 在社交媒体上发布的很多内容都是肤浅的和琐碎的。 短语记牢 记牢下列短语 in addition to 除之外 add up 把加起来 add sth to sth 把加到/进里 add up to 加起来共计/达(不用于被动语态) add to 增加；增添 a

36、dd that. 补充说 These stoves are of high quality.In addition, the price is low. 这些炉子质量上乘。另外，价格低廉。 Please add some sugar to the milk to make it more delicious. 请在牛奶里加些糖使牛奶更美味。 The engine of the ship was out of order and the bad weather added to the helplessness of the crew. 船的马达失灵了，而且恶劣的天气增加了全体船员的无助感。 H

37、e added that he felt very sorry for not being able to come. 他补充说，他为自己不能来表示歉意。 巩固内化 (1)选词填空：in addition/in addition to In_addition_to the school，the village has a clinic, which was also built with government support. Its too late to go to the basketball match now.In_addition，its going to rain. Aunt M

38、ary gave us sandwiches for our picnic and a bag of cookies in_addition (2)完成句子 His whole school education added_up_to no more than one year. 他所受的全部学校教育加起来不过一年。 The heavy rain added_to the difficulty in rescuing the buried people.大雨增加了营救被掩埋 群众的困难。 3focus on 关注 In my opinion，friends should focus more

39、on facetoface communication，and less on online communication.(教材 P15) 在我看来，朋友们应该更多地关注面对面的交流，少关注在线交流。 短语记牢 记牢下列短语 focus ones attention/eyes/energy on 集中注意力/目光/精力于 the focus of attention 关注的焦点 in focus 焦点对准的；清晰的 out of focus 焦点没对准的；不清晰的 It took her a lot of time to focus on preparing her classes and c

40、orrecting her students homework. 集中精力备课和批改学生的作业花费了她很多时间。 Youd better focus your attention on your studies. 你最好把你的注意力放在功课上。 She always wants to be the focus of attention. 她总是想成为关注的焦点。 The childrens faces are badly out of focus in the photograph. 照片上孩子们的脸模糊不清。 思考 表示“集中精力于；专心于”的常用短语还有哪些？ be_absorbed_in

41、 pay_attention_to devote_oneself_to be_lost_in/lose_oneself_in 巩固内化 (1)单句语法填空 Although the storybook is quite interesting, I have to put it aside and focus my attention on my homework this week. The scientist knows nothing about the matter，because he is always losing himself in scientific study. (2)

42、一句多译 由于他在隔壁唱歌，我不能集中注意力看书。 I cant focus_my_attention_on the book with him singing next door.(focus) I cant be_absorbed_in the book with him singing next door.(absorb) I cant concentrate_(my_attention)_on the book with him singing next door.(concentrate) 1According to a parenting expert, Denise Daniel

43、s, communicating through a screen makes it more difficult for children to concentrate or show kindness to others.(教材 P15) 据育儿专家丹尼斯丹尼尔斯说，通过屏幕交流让孩子更难集中精力或善待他人。 句式解读 句中 makes it more difficult for children to concentrate or show 为 make 复合结构。 其中 it 作形式宾语，真正的宾语是后面的动词不定式。 用法总结 (1)makeit形容词/名词that 从句 Susan

44、 made it clear to me that she wished to make a new life for herself. 苏珊清楚地跟我表明她希望为自己创造新的生活。 (2)makeit形容词/名词to do 不定式 The heavy rain made it impossible for us to go out. 大雨使得我们无法出去。 (3)常用于这种句型的动词还有：think，consider，find，feel 等。 He considered it important for him to learn spoken English well. 他认为学好英语口语对

45、他来说是重要的。 I find it no use arguing with Bill because he never changes his mind. 我发现与比尔争辩没有用，因为他不会改变主意。 巩固内化 单句语法填空/同义句转换 He didnt make it clear when and where the sports meeting would be held. People in the west make it a rule to_buy (buy) Christmas presents for their relatives and friends. I think i

46、t is a good habit to get up early in the morning. I think it_a_good_habit to get up early in the morning. We find that it is easy to get along with him. We find it_easy_to_get_along_with_him 2It is these skills that enable us to develop lifelong friendships.(教材 P15) 正是这些技能才使我们能保持终生的友谊。 句式解读 句中“It is

47、.that”为强调句型。其基本结构为“It is/was被强调部分that/who 其他成分”，本句中被强调部分为 these skills。 用法总结 (1)强调句型的基本结构：It is/was被强调部分that/who句子其他部分。 But rules alone dont secure an orderly society.It is the people who obey the rules that (who) matter. 但是制度本身不能保证一个有序的社会，遵守规则的人才是重要的。 (2)一般疑问句的强调句型：Is/Was it被强调部分that/who句子其他部分？ Was

48、 it three years ago that he went to America for further study? 他是三年前去美国深造的吗？ (3)特殊疑问句的强调句型：疑问词(被强调部分)is/wasitthat句子其他部分？ When was it that you got promoted? 你是什么时候升职的？ (4)not.until.结构的强调句型：It is/was not until.that. It was not until near the end of the letter that she mentioned her own plan. 直到将近信的结尾她

49、才提及了自己的计划。 名师提醒 (1)在强调句型中 It 本身没有实际意义，但不能被其他词代替；被强调部分可以是主语、宾语和状语等； 被强调部分指人时，可用 that/who，其他情况一律用 that。 (2)判断是否是强调句型的方法：把 It is/was 和 that 去掉，看句子的结构及语意是否完整，若完整，则 为强调句型；若不完整，则不是。 巩固内化 (1)单句语法填空 It was only when the car pulled up in front of our house that we saw Lily in the passenger seat. It was at 5 oclock that the visitors finally arrived at Pudong International Airport. Were all the three people in the car injured