2019_20學(xué)年高中英語Unit4CyberspaceWarm_upandLesson1Tomorrow’sWorld課件北師大版.pptx

Unit 4 Cyberspace,電腦和網(wǎng)絡(luò)已經(jīng)成了我們生活必不可少的一部分。免費的網(wǎng)絡(luò)隨處可得,它們安全嗎? 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. 導(dǎo)讀誘思 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、根據(jù)英文釋義和首字母提示寫出本課生詞 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(混亂) 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、英漢互譯 1.find out 2.in the future 3.on the Internet 4.an expert on. 5.because of 6.惡化 7.各種各樣的 8.好像 9.對感到悲觀/樂觀 10.和連接,發(fā)現(xiàn),將來,在因特網(wǎng)上,方面的專家,因為,get worse,all sorts of,as if,be pessimistic/optimistic about.,be connected to,一,二,三,四,三、根據(jù)課文內(nèi)容,選擇正確答案 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、閱讀The Future of Cyberspace,根據(jù)所讀內(nèi)容在表格中的空白處填入恰當(dāng)?shù)膯卧~ 注意:每個空格只能填一個單詞。,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. 在小組討論中,我更可能 考點 likely adj. 有可能的 【高考典句】(2017江蘇卷)A great decline in young work force is likely to occur in China,for instance. 例如,青壯年勞動力大量減少的情況可能會發(fā)生在中國。 The weather is not likely to clear up for a few days. 幾天內(nèi)天氣不大可能會放晴。 It is not likely that he would come at this time of the day. 他不太可能這個時候來。 Women are likelier/more likely to remember their routes using landmarks. 女性更傾向于用地標(biāo)來記憶她們的行程路線。,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? 你覺得什么時候最有可能在家里找到他? 歸納 likely在句中可用作表語或定語,用作表語時常接動詞不定式或that引導(dǎo)的從句。likely的比較級和最高級有兩種形式,分別為likelier,likeliest和more likely,most likely。,1,2,3,4,5,6,7,8,9,10,考點延伸 1閱讀下面的句子,體會likely的詞性和含義。 We will most likely see him later. 我們很可能晚些時候會見到他。 詞性 副詞 含義 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. 他現(xiàn)在很可能遇到麻煩了。 Is it possible to get tickets for the game? 有沒有可能拿到比賽的票? Its highly probable that he will take over his fathers business. 他極有可能接手他父親的生意。,1,2,3,4,5,6,7,8,9,10,歸納 這三個形容詞都可表示“可能的”,其可能性的大小順序為probable(十有八九)、likely(十有六七)、possible(十有三四)。likely可用人或物作主語,常用句式為:It is likely that.或Sb/Sth is likely to.(注意:不能說It is likely for sb to.);probable表示主觀上有根據(jù)的推測,作表語時不能用人作主語,常用句式為:It is probable that.;possible指客觀上潛在的可能性,常帶有實際上希望很小的意味,作表語時不能用人作主語,常用句式為: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。 考點 focus vi. 集中注意 focus on 集中于,關(guān)注 【高考典句】(2017全國卷)We were respectful of craft and focused on digging into the characters we are going to play. 我們尊重演技,專注于鉆研我們所要扮演的角色。 Im so tired that I cant focus (on anything) today. 今天我太累了,精神集中不起來。 By serving others,a person can focus on someone other than himself or herself. 通過服務(wù)他人,人們會更多地關(guān)注別人而不是自己。,1,2,3,4,5,6,7,8,9,10,考點延伸 1閱讀下面的句子,體會focus的含義。 (1)You should focus your attention on your work. 你應(yīng)該聚精會神地工作。 含義 使集中 (2)If you focus bright sunlight on dry leaves with a magnifying glass,they will start burning. 假如你用放大鏡將強烈的陽光聚焦于干葉子上,它們便會燃燒起來。 含義 使聚焦 歸納 focus作及物動詞時,也常與介詞on連用,構(gòu)成focus.on.結(jié)構(gòu),表示“將集中于”。,1,2,3,4,5,6,7,8,9,10,2focus用作名詞,意為“焦點,中心”。 The coffee shop is the focus of social life in France. 在法國,咖啡館是社交生活的中心。 Bring the object into focus if you want a good photograph. 如果你想拍一張好照片,就把焦點對準(zhǔn)拍攝主體。,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? 你知道還有哪些科幻小說或電影中的預(yù)言實現(xiàn)了? 考點 come true (愿望、夢想等)實現(xiàn) My long-awaited dream came true the minute your father cried,“A girl!” 在你父親喊出“是個女兒!”的那一刻,我期待已久的夢想實現(xiàn)了。 Carry on,and your dream will come true sooner or later. 繼續(xù),你的夢想遲早會實現(xiàn)的。,1,2,3,4,5,6,7,8,9,10,歸納 come true是一個不及物動詞短語,它不可用于被動句中,表示“實現(xiàn)夢想”還可用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. 我希望他可以實現(xiàn)做鋼琴家的夢想。,考點延伸 come about發(fā)生 come across偶然遇到,不期而遇 come on(用于催促,鼓勵)快點,加油;(用于不相信,不同意或生氣)得了吧,算了吧;取得進步,取得進展 come out 出現(xiàn),顯露,結(jié)果是;出版,發(fā)行(不用于被動語態(tài)) come up with想出,提出(想法或計劃) when it comes to (doing) sth 談到(做)某事時,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. 彼得泰勒發(fā)現(xiàn)計算機和互聯(lián)網(wǎng)將如何影響我們的生活。 考點一 find out 找出,發(fā)現(xiàn),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. 不要把時間浪費在弄清收信人有沒有讀過信(這件事情)上了。 The teacher was very angry when he found out that the student had been cheating. 老師發(fā)現(xiàn)那個學(xué)生作弊后,極為氣憤。,1,2,3,4,5,6,7,8,9,10,考點延伸 辨析:find與find out Ive found the book you want. 我已找到了你想要的那本書。 Please find out the truth as soon as possible. 請盡快把真相查清楚。 歸納 find意為“找到,發(fā)現(xiàn)”,通常表示無意找而發(fā)現(xiàn),可接復(fù)合賓語,通常指找到某個具體的東西或人;find out通常指經(jīng)過努力去“找出,發(fā)現(xiàn),查清”,不能接復(fù)合賓語,通常指查明某個真相、發(fā)現(xiàn)某種規(guī)律等抽象的東西。,1,2,3,4,5,6,7,8,9,10,考點二 affect vt. 影響 The United Nations report says the climate change will affect poor countries more seriously. 聯(lián)合國報告表明,氣候變化對貧窮國家的影響會更加嚴重。 【高考典句】(2017天津卷)When I was 50,my weight problem began to affect me seriously. 在我50歲的時候,體重問題開始嚴重影響到我(的生活)。,1,2,3,4,5,6,7,8,9,10,考點延伸 辨析:affect和influence The change in climate may affect your health. 氣候的變化可能會影響你的健康。 We became the best friends and he influenced me deeply. 我們成了最好的朋友,而他深深地影響了我。 歸納 affect和influence同義,但affect著重指一時的“影響”,通常指有形的力量造成的物質(zhì)或生理上的影響;influence則往往指較長時間的、潛移默化的影響。,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. 近三十年來,互聯(lián)網(wǎng)發(fā)展迅速。 考點 rapidly adv. 快,迅速地 Deer populationmajor food source for the wolfgrew rapidly. 鹿群灰狼的主要食物來源繁衍得很快。 Selecting a mobile phone for personal use isnt easy because the technology is developing so rapidly. 挑選一部個人手機并不容易,因為技術(shù)發(fā)展得太快了。,1,2,3,4,5,6,7,8,9,10,考點延伸 辨析:rapidly,fast和quickly He was moving rapidly around the house. 他快速地在房屋周圍走動著。 This company is fast becoming a major exporter of computer software. 這家公司正快速成為計算機軟件的重要出口商。 The summer vacation always seems to go so quickly. 暑假好像總是過得飛快。 歸納 rapidly指運動本身,側(cè)重速度,所指動作可能是短暫的,也可能是持續(xù)的;fast常指人或物持續(xù)地高速運動,強調(diào)運動的方式;quickly指瞬時動作,強調(diào)動作敏捷迅速,也指匆忙的行為,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. (互聯(lián)網(wǎng))使用者已經(jīng)可以在網(wǎng)上購書,查找節(jié)日特惠,訂票,并從網(wǎng)上獲取各種各樣的信息。 考點 offer n. 特價 The special offer is valid until the end of the month. 這個特價優(yōu)惠有效期截止到月底。 I bought these cups at the supermarkettheyre on offer this week. 我在超市買的這些杯子它們這周特價出售。,5,6,1,2,3,4,7,8,9,10,考點延伸 1閱讀下面的句子,體會offer的含義。 (1)Dont always refuse his offer;you should think it over. 不要總是拒絕他的提議,你應(yīng)該仔細考慮一下。 含義 提議 (2)Weve decided to accept their offer. 我們決定接受他們的報價。 含義 出價,5,6,1,2,3,4,7,8,9,10,2offer還可用作動詞,表示“主動提出,自愿給予;提供,供應(yīng)”。 【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. 我們提供的課程很完善學(xué)生自始至終都得到了良好的照顧。 They offered him a very good job,but he turned it down. 他們給他提供了一份很好的工作,但他拒絕了。,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. 她還相信,將來我們可以在網(wǎng)上進行娛樂活動,而且那時電視很可能不復(fù)存在。 剖析believe后接兩個由that引導(dǎo)的賓語從句,中間用and連接;第一個that后的in the future作時間狀語。 考點 disappear vi. 消失 【高考典句】(2017全國卷)By the 1920s,wolves had practically disappeared from the Yellowstone area. 到了20世紀(jì)20年代,灰狼幾乎已經(jīng)從黃石公園消失了。 His anger soon disappeared. 他的怒氣一會兒就消了。,6,7,5,1,2,3,4,8,9,10,考點延伸 閱讀下面的句子,體會disappearance的詞性和含義。 At first nobody noticed the childs disappearance. 起初誰都沒有注意到小孩不見了。 詞性 名詞 含義 消失;失蹤,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. 有些專家用虛擬現(xiàn)實技術(shù)展望未來(虛擬現(xiàn)實)是計算機通過聲音和圖像模擬現(xiàn)實,以使人感到仿佛置身于一個真實的空間。 剖析 破折號后的內(nèi)容the use.situation是對our future in virtual reality的解釋說明和補充。其中that引導(dǎo)定語從句,修飾sounds and pictures;feel.是省略to的不定式短語,作make的賓語補足語。,7,8,6,5,1,2,3,4,9,10,考點 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. 另一些人說,我們可以“關(guān)掉它們”,好像超級智能機器太笨了,想不到這種可能性似的。 The little white wooden house smells as if it hasnt been lived in for many years. 那間白色小木屋散發(fā)出來的氣味讓人覺得那里好像好多年沒人住了。,7,8,6,5,1,2,3,4,9,10,考點延伸 1說話人認為句子所述的情況是不真實的或極少有可能發(fā)生或存在時,as if從句用虛擬語氣。從句虛擬語氣動詞時態(tài)的形式如下: (1)如果從句表示與現(xiàn)在事實相反,謂語動詞用過去式。 You look as if you didnt care.你看上去好像并不在乎。 (2)從句表示與過去事實相反,謂語動詞用“had+過去分詞”。 He talks about Rome as if he had been there before. 他說起羅馬來好像他以前去過似的。 (3)從句表示與將來事實相反,謂語動詞用“would/could/might+動詞原形”。 He opened his mouth as if he would say something. 他張開嘴好像要說什么。 2同義短語: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. 很明顯,這種破壞在將來會變得更加危險。 剖析it為形式主語,真正的主語是that引導(dǎo)的主語從句。 考點 obvious adj. 明顯的,顯而易見的 【高考典句】(2017江蘇卷)He tried to hide his