八年级英语下册 现在完成时课件 人教新目标版.ppt

thepresentperfecttense thekeyisn tinhispocketsnow hehaslosthiskey theyareintheroomnow theyhavecomeintotheroom past now yesterday wecleanedtheclassroom now theclassroomiscleanbecausewehavecleanedit 用法1 强调过去发生的动作对现在产生的结果或影响 1 myfatherboughtmanybooksformeyesterday now ihavealottoreadbecause 2 isawthisfilmlastweek now iknowthisfilmbecausei 3 ifinishedmyhomeworkyesterday now icangiveittotheteacherbecausei myfatherhasboughtmanybooksforme haveseenitbefore havefinishedit 仍然 还 用在疑问句和否定句中 ihaven treadthisbookyet haveyouhadbreakfastyet already yet 已经 通常用于肯定句中 ihavealreadypostedtheletter 有时 也用在疑问句中表示惊讶 haveyoueatenupallthefoodalready 构成 have has 动词过去分词 时间状语 already yet ever never just before 从来不 用在否定句中 ishefamous ihaveneverheardofhim ever never 曾经 通常用于疑问句和肯定句中 ihaveeverseenthisfilm haveyoueverbeentotheusa 以前 用在完成时中 放在句尾 haveneverreadthiskindofbooksbefore just before 刚刚 用在陈述句中 ihavejustboughtanovel shebegantoworkin1999 shestillworksherenow shehasworkedatthisschoolfor2years now past ibegantoteachenglishatthisschoolfiveyearsago ihavetaughtenglishatthisschoolfourfiveyears 用法2 过去发生的动作一直延续到现在 1 iamadoctor ibegantoworkwheniwas22 now iam26 i forfouryears 2 wewenttotheusalastmonday todayismonday we stay intheusasincelastmonday haveworked havestayed sinceandfor thewomanhasworkedatthisschoolfor2years sincetwoyearsago since2yearsago since1998 sinceshecametotheschool for 一段时间 since 点时间 一 用for和since填空 threehours threeo clock twodays yesterdayafternoon icamehere lastsunday aweek alongtime 1997 twoweeks threeyearsago lastmonth for since for since since since for for since for since since 1 they veknowneachothersince a 1995b threeyears2 i vebeeninterestedinchinesefor a lastyearb oneyear3 shehasbeenadoctorfor a twoyearsb twoyearsago4 i vehadaheadachesince a igotupthismorningb fivehours5 we vebeenherefor a onehourb oneo clock a a b a b 6 myparentshaveownedthishousefor a alongtimeb manyyearsago7 they vebeeninlovesince a lastspringb threemonths8 wehaveknowneachothersince a oneyearb lastyear9 howlonghaveyoubeenlikethis since a lastnightb twodays10 howlonghassheworkedhere shehasworkedherefor a 1993b sixyears a a b a b exercise根据所给情况 用just already或yet造句 1 afterlunchyougotoseeafriendatherhouse shesays wouldyoulikesomethingtoeat yousay no thankyou i vejusthadlunch havelunch 2 joegoesout fiveminuteslater thephoneringsandthecallersays canispeaktojoe yousay i mafraid goout hehasjustgoneout 3 youareeatinginarestaurantthisevening thewaiterthinksyouhavefinishedandstartstotakeyourplateaway yousay waitamoment not finish 4 youaregoingtoarestaurantthisevening youphonetoreserve 预定 atable lateryourfriendsays shalliphonetoreserveatable yousay no it do ihaven tfinishedityet ihavealreadydone 5 youknowthatafriendofyoursislookingforajob perhapsshehasbeensuccessful askher yousay find 6 annwenttothebank butafewminutesagoshereturned somebodyasks isannstillatthebank yousay no comeback haveyoualreadyfoundthejob shehasalreadycameback 比较现在完成时和过去时的区别 现在完成时所表示的是过去的行动所早成的现在的情况 一般过去时表示的是过去发生的事实 现在完成时不能和确定的过去时间状语连用 如 yesterday lastyear in1976 twodaysago justnow 但可以和一些不确定的时间状语连用 也可和包括现在在内的时间状语连用 如 already yet before latelyrecently once twice ever never 1 shehasalreadycome 2 ihaven treadityet go come leave die等词语表示的动作是一时的 不能延续 不能与for since等表示一段时间的词连用 如不能说 hehasgonefortwomonths f 但可以说 hehasbeenawayfor2months 总结现在完成时 1 构成 have has 过去分词 2 概念 1 表示过去或已经完成的某一动作对现在成的影响或结果 常与下列状语连用 already just yet ever never before 2 表示过去已经发生 持续到现在的动作或状态 可以和表示从过去某一时刻延续到现在 包括 现在 在内 的一段时间的状语连用 a for和表示一段时间的词组连用 如 for3yearsb since和表示过去某一时刻的词或词组连用 如 since1997 sincetwoyearsago sincelastweek 动词的过去式以及过去分词 aaa put put putlet let letabb stand stood stoodaba become became becomeabc eat ate eaten 现在完成时专项练习单项选择 1 bothhisparentslooksad maybethey what shappenedtohim 呼和浩特 knew haveknown mustknow willknow2 hehas b beentoshanghai hashe already never ever still3 haveyoumetmrli just ago before amomentago4 thefamouswriter onenewbookinthepasttwoyear iswriting waswriting wrote haswritten5 ourcountry alotsofar yes ihopeitwillbeeven haschanged well changed good haschanged better changed better6 zhao already atthisschoolfortwoyears was studying will study has studied are studying7 we xiaolisinceshewasalittlegirl know hadknown haveknown knew8 harrypotterisaverynicefilm i ittwice willsee haveseen saw see 9 thesefarmershavebeentotheunitedstates really when there willtheygo didtheygo dotheygo havetheygone10 you yourhomeworkyet yes i itamomentago did do finished have done finished have done havefinished will do finish11 hisfather thepartysince1978 joined hasjoined wasin hasbeenin12 doyouknowhimwell sure we friendssincetenyearsago were havebeen havebecome havemade13 howlonghaveyou here abouttwomonths been gone come arrived14 hurryup theplay fortenminutes hasbegun hadbegun hasbeenon began15 it tenyearssinceheleftthearmy is has will was16 missgreenisn tintheoffice she tothelibrary hasgone went willgo hasbeen17 myparents shandongfortenyears havebeenin havebeento havegoneto havebeen18 thestudentshavecleanedthec