2020-2021学年牛津译林版八年级英语下册课件：Unit1PastandPresentGrammar

2024/3/262020—2021学年牛津译林版八年级英语下册课件：Unit1PastandPresentGrammarFreetalkWhatdoyouknowaboutMrChenandSunshineTown?MrChenhaslivedinSunshineTownsincehewasborn.MrChenhasmovedtoanewneighbourhood.Heandhiswifehavelivedinthisareasince1965.Thetownhaschangedalotovertheyears.Thegovernmenthasturnedpartofthetowncentreintoanewpark.…PresentPerfectTense现在完成时Structureofthepresentperfecttense

have/has

+done

sb+

UsingthePresentPerfectTense

IhavelivedheresinceIwasborn.

(Thisisthepresentperfecttense.Inthisexample,youcanseewhenIwasborn,llivedhereandIstillliveherewhenthewordsweresaid.)Ilivedheretwoyearsago.(Thisisthesimplepasttense.Inthisexample,Ilivedheretwoyearsago.SomethinghaschangedinthepasttwoyearsandIdon’tliveherenow.)1.Weusethepresentperfecttensetotalkaboutanactionthatstartedinthepastandcontinuestothepresent.EddiehasjusteatenHobo’sfood.2.Weusethepresentperfecttensetotalkaboutanactionthathappenedinthepastandhasaconnectionwiththepresent.(Thisisthepresentperfecttense.Inthisexample,Eddieatethefood,andnowHobohasnothingtoeat.)IhavealreadyvisitedMrChen’sneighbourhoodseveraltimes.3.WealsousethePresentperfecttensetotalkabouthowmanytimesanactionhashappenedtillnow.She'sbeenmarriedthreetimes.Therehavebeenmanybuildingsinmytown.Ican’tgetinthehouse.I’velostmykeys.ShehaslivedinLiverpoolallherlife.Howclean!Whohascleanedtheroom?Wehaveseenthefilmtwice.Matchthereasonsforusingthepresentperfecttenseontherightwiththesentences.startedinthepastandcontinuestothepresenthappenedinthepastandhasaconnectionwiththepresent.talkabouthowmanytimesanactionhashappenedtillnowThePresentPerfectTense-HowtoformHehasjustgonehome.Shehasalreadyhadaholidaythisyear.Ithasbroken!IhaveseenmynewEnglishteacher.Theyhaveboughtanewcar.Youhavefinishedtheexercise.Wehaveseenthisfilmbefore.Workouttherule!◆Weuse“have

+done”withpronounslike_____,_____,_____and_____.◆Weuse“has+done”withpronounslike_____,_____and_____.ItheyyouwehesheitWorkouttherule!Ihaven’t/havenotdonemyhomeworkyet.Youhaven’t/havenotansweredmyquestion.Wehaven’t/havenotworkedonafarm.Theyhaven’t/havenot

seeneachotherforages.Hehasn’t/hasnotbeenhomeforfiveyears.Shehasn’t/hasnot

foundanewjob.Ithasn’t/hasnot

finishedyet.◆Presentperfecttense—Negativesentenceshaven’t/havenot

hasn’t/hasnot+done

sb+

Workouttherule!◆Presentperfecttense—Yes/NoquestionsHave/Has+done...?+sbHaveIeverdoneitbefore?Haveyoupractisedthepianorecently?Havewedoneitright?Havetheygonehomeyet?Hasheworkedherelong?Hasshealreadysentthefax?Hasitworkedproperly?Workouttherule!◆Presentperfecttense–Wh-questionshave/has+done...?+sbWhathaveIdonerecently?Howlonghaveyoustudiedhere?Howlonghavewebeentogether?Wherehavetheyworked?HowmanytimeshashevisitedCanada?Whatcountrieshasshevisited?Wherehasitbeen?Wh-words+Attentionalready肯yet否，疑ever疑,肯never否sinceforjustrecentlysofaruptonowWecanusethesetimeexpressionswiththepresentperfecttense.Lookatthetwopicturesofmyhometown.Nowadays,myhometown_____already________(turn)intoamoderncity.Thegovernment____________(turn)partofthetowncentreintoaparkrecently.already,recentlynowpastpresenthasturnedhasturnednever,everYou____never_______(visit)myhometown.Ifyoucome,youwillfinditisthemostbeautifultownthatyou______ever______(see).havevisitedhaveseenMillieandMrChen___________(talk)aboutSunshineTownsinceanhourago.since,forMillieandMrChen___________(talk)aboutSunshineTownforanhour.havetalkedhavetalkedsince2yearsagosince1998sinceshecametotheschoolfor+一段时间Since+时间点—Whereisthefood?—I_____just_____(eat)it.—I______________(noteat)yet.Howcanyoudothat?just,yethaveeatenhavenoteatenA:Haveyou…recently?

B:Yes,Ihave./No,Ihaven’t.brushed/washed…played/had…planted/climbed…PairworkA:Has…yet?

B:Yes,shehas./No,shehasn’t.read/finished…been/visited…played/swum…PairworkThepastparticiplesofverbsD.

study

–

carry

–work–look–clean–play–B.live–hope–C.stop–plan–workedlookedcleanedplayedlivedhopedstoppedplannedstudiedcarriedCompetitionThepastparticiplesofregularverbs

(规则动词的过去分词)构成方法原形过去时一般情况在动词原形后加-edfinishanswerfinishedanswered以字母e结尾的动词，只加-dmovediemoveddied以“辅音字母+y”结尾的动词，把y改为i,再加-edcarrycrycarriedcried以重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加-edstopplan

stoppedplannedWorkouttherule!不规则动词过去分词的构成参见P122原形过去式过去分词costcostcostreadreadreadmeetmetmetcatchcaughtcaught

bewas/werebeenfallfellfallendrawdrewdrawnflyflewflownseesawseenABBAAA

ABCSimplepasttenseTotalkaboutthingsinthepast.PresentperfecttenseTotalkaboutthingsthathaveaconnectionwiththepresent.DifferenceLet’stry!Inthepast,people______washed/havewashedtheirclothesbyhand.

Withtheinventionofthewashingmachine,people___________had/havehad

moretimetorelax.2.Intheolddays,people______travelled/havetravelledbyship.Nowplanes_________made/havemadejourneysmorecomfortable.UnderlinecorrectverbsPartC(p14)Millie:(1)______you______(see)anyfilmsrecently,Sandy?Sandy:No,Ihaven’t.Whataboutyou?Millie:I(2)________(see)onelastSaturday.Sandy:What’sitabout?Millie:It’saboutthechangesinBeijingoverthepastcentury.Fromthefilm,I(3)_____________(learn)moreabout

Beijing’spastandpresent.Sandy:Oh,IthinkI(4)__________(hear)aboutthefilm.Doyouplantoseeitagain.Millie:Yes,I’dliketo.Have

seensawhavelearnthaveheardPairworkWhathave/has...donetoday?ChangesinTianjinUseatleastfivesentencesinthepresentpe