高中英语人教版 (2019)必修 第二册Unit 3 The internet教学ppt课件

这是一份高中英语人教版 (2019)必修 第二册Unit 3 The internet教学ppt课件，共20页。PPT课件主要包含了Leading-in，Part1，Leading in，Verb form，Part2，Practice，Part3等内容，欢迎下载使用。

While-class
After-class
1. Jan’s life has been greatly imprved by the Internet.The Internet has greatly imprved Jan’s life.2. Much has been written abut the wnders f the Wrld Wide Web.Peple have written much abut the wnders f the Wrld Wide Web.
Underline and cmpare the different verb frms.
Active __________________
Passive _________________
The frm f the present perfect passive vice
have/has +v-ed
have/has been +v-ed
现在完成时的被动语态1 构成肯定式：have/has + been dne否定式：have/has nt + been dne一般疑问式：Have/Has + 主语 + been dne?特殊疑问式：疑问词 + have/has（+ 主语）+ been dne?A lt f factries have been set up since last year.自从去年以来，已经建立了许多工厂。 I can’t see any cffee in this cupbard. Has it all been finished?我看不见这碗柜里有咖啡。都喝完了吗？
2 用法（1）表示一个被动的动作在说话之前已完成，强调过去的动作对现在造成的影响或结果，通常与 already，yet，just，never，recently 等副词连用。I gt caught in the rain and my suit has been ruined. 我被雨淋了，衣服全毁了。His brther has been fired by the cmpany recently. 他弟弟最近被公司解雇了。（2）表示一个被动的动作或状态从过去开始一直持续到现在，常与fr 或 since 引出的时间状语连用，或用于 hw lng 引出的句子中。A great many machines have already been prduced by the factry since the technlgical revlutin. 自从技术革命以来，这家工厂已经生产了许多机器。（3）用在时间或条件状语从句中，表示将来已完成的被动动作，即用现在完成时的被动语态代替将来完成时的被动语态。She will leave fr the cinema as sn as the applicatin frm has been cmpleted. 申请表一填好，她就去看电影。
【学法点拨】常与现在完成时连用的时间状语：already 已经 yet 已经recently/lately 最近 since then 从那时起ever since 自那以来 ever 曾经s far 迄今为止 fr a lng time 很长一段时间by nw 到现在为止 in recent years 在最近几年里in/during/ver the past/last few years 在过去的几年里Their new cars have been advertised n the Internet fr a lng time.他们的新车在网上做广告已经很长时间了。
3 注意事项（1）与一般过去时的被动语态的区别（2）brrw，begin，start，buy，marry，pen，jin 等非延续性动词的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，需要改变动词或时态。这本书借了一周了。The bk has been brrwed fr a week. （×）The bk has been kept fr a week. （√）这个工程已经开始多久了？Hw lng has this prject been started? （×）Hw lng ag was this prject started? （√）
【学法点拨】非延续性动词的否定式可表示动作的持续过程，具有持续性，因而可与 since 或 fr 引出的时间状语连用。（3）带有双宾语的动词，如 give，send，bring，take，teach，shw，tell，make，sing，write，sell，buy，lend，ffer，hand，pass，get 等，变为被动语态时，一般是把指人的间接宾语变为主语。如果将直接宾语变为被动句的主语，间接宾语前要加 t 或 fr。We have been tld the time f the lecture.我们已被告知讲座的时间。The traffic rules have been taught t him many times，but he still ignred them. 交通规则已经教过他很多次了，但他仍然无视。
（4）带有复合宾语（宾语 + 宾语补足语）的动词变为被动语态时，只能将宾语变为主语，原来的宾语补足语保持不动。主动语态中不带 t的不定式作宾补，在被动语态中要加上 t。The wrkers have been made t wrk a whle day withut stp.工人们被迫不停地干了一整天。
（5）短语动词变为被动语态时，要注意保持短语动词的完整性，不可漏掉动词后面原有的介词或副词。此类短语动词有：① 动词 + 介词refer t，lk after，call n，rely n，lk fr，lk at，listen t，dream f，meet with，laugh at，result in，wait fr，deal with，perate nThese cases have been referred t in the expert’s reprt.专家的报告中提到了这些案例。
② 动词 + 名词 + 介词pay attentin t，make use f，take part in，keep an eye n，make fun f，catch sight f，take a nte f，take care fThe pr by has been made fun f in the public fr many times.这个可怜的男孩在公共场合被取笑了很多次。
③ 动词 + 副词turn n，turn ff，carry n，carry ut，think ver，make up，set up，put dwn，hand in，pint ut，call upSeveral specialized hspitals have been set up t help cure the patients f the terrible disease.已经建立了几家专科医院来帮助治疗这种可怕疾病的病人。
Change the sentences int the present perfect passive vice.ExampleThey have built a kind f new PC with mre functins.→A kind f new PC has been built with mre functins.1. I have dwnladed the sftware t help my phne battery last lnger.2. Smene has lst an identity card.3. Have yu cnfirmed the Wi-Fi passwrd?4. Have yu pressed the buttn yet t cpy the file?5. Has anyne made a cmment abut the nline database?
1. I have dwnladed the sftware t help my phne battery last lnger.2. Smene has lst an identity card.3. Have yu cnfirmed the Wi-Fi passwrd?4. Have yu pressed the buttn yet t cpy the file?5. Has anyne made a cmment abut the nline database?
The sftware has been dwnladed t help my phne battery last lnger.
An identity card has been lst.
Has the Wi-Fi passwrd been cnfirmed?
Has the buttn been pressed yet t cpy the file?
Has a/any cmment been made abut the nline database?
What are the differences in meaning and functin between the active and passive frms?
The bject in an active sentence becmes the subject in a passive sentence. Bth sentence types cnvey a similar meaning, but they are slightly different. Active sentences are used ften, as they are mre direct. Passive sentences are ften used when the der f an actin is unknwn, nt imprtant, r preferred nt named.