Unit 3 The Internet Discovering Useful Structures （ppt课件）-2024新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 The InternetTo help the Ss learn the present perfect passive voiceTo guide the Ss to use the present perfect passive voice to do some exercisesapply the present perfect passive voice to interpret the newsaper headlines and creat a poemSTRONGER TOGETHER:HOW WE HAVE BEEN CHANGEDBY THE INTERNETM

2、uch has been written about the wonders of the World Wide Web.There are countless articles telling us how the Internet has made our lives more convenient.We no longer have to wait in line or carry cash around when we go shopping.We can get the most updated information from large databases.We can down

3、load software,documents,and images whenever we need them.But the Internet has done much more for people than simply make life more convenient.Peoples lives have been changed by online communities and social networks.What do they have in common?Much has been written about the wonders of the World Wid

4、e WebPeoples lives have been changed by online communities and social networksShe was so inspired by the people she met online that she decided to start an IT club to teach older people how to use computers and the Internet.She and her friends now organise events and collect money to pay for private

5、 teachers.Many people have been helped by the club.A 59-year-old man learnt how to apply for work online and found a great job.Now that he works and can take care of himself,his daughter has time to study at university.A 61-year-old woman who was living alone has started a small online company toget

6、her with two friends.She no longer feels lonely,and her company has become quite successful.Jans life has been greatly improved by the Internet.“When you go through tough times,you meet others who are facing similar challenges,”Jan says.“Thinking about other peoples situations inspired me to offer h

7、elp.”Many people have been helped by the club Jans life has been greatly improved by the internetThe present Perfect Passive VoiceMuch has been written about the wonders of the World Wide WebPeoples lives have been changed by online communities and social networksMany people have been helped by the

8、clubJans life has been greatly improved by the internet现在完成时的被动语态现在完成时的被动语态Compare the different verb formsJans life has been greatly improved by the internetThe Internet has greatly improved Jans life.Much has been written about the wonders of the World Wide WebPeople have written much about the wo

9、nders of the World Wde WebSimilarities and differences in meaning and function 1212convey asimilarmeaningthe subject is doing an action to the object often used as they are more directthe subject is having something done to itoften used when the doer of an action is unknown,or not important,or perfe

10、rred not named ActivePassiveWhat is Present Perfect tense?present(now)futurepastPresent Perfect Tense 现在完成时现在完成时的结构主语+have/has+V-过去分词(done)助动词,无意义注：主语若是第三人称单数助动词用 hasI have lived in China for 5 years.我在中国住了我在中国住了5年。（从年。（从5年前到现在，现在还在中国）年前到现在，现在还在中国）I lived in China for 5 years.我在中国住了我在中国住了5年。（过去住在中国，

11、现在不在中国）年。（过去住在中国，现在不在中国）过去过去的动作一直的动作一直持续到现在持续到现在 过去过去的动作对现在产生的动作对现在产生影响影响Someone has broken the window.(窗户现在是坏的窗户现在是坏的)I have already lost the key.(我现在没有钥匙我现在没有钥匙)I havent read the book yet.(不了解书的内容不了解书的内容)“三变三变”例：例：They have already solved the problem.原句原句主语主语 by的的宾语宾语宾语宾语 主语主语 谓语谓语由主动由主动 被动被动“三不变三

12、不变”原句原句意思意思不变不变 原句原句时态时态不变不变 原句原句主谓宾以外主谓宾以外成分不变成分不变The problem _ by them.has aalready been solved被动语态被动语态肯定式：肯定式：S+have/has+V-过去分词过去分词(done)否定式：否定式：S+have/has+not+V-过去分词过去分词.一般问句：一般问句：Have/Has+S+V-过去分词过去分词.特殊疑问句：特殊疑问句：疑问词疑问词+have/has+S+V-过去分词过去分词.现在完成时的基本结构现在完成时的基本结构动词形式肯定形式has/have been done Jans l

13、ife has been greatly improved by the Internet.否定形式has/have not been doneThe flower hasnt been watered yet.一般疑问句Has/Have 主语 been done.?Have the apples been eaten up?特殊疑问句What/Who/Where.has/have 主语 been done.?Where have the books been put?现在完成时1)动作或状态从过去开始,一直持续到现在,常与下列时间状语连用:so far,up to now,up till n

14、ow,by now,recently,lately,in recent years;(ever)since+一般过去时,in/during/over the past/last.years/months/days/weeks,over the years1.His first novel has received good reviews since it came out last month.2)动作或状态发生在过去,但对现在有影响或结果2.I got caught in the rain and my suit has been damaged.have/has done have/ha

15、s been done 现在完成时3)固定句型:It/This/That is the first(second,third)time that+现在完成时，表示“第几次做某事”3.This is the first time we have seen a film in the cinema together as a family.have/has done have/has been done 现在完成时态的被动语态的判断句意 强调某一动作/行为从过去某一时间到现在被完成的情况。对应中文的“已经被.了”My mobile apps have been updated.我的手机应用已经被更

16、新了。already 已经 yet 在疑问句和否定句中表示 “尚(未),还(没).”since+时间点 自从.for+一段时间 该行为或结果持续了一段时间 during/over/in+一段时间 在.期间 完成时态的时间标志 never 从来没有 so far,by now,to date,until now,到目前为止 before 以前 recently 最近 all the morning 整个上午 these few days 这些天 现在完成时被动语态的解题步骤1.找时找时：找与现在完成相对应的时间状语：找与现在完成相对应的时间状语；2.圈圈主主：主语与动词构成被动关系：主语与动词构

17、成被动关系；3.定定谓谓：确定谓动形式：确定谓动形式：have/has(not)been done。即时演练即时演练1用现在完成时的被动语态改写句子(1)Jacks boss has always praised him for his devotion to work.Jack _by his boss for his devotion to work.(2)They have found a good place to build a temple in the village.A good place _by them to build a temple in the village.(

18、3)We havent yet decided how to solve that difficult technological problem.How to solve that difficult technological problem _ by us yet.has always been praised has been found hasnt been decided即时演练即时演练2单句语法填空/补全句子(1)Great changes _(take)place in my hometown and you can see that a lot of factories _(

19、set)up.(2)Some efforts _(make)to improve the air quality in the city last winter.(3)Over the past three years,the paintings _(take)to more than 20 museums in the world.have takenhave been setwere madehave been taken(4)For centuries,the ancient language _(pass)on from one generation to another.(5)The

20、 patient _(被照顾得很好被照顾得很好)ever since he came to our hospital.has been passedhas been taken good care of6.The machine (repair)for two hours but it still doesnt work.has been repaired7.Paper money (use)for over 50 years.has been used.语法与写作语法与写作1自从他来帮我，我在学业方面已经取得了巨大进步。Great progress _since he came to my

21、help.2这是我第一次受到同学们的取笑。It is the first time that I _3迄今为止，已经采取了有效措施来保护濒危动物免遭灭绝。So far，effective measures _has been made in my studies have been made fun of by my classmateshave been made to protect endangered creatures from dying outOur art festival _(hold)next month.Recently,many English plays _(try)

22、and we finally choose a short English play.Since then,we _(practice)these days._(know)that you have much experience in English plays,we hope you can give us some advice on it._(tell)the effective way to practice and perform,we still need your further guidance.We _(practice)at the school hall this Th

23、ursday afternoon.We _(appreciate)it very much if you could give us some suggestions.will be heldhave been triedhave been practicingKnowingHaving been toldare going to practicewould appreciate现在现在完成完成时的时的被动被动语态语态含义含义结构结构表示过去发生的被动动作现在已经完表示过去发生的被动动作现在已经完 成或仍将持续成或仍将持续,强调对现在的影响强调对现在的影响have/has been done形式形式肯定式肯定式否定式否定式疑问式疑问式have/has been donehave/has not been doneHave/Has+主语+been done?特殊疑问词+have/has+主语+been done?用法用法表示已经完成的被动动作表示已经完成的被动动作表示开始于过去并可能持续下去的被动动作表示开始于过去并可能持续下去的被动动作在时间状从在时间状从,条件状从中条件状从中,表示还未发生的被动动作表示还未发生的被动动作注意注意事项事项区分区分have/has been done/be being done/be done不及物动词或词组无被动不及物动词或词组无被动