Unit 3 Discovering Useful Structures 现在完成时被动语态（ppt课件）(3)-2023新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 TheUnit 3 The InternetInternet现在完成时的被动语态 Discovering Useful StructuresEnjoyEnjoy!You have slain an enemy.Your team has destroyed the turret.slay slew-slainhave/has donehave/has been doneAn ally has been slain.An enemy has been slain.You have been slain.Your turret has been destroyed.现在完成时现在完成

2、时的被动语态防御塔 杀死敌人盟友slay-slain-slainYou an enemy.An enemy by you.have slainhas been slain主语主语谓语谓语宾语变主语宾语变主语句首大写句首大写谓语have/has done之间加之间加been注意单复数注意单复数主主语变语变宾宾语语放在放在by 后边后边宾语宾语 by your team.the turret.has destroyed Your teamThe turret has been destroyed宾语宾语主语主语谓语谓语have finished .my homeworkIMy homeworkby

3、 mehas been finished宾语宾语现在完成时主动变被动的解题步骤现在完成时主动变被动的解题步骤1.一一找找：找主动语态的主谓宾：找主动语态的主谓宾2.二二变变：宾变主，主变宾：宾变主，主变宾3.三三改改：把谓语动词由主动改为被动：把谓语动词由主动改为被动：have/has done(not)been 现在完成时的被动语态肯定式就是：现在完成时的被动语态肯定式就是：主语主语+have/has+been+V-过去分词过去分词The classroom has been cleaned.The windows have been cleaned.The desks have been

4、placed neatly.The pictures have been put up on the wall.Some pictures have been drawn on the blackboard.The tools have been placed neatly.整齐地整齐地activity 2第二届高中、中职学科教师微课大赛We are trying to make our hometown a civilized city.Great changes have taken place in Shiyan.plant more treesThe street has been w

5、idened.widen the streetMore trees have been planted.第二届高中、中职学科教师微课大赛beforebeforeafterGarbage sorting has been adopted in every neighborhood.adopt garbage sorting采用垃圾分类第二届高中、中职学科教师微课大赛The outside walls have been painted.paint the outside wallsfix new sports equipmentNew sports equipment has been fixe

6、d.不可数第二届高中、中职学科教师微课大赛set up a new bridgeA new bridge has been set up to make it more convenient to cross the street.第二届高中、中职学科教师微课大赛built a new hospitalA new hospital near our school has been built.add the walking trails set up a new squareThe walking trails have been added along the river.A new squ

7、are has been set up to make life more colorful.步行道步行道当堂检测当堂检测(10)Great changes have taken place in my hometown in the past few decades.The public facilities(设施设施)_ (improve)so far.Many roads_(wide).Besides,More attention _(give)to the environmental protection,so many trees and flowers are being plan

8、ted now.The water in the rivers as well as the air has become clean again.As many people say,It seems that we are now living in a“big park”.However,things can get bad if we dont appreciate what we have now.have been improved have been widenedhas been given即学即练即学即练1.I have asked her to help you.将下列主动

9、句变为被动句将下列主动句变为被动句2.They have found a good place to build a library in the city.3.We have planted many trees on the hill in the last two years.She has been asked by me to help you.A good place has been found by them to build a library in the city.Many trees have been planted by us on the hill in the

10、last two years.Activity 3 学以致用之句子层面学以致用之句子层面Discovering Useful StructuresRead the poem.Look at the way your face has been washed Look at the way your teeth have been brushed Look at the way your shoes have been cleaned Youd better do them again.的方式的方式Look at the way the flowers have been planted Loo

11、k at the way the grass has been cut Look at the way the paths have been swept I hope that youll come here again.Think of your own situation and write a similar poem.Pair workShare your poem with your partner!Pair workSampleI hope that youll come to our classroom again.The children have already been

12、told(tell)the good news.Have the children been told the good news yet?Who has been told the good news yet?否定句：否定句：The children have been told the good news yet.一般疑问句：一般疑问句：特殊疑问句特殊疑问句（对划线部分提问）：（对划线部分提问）：按要求改变句式挑战升级挑战升级haventnot The letter (post)already.Observe the following sentences and try to fill

13、in the blanks.has been posted Many houses (build)for the poor so far.have been built注意注意:时间状语时间状语用法用法1:被动动作发生在过去被动动作发生在过去,已经完成已经完成,对现在造成影响或产生结果。对现在造成影响或产生结果。(常与常与already,yet,just so far,by nowever,never,recently等连用等连用。)The machine (repair)for two hours but it still doesnt work.has been repaired Pape

14、r money (use)for over 50 years.has been used用法用法2:被动动作发生在过去被动动作发生在过去,持续到现在持续到现在,并有可能继续持续下去。并有可能继续持续下去。(for+一段时间一段时间;since+时间状语时间状语(从句从句)，these days,up to now,in the last/past few years等等)Understand the structureUnderstand the structure1.Until now,it has been played by over 200 million registered pla

15、yers.2.During the past years,many teenagers have been found overly addicted to it.3.Young peoples minds and bodies have already been consumed and poisoned by their addiction to the game.4.Since 2018,a series of anti-addiction measures have been taken to limit the time and money teens spend on games.

16、5.For a long time,they have not been allowed to log in after 9 pm.Question 1:What time words remind you to use present perfect tense?1.The machine has been repaired already.1.The machine is being repaired now.1.The machine was repaired yesterday.说明动作发生在过去说明动作发生在过去,对现在有影响对现在有影响,“,“现在修好了现在修好了”说明动作正在进行

17、说明动作正在进行只说明动作发生在过去只说明动作发生在过去注意注意:与其它时态区别与其它时态区别2.The baby has been taken good care of.2.The baby has been taken good care.注意注意:动词短语的介词或副词不可去掉动词短语的介词或副词不可去掉3.Great changes have been taken place since 1978.3.Great changes have taken place since 1978.Attention:不及物动词或词组无被动：（不及物动词或词组无被动：（happen、take place、break out、belong to、cost、last）注意注意:不及物动词或词组无被动不及物动词或词组无被动