2019_20学年高中英语Unit4CyberspaceWarm_upandLesson1Tomorrow’sWorld课件北师大版.pptx

Unit 4 Cyberspace,电脑和网络已经成了我们生活必不可少的一部分。免费的网络随处可得,它们安全吗? All over the world the need for more laptops and computers increases each year.Networks have been part of our life.Probably everyone with a portable device has once logged on to a public WiFi network without paying for it,while they are having a coffee,on a train,in a shopping mall or at a hotel.However,is this kind of public WiFi network safe?,Some networks are better protected than others because encryption(加密)methods are used.Therefore,they are safer than others.But a survey in 2015 showed that more than 950 million records were not protected,including addresses,e-mails,birth dates,phone numbers,passwords and so on.These open WiFi networks are really not safe,because it is very easy for hackers(黑客)to break into the operating system and get peoples private information. Most smart phones and laptops,by themselves,search and connect to WiFi networks.They usually prefer a network with a connection that has been used before.Hackers devices are able to record those searches and look like the trusted WiFi networks.When these smart phones and laptops log on to the networks which are not real,hackers can easily steal their private information.,So next time,when we want to use our laptops or smart phones in public places which offer free WiFi networks,please think it twice or take safe measures before using them. 导读诱思 1.Why do people like to log on to a public WiFi network?,2.What can we learn from the passage about the public WiFi networks?,3.Try to give this passage a title.,答案:Because it is free.,答案:Not all the public WiFi networks are safe.Before we use them,we should think it twice.,答案:Why the public WiFi networks are a possible danger,Warm-up and Lesson 1 Tomorrows World,一,二,三,四,一、根据英文释义和首字母提示写出本课生词 1.o easily sensed,seen or understood 2.c an illegal(非法的) activity 3.a to use violence(暴力)to try to hurt or kill sb 4.c a condition or place of great disorder(混乱) or confusion(混淆) 5.g an increase in size,number,value,or strength 6.c to hit an object,causing damage 7.a to have an influence on 8.d to become impossible to see,obvious,crime,attack,chaos,growth,crash,affect,disappear,一,二,三,四,二、英汉互译 1.find out 2.in the future 3.on the Internet 4.an expert on. 5.because of 6.恶化 7.各种各样的 8.好像 9.对感到悲观/乐观 10.和连接,发现,将来,在因特网上,方面的专家,因为,get worse,all sorts of,as if,be pessimistic/optimistic about.,be connected to,一,二,三,四,三、根据课文内容,选择正确答案 1.From Paragraph One,we know . A.the Internet came into the world in 1980s B.more and more computers will be connected to the Internet C.the Internet grows more rapidly than we can imagine D.people will lose interest in the Internet someday,2.Some experts are pessimistic about the future of the Internet.They are worrying that . A.the growth will slow down B.it will cost people a lot C.the world wont be safe D.the information on the Internet may be wrong,B,C,一,二,三,四,3.Peter Anderson thinks . A.people will be able to work in a virtual world B.television will disappear C.the mail service will disappear D.people cant be able to shop in a virtual shop,4.Which of the following is NOT mentioned in the passage? A.Shopping in a virtual supermarket. B.Studying in a virtual school. C.Getting entertainment from the Net. D.Communicating with others by chatting tools.,A,D,一,二,三,四,四、阅读The Future of Cyberspace,根据所读内容在表格中的空白处填入恰当的单词 注意:每个空格只能填一个单词。,connected,increasing,一,二,三,四,Ideas,crime,attack,一,二,三,四,Ideas,Optimistic,information,entertainment/entertained,disappear,reality,1,2,3,4,5,6,7,8,9,10,1.In a group discussion,I am more likely to. 在小组讨论中,我更可能 考点 likely adj. 有可能的 【高考典句】(2017江苏卷)A great decline in young work force is likely to occur in China,for instance. 例如,青壮年劳动力大量减少的情况可能会发生在中国。 The weather is not likely to clear up for a few days. 几天内天气不大可能会放晴。 It is not likely that he would come at this time of the day. 他不太可能这个时候来。 Women are likelier/more likely to remember their routes using landmarks. 女性更倾向于用地标来记忆她们的行程路线。,1,2,3,4,5,6,7,8,9,10,What do you think is the most likely/the likeliest time to find him at home? 你觉得什么时候最有可能在家里找到他? 归纳 likely在句中可用作表语或定语,用作表语时常接动词不定式或that引导的从句。likely的比较级和最高级有两种形式,分别为likelier,likeliest和more likely,most likely。,1,2,3,4,5,6,7,8,9,10,考点延伸 1阅读下面的句子,体会likely的词性和含义。 We will most likely see him later. 我们很可能晚些时候会见到他。 词性 副词 含义 可能 2辨析:likely,possible和probable It is likely that he is in trouble now. =He is likely to be in trouble now. 他现在很可能遇到麻烦了。 Is it possible to get tickets for the game? 有没有可能拿到比赛的票? Its highly probable that he will take over his fathers business. 他极有可能接手他父亲的生意。,1,2,3,4,5,6,7,8,9,10,归纳 这三个形容词都可表示“可能的”,其可能性的大小顺序为probable(十有八九)、likely(十有六七)、possible(十有三四)。likely可用人或物作主语,常用句式为:It is likely that.或Sb/Sth is likely to.(注意:不能说It is likely for sb to.);probable表示主观上有根据的推测,作表语时不能用人作主语,常用句式为:It is probable that.;possible指客观上潜在的可能性,常带有实际上希望很小的意味,作表语时不能用人作主语,常用句式为:Its possible to./that.。,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,2. .focus mainly on the written text. 主要注意一下文字。 考点 focus vi. 集中注意 focus on 集中于,关注 【高考典句】(2017全国卷)We were respectful of craft and focused on digging into the characters we are going to play. 我们尊重演技,专注于钻研我们所要扮演的角色。 Im so tired that I cant focus (on anything) today. 今天我太累了,精神集中不起来。 By serving others,a person can focus on someone other than himself or herself. 通过服务他人,人们会更多地关注别人而不是自己。,1,2,3,4,5,6,7,8,9,10,考点延伸 1阅读下面的句子,体会focus的含义。 (1)You should focus your attention on your work. 你应该聚精会神地工作。 含义 使集中 (2)If you focus bright sunlight on dry leaves with a magnifying glass,they will start burning. 假如你用放大镜将强烈的阳光聚焦于干叶子上,它们便会燃烧起来。 含义 使聚焦 归纳 focus作及物动词时,也常与介词on连用,构成focus.on.结构,表示“将集中于”。,1,2,3,4,5,6,7,8,9,10,2focus用作名词,意为“焦点,中心”。 The coffee shop is the focus of social life in France. 在法国,咖啡馆是社交生活的中心。 Bring the object into focus if you want a good photograph. 如果你想拍一张好照片,就把焦点对准拍摄主体。,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,3.What other predictions do you know from science fiction books or films that have come true? 你知道还有哪些科幻小说或电影中的预言实现了? 考点 come true (愿望、梦想等)实现 My long-awaited dream came true the minute your father cried,“A girl!” 在你父亲喊出“是个女儿!”的那一刻,我期待已久的梦想实现了。 Carry on,and your dream will come true sooner or later. 继续,你的梦想迟早会实现的。,1,2,3,4,5,6,7,8,9,10,归纳 come true是一个不及物动词短语,它不可用于被动句中,表示“实现梦想”还可用realise ones dream。 I hope his dream of becoming a pianist will come true.=I hope he will realise his dream of becoming a pianist. 我希望他可以实现做钢琴家的梦想。,考点延伸 come about发生 come across偶然遇到,不期而遇 come on(用于催促,鼓励)快点,加油;(用于不相信,不同意或生气)得了吧,算了吧;取得进步,取得进展 come out 出现,显露,结果是;出版,发行(不用于被动语态) come up with想出,提出(想法或计划) when it comes to (doing) sth 谈到(做)某事时,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,4.Peter Taylor finds out how computers and the Internet are going to affect our lives. 彼得泰勒发现计算机和互联网将如何影响我们的生活。 考点一 find out 找出,发现,查明 【高考典句】(2017天津卷)Dont waste your time trying to find out if the receiver has read it yet. 不要把时间浪费在弄清收信人有没有读过信(这件事情)上了。 The teacher was very angry when he found out that the student had been cheating. 老师发现那个学生作弊后,极为气愤。,1,2,3,4,5,6,7,8,9,10,考点延伸 辨析:find与find out Ive found the book you want. 我已找到了你想要的那本书。 Please find out the truth as soon as possible. 请尽快把真相查清楚。 归纳 find意为“找到,发现”,通常表示无意找而发现,可接复合宾语,通常指找到某个具体的东西或人;find out通常指经过努力去“找出,发现,查清”,不能接复合宾语,通常指查明某个真相、发现某种规律等抽象的东西。,1,2,3,4,5,6,7,8,9,10,考点二 affect vt. 影响 The United Nations report says the climate change will affect poor countries more seriously. 联合国报告表明,气候变化对贫穷国家的影响会更加严重。 【高考典句】(2017天津卷)When I was 50,my weight problem began to affect me seriously. 在我50岁的时候,体重问题开始严重影响到我(的生活)。,1,2,3,4,5,6,7,8,9,10,考点延伸 辨析:affect和influence The change in climate may affect your health. 气候的变化可能会影响你的健康。 We became the best friends and he influenced me deeply. 我们成了最好的朋友,而他深深地影响了我。 归纳 affect和influence同义,但affect着重指一时的“影响”,通常指有形的力量造成的物质或生理上的影响;influence则往往指较长时间的、潜移默化的影响。,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,5.In the last thirty years,the Internet has grown rapidly. 近三十年来,互联网发展迅速。 考点 rapidly adv. 快,迅速地 Deer populationmajor food source for the wolfgrew rapidly. 鹿群灰狼的主要食物来源繁衍得很快。 Selecting a mobile phone for personal use isnt easy because the technology is developing so rapidly. 挑选一部个人手机并不容易,因为技术发展得太快了。,1,2,3,4,5,6,7,8,9,10,考点延伸 辨析:rapidly,fast和quickly He was moving rapidly around the house. 他快速地在房屋周围走动着。 This company is fast becoming a major exporter of computer software. 这家公司正快速成为计算机软件的重要出口商。 The summer vacation always seems to go so quickly. 暑假好像总是过得飞快。 归纳 rapidly指运动本身,侧重速度,所指动作可能是短暂的,也可能是持续的;fast常指人或物持续地高速运动,强调运动的方式;quickly指瞬时动作,强调动作敏捷迅速,也指匆忙的行为,而不指速度。,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,5,6,1,2,3,4,7,8,9,10,6.Already,users can buy books,find out about holiday offers,book tickets,and get all sorts of information from the Internet. (互联网)使用者已经可以在网上购书,查找节日特惠,订票,并从网上获取各种各样的信息。 考点 offer n. 特价 The special offer is valid until the end of the month. 这个特价优惠有效期截止到月底。 I bought these cups at the supermarkettheyre on offer this week. 我在超市买的这些杯子它们这周特价出售。,5,6,1,2,3,4,7,8,9,10,考点延伸 1阅读下面的句子,体会offer的含义。 (1)Dont always refuse his offer;you should think it over. 不要总是拒绝他的提议,你应该仔细考虑一下。 含义 提议 (2)Weve decided to accept their offer. 我们决定接受他们的报价。 含义 出价,5,6,1,2,3,4,7,8,9,10,2offer还可用作动词,表示“主动提出,自愿给予;提供,供应”。 【高考典句】(2016天津卷)Our programme offers the full packagestudents are taken good care of from the start through to the very end. 我们提供的课程很完善学生自始至终都得到了良好的照顾。 They offered him a very good job,but he turned it down. 他们给他提供了一份很好的工作,但他拒绝了。,5,6,1,2,3,4,7,8,9,10,6,7,5,1,2,3,4,8,9,10,7.She also believes that,in the future,we will get entertainment from the Net and that television will probably disappear. 她还相信,将来我们可以在网上进行娱乐活动,而且那时电视很可能不复存在。 剖析believe后接两个由that引导的宾语从句,中间用and连接;第一个that后的in the future作时间状语。 考点 disappear vi. 消失 【高考典句】(2017全国卷)By the 1920s,wolves had practically disappeared from the Yellowstone area. 到了20世纪20年代,灰狼几乎已经从黄石公园消失了。 His anger soon disappeared. 他的怒气一会儿就消了。,6,7,5,1,2,3,4,8,9,10,考点延伸 阅读下面的句子,体会disappearance的词性和含义。 At first nobody noticed the childs disappearance. 起初谁都没有注意到小孩不见了。 词性 名词 含义 消失;失踪,6,7,5,1,2,3,4,8,9,10,6,7,5,1,2,3,4,8,9,10,7,8,6,5,1,2,3,4,9,10,8.Some experts see our future in virtual realitythe use of computers with sounds and pictures that make you feel as if you are in a real situation. 有些专家用虚拟现实技术展望未来(虚拟现实)是计算机通过声音和图像模拟现实,以使人感到仿佛置身于一个真实的空间。 剖析 破折号后的内容the use.situation是对our future in virtual reality的解释说明和补充。其中that引导定语从句,修饰sounds and pictures;feel.是省略to的不定式短语,作make的宾语补足语。,7,8,6,5,1,2,3,4,9,10,考点 as if 好像,仿佛 【高考典句】(2017北京卷)Others say we can just “switch them off” as if super intelligent machines are too stupid to think of that possibility. 另一些人说,我们可以“关掉它们”,好像超级智能机器太笨了,想不到这种可能性似的。 The little white wooden house smells as if it hasnt been lived in for many years. 那间白色小木屋散发出来的气味让人觉得那里好像好多年没人住了。,7,8,6,5,1,2,3,4,9,10,考点延伸 1说话人认为句子所述的情况是不真实的或极少有可能发生或存在时,as if从句用虚拟语气。从句虚拟语气动词时态的形式如下: (1)如果从句表示与现在事实相反,谓语动词用过去式。 You look as if you didnt care.你看上去好像并不在乎。 (2)从句表示与过去事实相反,谓语动词用“had+过去分词”。 He talks about Rome as if he had been there before. 他说起罗马来好像他以前去过似的。 (3)从句表示与将来事实相反,谓语动词用“would/could/might+动词原形”。 He opened his mouth as if he would say something. 他张开嘴好像要说什么。 2同义短语:as though,7,8,6,5,1,2,3,4,9,10,7,8,6,5,1,2,3,4,9,10,8,9,7,6,5,1,2,3,4,10,9.It is obvious that this destruction will become more dangerous in the future. 很明显,这种破坏在将来会变得更加危险。 剖析it为形式主语,真正的主语是that引导的主语从句。 考点 obvious adj. 明显的,显而易见的 【高考典句】(2017江苏卷)He tried to hide his