英语人教版八年级下册现在完成时精品ppt课件.ppt

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1、采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Present Perfect Present Perfect TenseTense采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Presentperfecttense现在完成时现在完成时v构成:v用法一：表示过去发生的某一动作对现在造成的影响或产生的结果.现在完成时这一时态强调是过去动作与现在的联系,也就是强调现在的影响和结果.have/has+过去分词采用PP管及配件：根

2、据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物v1.都表示过去发生的事v2.现在完成时强调过去和现在的联系，不能和具体的时间状语连用；v3.一般过去时强调过去发生的事或状态与表示过去的具体时间连用（last,ago,yesterday,etc.）presentpastIhavelivedherefortwoyearsIhavelivedherefortwoyearsIlivedthere2yearsagoIlivedthere2yearsago采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪

3、边旋转，以保证切口面的圆度，保持熔接部位干净无污物 常用于现在完成时的时间副词常用于现在完成时的时间副词,介词介词:already(已经):用于肯定句 yet(已经):用于否定句一般疑问一般疑问(句末）句末）just(谓语动词之谓语动词之前前)（刚刚）（刚刚）,ever(曾经)疑问句疑问句)never(从不)I have never seen him.before(以前)Have you seen the film before?in/duringthe past several days/weeks/years(在过去的)recently(最近)Ihavenotwrittentomypare

4、ntsrecently.so farbynow(到目前为止)So far she has learned 5 English songs.bynow(sofar),up to now(到目前为止)alloneslife,once,twice,this morning/month/year(今天早上/这个月/今年)采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Exercisesv1.I_(have)lunchalready.v2.Hasthetrain_(arrive),yet?v3.Tome_never_(

5、beto)China.v4.Thetwin_just_(see)myfather.v5.Thetwins_(see)myfatherjustnow.v6.Manytallbuildings_(build)inthepast5years.have hadarrivedhasbeen tohasseensawhave been built采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物v用法二用法二：表示过去已经开始，持续到现在的动作或状态，也可以表表示过去已经开始，持续到现在的动作或状态，也可以表示示一直持续到

6、现在并可能还将持续下去一直持续到现在并可能还将持续下去。A A 动词动词使用延续性动词使用延续性动词。B B 和表时间段的时间状语连用。和表时间段的时间状语连用。常与常与for或或since引导的时间连用引导的时间连用sofar,upto/tillnow,inthelast/past+一段时间，一段时间，alloneslife,bynow,thesedays、fortwoyears、since1984、sincehecamehereIhaventseenherthesedays.ShehaslearntEnglishfor3years/since3yearsago.Theyhavelivedh

7、eresince1990.WhathashappenedtotheUSAinthelast350years?采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物注意：注意：(1)since一段时间一段时间agofor时间时间段段;sincetwoweeksago=fortwoweeks;Ihavekeptthelibrarybookforaweek.=Ihavekeptthelibrarybooksinceaweekago.(2)since+时间点时间点for时间时间段段since2000=foryears(3)

8、since+从句从句(常常用一般过去时用一般过去时)TheGreenshavelivedinBeijingsincetheymovedtoBeijingfromParis(4)Itis/hasbeen+一段时间一段时间+since从句从句.自从某事发生已有一段时间了自从某事发生已有一段时间了.Itis/hasbeentwoyearssincemybrotherjoinedthearmy.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物for和和since的运用的运用for“经历经历(时间段时间段)”since

9、“自从自从以来以来”for时间段时间段since时间段时间段agosince时间点时间点since从句从句1.Hehasstayedherefor3hours.2.Hehasstayedheresince3hoursago.3.Hehasstayedheresince3oclock.4.HehastaughtEnglishsincehecamehere.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物练一练：用练一练：用for和和since填空。填空。_three hours_three oclock_two

10、 days_yesterday afternoon_I came here_last Sunday_a week_a long time_1997 _two weeks_three years ago _ last monthforsinceforsincesincesinceforforsinceforsincesince采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物v用用for或或since填空。填空。1.JillhasbeeninIreland_Monday.2.JillhasbeeninIrelan

11、d_threedays.3.MyaunthaslivedinAustralia_15days.4.Margaretisinheroffice.Shehasbeenthere_7oclock.5.Indiahasbeenanindependentcountry_1974.6.Thebusislate.Wevebeenwaiting_20minutes.7.Nobodylivesinthosehouses.Theyhavebeenemptymanyyears.8.Mikehasbeenill_alongtime.Hehasbeeninhospital_October9.Itstenyears_we

12、meteachotherlasttime.10.HehastaughtEnglish_25years.11.TheGreenshavelivedonthefarm_1990.12.Theyhavebeenpracticingtheguitar_twohours.13.Howlonghaveyoubeenareporter?v_8yearsago.14.Ihaventgoneforawalkinthepark_alongtime.15.Hesbeencollectingstamps_hewasinprimaryschool.16.Peterhasbeentosummercamp_3times.采

13、用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物注意点一注意点一:since的用法的用法1.+具体的过去时间具体的过去时间since2008sincesincelastSunday+agosincetwoyearsago+句子句子(过去时过去时)2.Itis/hasbeen+一段时间一段时间+since从句从句.(自从某自从某事发生已有一段时间了事发生已有一段时间了.)Itis/hasbeentwoyearssincemybrotherjoinedthearmy.采用PP管及配件：根据给水设计图配置好PP管及配

14、件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物实义动词分为:1)瞬间动词2)延续动词瞬间动词瞬间动词joinbegin/startborrowfinish/endarrive/comeleavediebuy注意注意:瞬间动词不能和瞬间动词不能和时间段时间段连用连用.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物常见非延续性动词和延续性动词的转变常见非延续性动词和延续性动词的转变varrive/come/gotodievbecomeaborrowvLeave/movev

15、buyopenvjoinvstart/beginfinish/endvcatchacoldgetupvgettoknowgetoutvclosewakeupvgotosleepvbecomeinterestedinbeinbedeadhavekeepbeaway/beoutbeabein/amemberofbeopenbeonbeoverhaveacoldbeupknowbeoutbeclosedbeawakebeasleep/sleepbeinterestedin采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无

16、污物 巧记瞬间性动词的转换巧记瞬间性动词的转换“开始开始离离去去借借来来还还，出生出生入入死死买买到到家，家，穿衣穿衣入睡入睡要要感冒感冒，开开开开关关关关变变结束。结束。”采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物,结束性动词转换为以下延续性动词或者表示可以延续的状态的短语arriveat/insp/getto/reachsp/come/go/movetospbeinsp/atschool/athome/onthefarm/behere/bethereHegottoBeijingfiveminutes

17、ago.HeBeijingfor.2)ImovedtotheUSAin2008.ItheUSAsince.3)Iwenthomeyesterday.Ihomefor.4)Theycameherelastweek.They_heresince_.cometo/gobackto/returntobebacktogooutbeoutHecameouttwoyearsago.He_for_.2)WereturntoBeijingyesterday.We_toBeijingsince_.becomebeIbecameateacherin2000.I_ateacherfor_.2)Theriverbeca

18、medirtylastyear.Theriver_dirtyfor_.closebeclosedopenbeopenTheshopclosedtwohoursago.Theshop_for_.2)Thedooropenedatsixinthemorning.Thedoor_forsixhours.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物vgetupbeup;diebedead;leavesp.beawayfromsp.fallasleep/gettotsleepbeasleep;finish/endb

19、eover;marrybemarried;1)Igotuptwohoursago.I_since_.2)HeleftShanghaijustnow.He_Shanghaiforfiveminutes.3)Mygrandpadiedin2002.Mygrandpa_for_.4)Themeetingfinishedatsix.Themeeting_forsixhours.5)Igottosleeptwohoursago.I_since_.6)Theymarriedin1990.They_since_.start/begintodosth.dosth.;beginbeon1)Ibegantotea

20、chatthisschoolin1995.I_atthisschoolsince_.2)Thefilmbegantwominutesago.Thefilm_for_.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物vborrowkeep;losenothave;buyhave;putonwearcatch/getacoldhaveacold;gettoknowknow1)Theyborroweditlastweek.They_itsince_.2)Iboughtapentwohoursago.I_apenfo

21、r_.3)Igottoknowhimlastyear.I_himsince_.4)Iputonmyglassesthreeyearsago.I_myglassesfor_.have/hasgonetohavebeeninHehasgonetoBeijing.He_Beijingfortwodays.jointheleague/theParty/thearmybealeaguemember/aPartymember/asoldierbeamemberoftheleague/thePartybeintheleague/theParty/thearmy1)Hejoinedtheleaguein200

22、2.He_a_fortwoyears.He_a_the_fortwoyears.He_theleaguefortwoyears.2)Mybrotherjoinedthearmytwoyearsago.Mybrother_a_for_.Mybrother_in_fortwoyears.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Exercises vHisfatherhasdied.(for2years)vThefootballmatchhasbegun.(since9:00a.m)vThetwinshav

23、ejoinedthearmy.(sincetheyare18yearsold)vMyteacherhasjustleftNanjing.(for3days)Hisfatherhas been deadfor2years.Thefootballmatchhas been onsince9:00a.m.Thetwinshave been soldiers/been in the armysincetheyare18yearsold.Myteacherhas been away from Nanjingfor3days采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边

24、剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物重重点点句句型型:Itis/hasbeen+段段时时间间+since从从句句 段段时时间间+haspassed+since从从句句eg.他死了两年了：Hediedtwoyearsago.Hehasbeendeadfortwoyears/sincetwoyearsagoItis/hasbeentwoyearssincehedied.Twoyearshaspassedsincehedied.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物v1.这本书我借了一个月

25、了。Iborrowedthisbookamonthago.Itis/hasbeenamonthsinceIborrowedthebook.Ihavekeptthebookforamonth./sinceamonthago.AmonthhaspassedsinceIborrowedthebook.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Have/has gone tohave/has been to have/has been invhave/hasgoneto:已经去了或在途中，还没有返回；vhave

26、/hasbeento:曾今去过某地，现在已经回来了,后面可接表示“次数”的状语;vhave/hasbeenin:表示某人“已在某地停留一段时间，现仍在那里”，其后常带表示一段时间的状语。采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物have/has been to和和have/has gone to 的用法区别的用法区别 1“Have/has been to+地名地名”表示曾经去过某地，说话时已经回到说话地点，常与once、twice、ever、never 等时间连用。2“have/has gone to+

27、地名地名”表示去某地了，现在没有回答，人不在说话地点。巧记巧记：been to been to，gone togone to 意不同，两者用法要记清；意不同，两者用法要记清；have been tohave been to+地名，曾经到过某地行；地名，曾经到过某地行；have gone tohave gone to+地点，到某地去了一走远。地点，到某地去了一走远。用have/has been to和和have/has gone to填空 Hi，Lucy，you ever Beijing？No，I .What about your sister，Lily？Oh，she Chengdu，she w

28、ill come back next week.Ok，thanks.Youre welcome.have been to haventhas gone to用法四用法四采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物1.My parents the Great Wall twice.2.-you ever Xiamen?3.How long Peter the park?4.My sister the shop.She will be back in two hours.1.5.She Shanghai.Sh

29、e isnt here.2.6.She Shanghai for two years.has gone to have been to Have been to hasbeen in has gone to has been in 练一练：练一练：用用have been to,have been in,have gone to填空。填空。采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物ExercisesvTom在哪儿？他去书店买书了。v我在北京待了5年了。vJack去过上海两次了-WhereisTom?-He

30、hasgonetothebookshoptobuysomebooks.IhavebeeninBeijingfor5years.JackhasbeentoShanghaitwice.采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物Correctingv1.Ihaveborrowedthebookfor3months.v2.Mybotherhasjoinedthearmysincehewas18.v3.JackandTomhavelivedheresince5years.v4.Thefilmhasbeenonsi

31、nceIhavecometothecinema.v5.WhenhasMr.Licaughtabadcold?havekepthasbeenin/beenamemberofthearmysince5yearsago/for5yearscamedidcatch采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物v6.Tenyearshavepassedsincetheygotmarried.v7.JimhasgonetoBeijingfor2years.v8.Whattimehavethefactoryopened?

32、v9.IhavegonetoChunhuaMiddleSchooltwicehashasbeenindidopenbeento采用PP管及配件：根据给水设计图配置好PP管及配件，用管件在管材垂直角切断管材，边剪边旋转，以保证切口面的圆度，保持熔接部位干净无污物ExercisesvIamanAmericanboyIcametoChinatwoyearsago.I_(study)herefortwoyears.Myfatheroften(take)me_(play)footballontheplayground.LastweekI_(take)totheparkbyhim.Wesawalotofmonkeys(jump)inthetree.IheardavoicefrombehindWhenI(walk)alongtheriver.Ithoughtmyself.“Itmust_(be)Mr.Brown.He_(take)photos.”We_(enjoy)thatday.We_(go)backtoAmericanextweek.have studied takesto playWas taken wakedjumpbeis takingenjoyedwill go