1、Unit 3The InternetDiscovering Useful Structures一、现在进行时被动语态一、现在进行时被动语态（一）构成（一）构成 1.肯定形式肯定形式 2.否定形式否定形式（二）用法（二）用法1.表表示说话时正在进行的被动动作；示说话时正在进行的被动动作；2.表表示现阶段正在进行的被动动作；示现阶段正在进行的被动动作；3.表表示一种示一种经常性经常性的被动行为，带有感情色的被动行为，带有感情色彩。彩。is/am/are being doneis/am/are not being done1.The Present Perfect tense(现在完成时)prese
2、nt(now)futurepast Present Perfect Tense 现在完成时现在完成时(1)主语主语+have/has+V-过去分词过去分词(done)助动词助动词,无意义无意义 一：现在完成时的结构一：现在完成时的结构Winter has already come(came,come)，will it still be far in spring?注：主语若是注：主语若是第三人称单数第三人称单数助动词用助动词用 hasYou _have_ planted all the trees.I _have_ planted all the trees.He/she _has_ plan
3、ted all the trees.They _have_ planted all the trees.练习：区别练习：区别have 和和 has的用法的用法 主语若是第三人称单数助动词用主语若是第三人称单数助动词用 has现在完成时与现在完成时被动语态的动词形式现在完成时与现在完成时被动语态的动词形式P30页页Ex1.找出找出下面句子的下面句子的谓语谓语结构，哪些是结构，哪些是主动主动？哪些是？哪些是被动被动？1.Jans life has been greatly improved by the Internet.2.The Internet has greatly improved Ja
4、ns life.3.People have written much about the wonders of the World Wide Web.4.Much has been written about the wonders of the World Wide Web.被动被动主动主动主动主动被动被动 verb form activepassivehave/has donehave/has been done一、观察例句，归纳现在完成时被动语态的构成。（1）Toms novel has not been published.（2）The experiment has been done
5、 successfully.（3）How long has this film been shown?（4）Has his bike been repaired?现在现在完成完成时时的被动语态的被动语态1.肯定形式为肯定形式为:_。如句如句(2)。2否定形式为否定形式为:_。如句如句(1)。3一般疑问句式为：一般疑问句式为：_。如句。如句(4)。4特殊疑问句式为：特殊疑问句式为：_。如句。如句(3)主语主语+have/has been done主语主语+have/has not been doneHave/Has主语主语been done疑问词疑问词have/has+主语主语been done
6、现在完成时被动语态现在完成时被动语态二二.Change the sentences into the present perfect passive voice.Theyve built a kind of new PC with more functions.A kind of new PC has been built with more functions.EXAMPLEI have downloaded the software to help my phone battery last longer.Someone has lost an identity card.The soft
7、ware has been downloaded to help my phone battery last longer.An identity card has been lost.Have you confirmed the Wi-Fi password?Have you pressed the button yet to copy the file?Has anyone made a comment about the online database?Has the Wi-Fi password been confirmed?Has the button been pressed ye
8、t to copy the file?Has a/any comment been made about the online database?Find out the differences in meaning and function between the active and passive forms.1.The problem has been discussed for 2 days.2.Many new buildings have been built in the past few years.3.Two novels have been written by him
9、so far.4.The computer has been used every day since I bought it.5.The dirty clothes have already been cleaned.三、现在完成时被动语态用法三、现在完成时被动语态用法（一）找出表示时间状语的词语并总结用法。（一）找出表示时间状语的词语并总结用法。表示一个被动的动作或状态表示一个被动的动作或状态从过从过去开去开始一始一直持续到现在直持续到现在，常连，常连用的时间状语有：用的时间状语有：for+段时间，段时间，since+时间状语时间状语(从句从句)，these days,so far,up
10、to now,in the last/past few years等等,总结如下总结如下.常与现在完成时连用的时间状语：already 已经(肯定句)yet 已经（否定句或者疑问句）recently/lately 最近 since then 从那时起ever since 自那以来 ever 曾经so far 迄今为止 for a long time 很长一段时间by now 到现在为止 in recent years 在最近几年里in/during/over the past/last years在过去的几年里即即学即练：学即练：1.This class_(teach)by Mr.Brown
11、for two years.2.His Chinese_(improve)a lot since he came to China.3.Rowlings novels_(translate)into many foreign languages so far.have been taught has been improvedhave been translated（二）表（二）表某某被动动作对现在造成的影响或结果被动动作对现在造成的影响或结果，常与，常与already,yet,just,ever,never,recently等连用等连用。即学即练：即学即练：The bike_(not rep
12、air)yet.I _ already_(introduce)to Mr.Smith.注注意：意：有些动词没有被动语态有些动词没有被动语态,如不及物动词如不及物动词happen,take place,break out等。等。1.Great changes _(take)place in my hometown in the past ten years.has not been repaired havebeen introduced have taken现在完成时被动语态的解题步骤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
13、主主：主语与动词构成被动关系：主语与动词构成被动关系；3.定定谓谓：确定谓动形式：确定谓动形式：have/has(not)been done。一.单句语法填空 1Their new house _(decorate)for two months and they will settle in it in the near future.2Their new cars _(advertise)on the Internet for a long time.3All the athletes _(select)from millions of people all over the country
14、 in the past two months.4Great changes _(take)place in my hometown in the past ten years.5.She _(return)this book to the library already.has been decoratedhave been advertisedhave been selected have takenhas returned 二、单选题()1.Despite the previous rounds of talks，no agreement _so far by the two sides
15、.Ahas been reached Bwas reached Cwill reach Dwill have reached()2.It is the most instructive lecture that I _ since I came to this school.Aattended Bhave been attended Cam attending Dhave attended()3.In the last few years thousands of films _all over the word.Ahave producedBhave been produced Care p
16、roducing Dare being producedADB()4.Look!A new library _ in the center.Ais being builtBis built Cis buildingDbuilding()5.We wont start the work until all the preparations _.Aare being made Bwill be made Chave been made Dhad been madeAC了解：现了解：现在完成时和现在完成进行时的区别在完成时和现在完成进行时的区别现在完成时：现在完成时：事情发生在过去事情发生在过去,并
17、一直持续到现在。或过去发生的动作对现并一直持续到现在。或过去发生的动作对现在有一定影响。在有一定影响。句式结构句式结构:主语主语+have/has+done现在完成进行时：现在完成进行时：表示从过去开始一直持续到现在的动作表示从过去开始一直持续到现在的动作,强调这个动作可能会继强调这个动作可能会继续下去续下去.句式结构句式结构:have/has been doing1.-Excuse me,which movie are you waiting for?-The new Star Wars,We _ here for more than two hours.A.waited B.wait C.
18、would be waiting D.have been waiting2.Marty _ really hard on his book and he thinks hell have finished it by Friday.A.worked B.has been workingC.had workedD.has workedDB一、含义：1、表示动作发生在过去、表示动作发生在过去,到现在到现在已经已经完成或对现在产生的影响完成或对现在产生的影响。2、动词、动词和被修饰主语构成被动关系。和被修饰主语构成被动关系。二、构成：肯定式：肯定式：have/has been done否定式：否定式：have/has not been done一般疑问句：一般疑问句：Have/Has+主语主语+been done?特殊疑问句：特殊疑问句：疑问词疑问词+have/has+主语主语+been done?三、解题步骤1.找时找时 2.圈主圈主 3.定谓定谓
