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 TUnit 3 Thehe I InternetnternetDiscovering Useful Structure现在完成时的构成现在完成时的构成现在完成时的概念现在完成时的概念现在完成时的被动语态现在完成时的被动语态被动语态的注意事项被动语态的注意事项1 12 23 34 4ContentsContents现 在 完 成 时 的 构 成现 在 完 成 时 的 构 成PART 01PART 01现在完成时的构成现在完成时的构成have/has+done当主语是当主语是_用用hashas 当主语是当主语是_用用havehavedonedone在现在完成时中叫在现在完成时中叫_，

2、原型是原型是do/doesdo/does第三人称单数第三人称单数其他人称其他人称过去分词过去分词现 在 完 成 时 的 概 念现 在 完 成 时 的 概 念PART 02PART 02 forfor:后接一段时间后接一段时间，如，如three years,a long timethree years,a long timee.g.I have known you e.g.I have known you for for a long timea long time.sincesince:自从自从 后接过去的时间点后接过去的时间点/动作动作e.g.I have not seen him e.g.

3、I have not seen him since since we met we met last week.last week.AB常用的时间状语有：“forfor”and“”and“sincesince”for+for+时间段时间段 (译为：译为：时间时间)The door is not closed now.）常与连用，如:these days,up to now,by now,lately,already,never,ever,just,yet,these days,up to now,by now,lately,already,never,ever,just,yet,before,

4、recently,so far,in the before,recently,so far,in the past few yearspast few years等never,twice,three times,many timesnever,twice,three times,many timesIt is the first/second time that.It is the first/second time that.等等常用的时间状语有：常用的时间状语有：1 12 2已经已经/刚刚刚刚already，yet，just从不从不/曾经曾经/之前之前never/ever/before 自

5、从自从since+过去的过去的时间时间点点for+一段时间一段时间一段时间以来一段时间以来in the last few days.in the past few years最近，近来最近，近来lately,recently,in recent years到目前为止到目前为止so far,up to now,by now，to date，until/till now次数次数twice；several timesIt is the first/second time that.现在完成时态常见的时间状语现在完成时态常见的时间状语现在完成时的结构形式现在完成时的结构形式现在完成时(Active V

6、oice)肯定式 have/has done否定式 have/has not done一般疑问句 have/has+主+done？特殊疑问句 疑问词+have/has+主+done？13Translate them into English.1.你以前做过风筝吗你以前做过风筝吗?2.2.我从来没有见过这么奇怪的人我从来没有见过这么奇怪的人3.3.到目前为止你学了多少英语单词到目前为止你学了多少英语单词?4.4.这部电影他已经看过这部电影他已经看过5 5遍了遍了.5.5.最近有没有读一些有趣的书最近有没有读一些有趣的书?6.6.自从她搬到上海以后自从她搬到上海以后,我就没见过她我就没见过她.Ha

7、ve you made a kite before?Ive never seen such a strange man.How many English words have you learned so far?He has already seen this film 5 times.Have you read any interesting books recently?I havent met her since she moved to Shanghai.现在完成时的被动语态现在完成时的被动语态PART 03PART 03PART 02PART 02（1）Toms novel has

8、 not been published.（2）The experiment has been done 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:_2否定形式为否定形式为:_3一般疑问句式为：一般疑问句式为：_4特殊疑问句式为：特殊疑问句式为：_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

9、+主语主语been doneThe first subway to cross the Yangtze River_ .第一条横穿长江的地铁已经开工。(肯定式)When and where to spend our holiday_yet.我们还没决定何时去何地度假。(否定式)_ the construction of the underwater tunnel _?水下隧道的建造完工了吗?(一般疑问式)_ parts of Gansu Province _ by strong winds and heavy snowfall in the past two days?在过去的两天里,甘肃省的

10、什么地方受到了大风和大雪侵袭?(特殊疑问式)has been startedhasnt been decided Has been finished What have been hit 被动语态的注意事项被动语态的注意事项PART 04PART 04Eg：Great changes have been taken place in my hometown recently.Eg:After the traffic accident,no one was survived except a person who was badly injured.1.不及物动词和不及物动词短语，没有被动语态不

11、及物动词和不及物动词短语，没有被动语态，rise,happen,take place,break out,come about,survive,remain,last,die,disappear,end,fail,belong to,consist of.2.虽然一般说来只有及物动词才有被动语态，但许多虽然一般说来只有及物动词才有被动语态，但许多“不及物动词不及物动词+副词或介词副词或介词”构成的短语动词，相当于及物动词，也可以有被动语态，但变被动语态后，不可构成的短语动词，相当于及物动词，也可以有被动语态，但变被动语态后，不可把介词或副词漏掉。把介词或副词漏掉。laugh at,operat

12、e on,listen to,look after,take care of,think of,talk about,hand in,catch sight of,make use of,pay attention to,turn on Eg：My sister will be taken care of by grandma.The patient is being operated on now.The radio was turned on by him just now.e.g.这本书借了一周了。这本书借了一周了。The book has been kept for a week.这辆

13、自行车我买了一年了。这辆自行车我买了一年了。I have had this bike for a year.The bike has been had for a year.3.borrow,begin,start,buy,marry,open,join等非延续性动词的现等非延续性动词的现在完成时的被动语态在完成时的被动语态不能与表示一段时间的状语连用不能与表示一段时间的状语连用。若要表达。若要表达相应的意思，需要改变动词或时态。相应的意思，需要改变动词或时态。1、一般现在时：is/am/are+done Our classroom is cleaned every day.我们教室每天都被打

14、扫。2、一般过去时：was/were+done A new shop was built last year.去年修了一座新商店。3、一般将来时的被动语态构成：will+be done A new hospital will be built in our city.我们城市将要修建一家新医院。4、现在进行时的被动语态构成：am/is/are+being done My bike is being repaired by Tom now.王叔叔正在修理我的自行车。5、过去进行时的被动语态构成：was/were+being done The new road was being made.这条新

15、路正在修筑。6、现在完成时的被动语态构成：has/have+been done This book has been translated into many languages.这本书被翻译成多种文字。7、过去完成时的被动语态构成：had+been done The claasroom had been cleaned before the teacher came.各种时态的被动语态各种时态的被动语态1.When you get the papers back,pay special attention to what (mark).2.In recent years many sport

16、s clubs (run)to make a profit.3.I want to buy this kind of cloth because I (tell)that the cloth washes well.4.Over the past ten years,this town (hit)twice by earthquakes.has been marked have been runhave been told has been hit 5.A lot of damage (cause)by a snowstorm which hit the north of the countr

17、y last night.6.I like these songs very much which (teach)recently on the radio.7.When and where our professor will give us a lecture_(not decide)yet.8.Great changes (take)place in my hometown since 2016.has been caused have been taught hasnt been decidedhave taken 9.（已经证实）that it was the drivers car

18、elessness that resulted in the terrible accident.10.In recent years，stress _(regard)as a cause of a whole range of medical problems.11.It is the first time that music therapy_(introduce)into treating depression.12.Never in my life _I ever been touched by such a song.13.All the preparations for the t

19、ask _(complete),and we re ready to start.14.Numerous measures _(take)to cope with these problems by the government up to now.It has been confirmed that has been regardedhas been introducedhave been completedhavehave been takenComplete the notice with the correct forms of the verbs in brackets.(WORKB

20、OOK P75 EX.4)Notice to parentsDear Parents,We hope you will welcome this news.Almost 100 computers_（give)to us by a local computer company since the end of last year.A decision_（make)to begin a computer teaching experiment at our school.Our plan _（support)with technical equipment and advice which_（p

21、rovide)by the City Information Technology Centre.Every teacher_（provide)with a laptop since the beginning of this term.More recently,most of our courses _（teach)using computers.We _（help)in our teaching by a lot of information from the Internet.Also,a new computer room _(set up)in our school.We hope you will be happy with this exciting new development in our school.have been givenhas been madehas been supportedhas been providedhas been providedhave been taughthave been helpedhas been set up