Unit1Grammar课件-译林版八年级英语下册

Grammar：PresentperfecttenseRevisionWhatchangeshaveyouseeninShenzhen?

1.Shenzhen,acityin_____________China,hasdevelopedfrom_____________to______________.2.Ithasrisentobecomeanimportantcentrefor__________________intheworld.3.Moreover,thecityhaswonan__________fromUNESCOforbeingarolemodelin______________readingamongthepublic.4.Sincethelate1970s,Shenzhenhasdevelopedatanamazingspeedandhasbecomea___________ofChina'sdevelopment.southernafishingvillageatophigh-techcitytechnologyindustrieshonourencouragingsymbolReadandfindoutmoreaboutShenzhen’schangesReadandfindWhattensedoesthewriteruse?Howdoyouknowthat?ReadandfindPresentperfecttense现在完成时Readandworkouttherules1.I'vejustfoundoutmanythingsaboutShenzhenfrommyuncle.2.He’slivedtheresincehefinishedcollege.3.Transporthasalsoimprovedalot.Peoplecangetaroundthecityeasily.4.I’ve

beentoShenzhenthreetimes.Presentperfecttense现在完成时S+__________+___________have/hasdonethepastparticiplesofverbs(过去分词)ReadandworkouttherulesHe’slivedtheresincehefinishedcollege.自从大学毕业以来，他就一直住在那里。居住在深圳的动作一直持续到现在pastpresenthavelivedthereWeusethepresentperfecttensetotalkabout:anactionthatstartedinthepastandcontinuestothepresent;（从过去持续到现在的动作或状态）;ReadandworkouttherulespastpresentIhave

lostmymobilephone.我的手机丢了anactionthathappenedinthepastandhasaconnectionwiththe______________(past,present);（动作发生在过去但对现在有一定的影响）;MymobilephonelostIdon'thaveaphone.present手机丢失导致我现在没有手机ReadandworkouttherulesI’ve

beentoShenzhenthreetimes.我去过深圳三次。pastpresenthowmanytimesanactionhashappenedupto______________(thepresent,somepointinthefuture).（表示某个动作从过去到现在发生的次数）thepresentReadandworkouttherulesTheusagesofpresentperfecttense123从过去持续到现在的动作或状态表示某个动作从过去到现在发生的次数动作发生在过去但对现在有一定的影响presentthepresentWhendoweusethepresentperfecttense?1.for+一段时间

eg:forfivedays2.since+时间点/一般过去时的句子eg:sincelastSunday,sincehearrived3.just,already,yet,recently,over(thepast/last...)years,sofar,tillnow,untilnow,uptonow,bynow,4.ever,never,before5.Timeadverbialsindicatingthenumberoftimeseg:threetimesRulesofformingthepastparticiplesofregularverbsS+__________+___________have/hasdoneRulesofformingthepastparticiplesofirregularverbsS+__________+___________have/hasdoneRulesofformingthepastparticiplesofirregularverbsonP157动词的过去式和过去分词变化形式相同与原形相同在原形后加t或d原形中元音字母有变化原形中辅音字母有变化原形中元音、辅音字母都有变化RulesofformingthepastparticiplesofirregularverbsonP157动词的过去式和过去分词变化形式不同与原形相同在原形后加en原形中元音字母有变化原形、过去式和过去分词的词形差异较大在原形后加n在过去式上加nReadandsummarythestructures______+___________+_________Shave/hasdoneReadandsummarythestructures______+___________+____+_________Shave/hasdonenotReadandsummarythestructures________+_____+_______?SHave/hasdoneYes,S+have/hasNo,S+have/hasnotPracticehaschangedhasturnedhasimprovedhavemovedbuilthaven’tvisitedalready“已经”用于肯定句

句中(助后实前)/句末e.g.I’vealreadyhadbreakfast.=I’vehadbreakfastalready.Practicefoundhasworkedleftwenthasreturnedboughthavevisitedyet“还(没)”用于否定句句末“已经”用于疑问句句末eg：Ihaven’thadbreakfastyet.Haveyouhadbreakfastyet?PracticehavelivedhavebeenhavefallenhavebeenHavenoticedareenjoyfallinlovewith爱上...Thankyoufordoingsth感谢你做某事现在完成时的使用1.从过去持续到现在的动作或状态2.动作发生