UnitPastandpresentGrammar课件译林版英语八年级下册

Grammar1.Shenzhenhasdevelopedfromafishingvillagetoatophigh-techcity.2.Shenzhenhasattractedworkersfromacrosstheworld.4.Moreover,thecityhaswonanawardfromUNESCOforbeingarolemodelinencouragingreadingamongthepublic.5.Sincethelate1970s,ShenzhenhasdevelopedatanamazingspeedandhasbecomeasymbolofChina'sdevelopment.Revision3.Ithasrisentobecomeanimportantcentrefortechnologyindustriesintheworldandishometomanytechgiants.WhatdoyouknowaboutShenzhen?payattentiontothestructureofthesentences.+done

sb.+

have/hasPresentPerfectTense现在完成时UsingthePresentPerfectTense

1.Weusethepresentperfecttensetotalkaboutanactionthatstartedinthepastandcontinuestothepresent.ShehaslearnedEnglishfor5years.HehaslivedinBeijingsincehewasborn.ShelearndEnglish5yearsago.simplepasttenseUsingthePresentPerfectTense

2.Weusethepresentperfecttensetotalkaboutanactionthathappenedinthepastandhasaconnectionwiththepresent.Someonehasbrokenthewindow.(窗户现在是坏的)Ihavealreadylostthekey.(我现在没有钥匙)UsingthePresentPerfectTense

3.Wealsousethepresentperfecttensetotalkabouthowmany

timesanactionhashappenedtillnow.Ihavealreadyvisited

MrChen’sneighbourhoodseveraltimes.IhavebeentotheGreatWallthreetimes.现在完成时经常与“since、already、just、yet、ever、recently、for+一段时间”连用Workouttherule!Hehasjustgonehome.Shehasalreadyhadaholidaythisyear.Ithasbroken!IhaveseenmynewEnglishteacher.Theyhaveboughtanewcar.Youhave

finishedtheexercise.Wehaveseenthisfilmbefore.◆Weuse“have

+done”withpronounslike_____,

_____,_____and_____.◆Weuse“has+done”withpronounslike_____,_____and_____.ItheyyouwehesheitWorkouttherule!Ihaven’t/havenotdonemyhomeworkyet.Youhaven’t/havenotansweredmyquestion.Wehaven’t/havenotworkedonafarm.Theyhaven’t/havenotseeneachotherforages.Hehasn’t/hasnotbeenhomeforfiveyears.Shehasn’t/hasnotfoundanewjob.Ithasn’t/hasnotfinishedyet.◆

Presentperfecttense—Negativesentenceshaven’t/havenot

hasn’t/hasnot+done

sb.+

Practice1.IhaveseenmynewEnglishteacher.将下列句子变为否定句。Ihavenot

seenmynewEnglishteacher.2.Theyhaveboughtanewcar.Theyhavenot/haven`t

boughtanewcar.3.Shehasalreadyhadaholidaythisyear.Shehasnot/hasn`thadaholidaythisyearyet.◆

Presentperfecttense—Yes/NoquestionsHave/Has+done...?

+

sb.HaveIeverdoneitbefore?Haveyoupractisedthepianorecently?Havewedoneitright?Havetheygonehomeyet?Hasheworkedherelong?Hasshealreadysentthefax?Hasitworkedproperly?Workouttherule!Practice1.IhaveseenmynewEnglishteacher.将下列句子变为一般疑问句。Have

youseenyournewEnglishteacher?2.Theyhaveboughtanewcar.Havethey

boughtanewcar?3.Shehasalreadyhadaholidaythisyear.Hasshehadaholidaythisyearyet?Weformthepastparticlesofregularverbsbyadding–ed,justaswhatwedotoformthesimplepasttenseoftheseverbs.Mostverbs+edfinish--finishedVerbsendingin-e+dchange-changedVerbsendinginaconsonant+y-y+iedcarry—carriedShortverbsendinginavowel+aconsonantdoubletheconsonant+edstop--stopped(1)一般动词，在词尾直接加“ed”。

work---worked---worked(2)以“e”结尾的动词，只在词尾加“d”。

live---lived---lived(3)以“辅音字母+y”结尾的动词，将“y”变为“i”，再加“ed”。

study---studied---studied(4)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“ed”。

drop---dropped--dropped过去分词的变化规则规则变化Weformthepastparticiplesofirregularverbsdifferently.Herearesomeexamples.Nochangecome—comehurt--hurtChangethevowelhold—heldwin—wonChangetheconsonantlend—lentbuild--builtChangethevowel(s)andtheconsonant(s)catch—caughtkeep—keptforget-forgottentell--toldothersbe—beenhave—hadfall—fallenfly—flowndraw—drawnsee--seen1.borrow__________2.hope________3.make_________4.get__________5.plan________6.cry_________7.send__________8.say_________9.grow________10.hit__________11.watch_________12.enjoy________PracticeMrWuwantsthestudentstopractiseusingthepresentperfecttense.Helpthemwritethepastparticiplesoftheverbsbelow.borrowedhopedmadegotplannedcriedsentsaidgrownhitwatchedenjoyed●SunshineTown(1)___________(change)alotovertheyears.●Thegovernment(2)______just_________(turn)partofthetowncentreintoanewpark.●Recently,theairinourtown(3)___________(improve)alot.●Somepeopleinthecountryside(4)______already_______(move)tonewbuildings.●Lastyear,thegovernment(5)__________(build)anartmuseum.

I(6)_______________(notvisit)themuseumyet.MilieiswritingaboutthechangesinSunshineTown.Completehernoteswiththecorrectformsoftheverbsinbrackets.Practicehaschangedhasturnedhasimprovedhavemovedbuilthaven`tvisitedMillieiswritingaboutherfamilylife.Completehersentenceswiththecorrectformstheverbsinthebox.Practicebuyvisitfindleavegoreturnwork●Myfather(1)________ajobasanengineerinacompanyafterhefinishedcollege.He(2)__________atthecompanyforover17yearsuptonow.●Mymum(3)_____herhometownattheageof18,butsheoftenreturnstovisitmygrandparents.Lastweekshe(4)_________

backtoseethemand(5)______not________yet.●Myfamily(6)________acarlastyear.Sincethen,we(7)__________manybeautifulplacesinthiscar.foundhasworkedleftwenthasreturnedboughthavevisitedReporter:HelloAndrew.You(1)___________(live)inShenzhenfortenyears.Doyoulikelivinghere?Andrew:Yes,verymuch.I(2)________(be)tomanycitiesaroundtheworld,butShenzhenismyfavourite.YoucouldsayI(3)________(fall)inlovewithShenzhen-itfeelslikehome.Reporter:Infact,there(4)________(be)lotsofchangesinthepastfewyears.(5)________you________(notice)anyofthesewhileyou'vebeenhere?Andrew:Well,transporthaschangedalot.There(6)________(be)moreundergroundlinesnow,Itaketheundergroundmostdays.It'sveryeasytogetaroundthecity.Reporter:Yes,itis.Thankyouforspeakingtome.I(7)________(enjoy)hearingyourthoughtsaboutourcity.MillieiswatchingareporterinterviewingaforeignerwhohaslivedinShenzhenforafewyears.Helpherfillintheblankswiththecorrectformsoftheverbsinbr