Unit3OnlinetoursGrammar课件-牛津译林版英语八年级下册

Unit3Onlinetours

Grammar完成下列句子去年夏天，我爬黄山。前几天，她买了一辆新自行车。我已经爬过黄山了。她已经买了一辆新自行车。I_______(climb)MountHuanglastsummer.She________(buy)anewbiketheotherday.I____________(climb)MountHuangalready.She___________(buy)anewbike.climbedboughthaveclimbedhasbought一般过去时Simplepasttense现在完成时Presentperfecttense动词形式一般过去时Simplepasttense现在完成时PresentperfecttenseIclimbedMountHuanglastsummer.规则变化过去式

V原形+edSheboughtanewbiketheotherday.不规则变化过去式需特殊记buy--boughtam/is/are--________was/wereIhaveclimbedMountHuang.规则变化:have/has+V过去分词

=V原形+edShehasboughtanewbikealready.不规则变化:have/has+V过去分词需特殊记buy--boughtam/is/are--________been肯定句一般过去时Simplepasttense现在完成时PresentperfecttenseI studied.You studied.He,She,It studied.We studied.You studied.They studied.主语+动词过去式I studied.You studied.He,She,It studied.We studied.You studied.They studied.havehavehashavehavehave主语+have/has+动词过去分词否定句一般过去时Simplepasttense现在完成时Presentperfecttense

主语+didnot

+动词原形

didn’t主语+have/hasnot

+动词过去分词

haven’t/hasn’tI study.You study.He,She,It study.We study.You study.They study.didn’tdidn’tdidn’tdidn’tdidn’tdidn’tI studied.You studied.He,She,It studied.We studied.You studied.They studied.haven’thaven’thasn’thaven’thaven’thaven’t一般疑问句Istudy?you study?he,she,itstudy?westudy? youstudy?theystudy?

Did+主语+动词原形？Istudied?youstudied?he,she,itstudied?westudied?youstudied?theystudied?HaveHaveHasHaveHaveHaveHave/Has+主语+动词过去分词？DidDidDidDidDidDid一般过去时Simplepasttense现在完成时Presentperfecttense特殊疑问句现在完成时PresentperfecttenseWhostudied?

Wh-+动词过去式？

Whendidyoustudy?

Wh-+did+主语+动词原形？Whohasstudied?Howlonghaveyoustudied?

Wh-+have/has

+

动词过去分词？

Wh-+have/has

+

主语

+动词过去分词？一般过去时Simplepasttense标志词yesterday(morning/…)theotherdaylast…(night/year/week/...)段时间+agothedaybeforeyesterdayinthepastonthefirst/second/…dayjustnowoncein2003/fromthenononMarch1stalready/ever/never/just

中间yet/recently/before

句末

sofar/uptonow至今/到目前为止for+段时间since+…in/overthepast/lastfewyears/…overtheyearsthesedays,次数(manytimes,once)sincethen/eversince提问：When?提问：Howlong?一般过去时Simplepasttense现在完成时Presentperfecttense用法丹尼尔两年前去了北京。丹尼尔已经在北京住了两年了。Daniel______(go)toBeijingtwoyearsago.Daniel_________(live)inBeijingfortwoyears.haslivedwent1表示只在过去某一个时间发生的事情或状态，并且做完了。pastnow去北京从现在看过去（两个时间段），表示过去的动作或状态持续到现在。pastnow住北京DanielstilllivesinBeijingnow.一般过去时Simplepasttense现在完成时Presentperfecttense用法丹尼尔上个月买了一个新电脑。丹尼尔已经买了一个新电脑。Daniel______(buy)anewcomputerlastmonth.Daniel____________(buy)anewcomputersincelastmonth.hasboughtbought2表示只在过去某一个时间发生的事情或状态，并且做完了，强调过去何时发生。pastnow买电脑从现在看过去（两个时间段），表示过去的动作对现在有影响。pastnow买电脑Danielhasacomputernow.一般过去时Simplepasttense现在完成时Presentperfecttense用法吴老师在2010年和2011年访问加拿大。吴老师已经去过加拿大两次。MrWu______(visit)Canadain2010and2011.MrWu____________(be)toCanadatwice.hasbeenvisited3表示只在过去某一个时间发生的事情或状态，并且做完了，强调过去何时发生。pastnow访问加拿大2010从现在看过去（两个时间段），强调到目前为止某个动作发生过的次数，表示经历。访问加拿大2011pastnow去过加拿大去过加拿大一般过去时Simplepasttense现在完成时Presentperfecttense一般过去时现在完成时动词结构用法标志词对时间状语提问did/was/were动词的过去式have/hasdone动词的过去分词过去一个时间段的做完的动作或状态，强调过去何时发生从现在看过去（两个时间段）有影响/持续/经历yesterday/thedaybeforeyesterday/lastweek/twodaysago/justnow/once/theotherday/in2003/inthepast/…for…/since…/already/yet/ever/recently/fromthenon/overtheyears/inthepast30years/…When?Howlong?一般过去时与现在完成时的区别▲短动词也有现在完成时，没有for/since/Howlong...以及否定句中

不需要短变长。Youcan’tfindTomhere.He_______already_______(leave).

Tip1hasleftHe______________(notbuy)anewcarsince2007.hasn’tbought▲纯粹的过去用一般过去时---Hi,Jill.Haveyougraduatedfromcollege?---Yes.I____________(study)inNanjingUniversityfor4years.IcanstillspeaksomeFrenchnowbecauseI___________(teach)ChineseinFrancefor3years.Tip2studiedtaught

Tip3根据语境判断时态,追问：一过

---Excuseme,youcan’tparkyourcarhere.---Sorry.I________thesign.A.didn’tseeB.haven’tseen---______you______ShanghaiScienceandTechnologyMuseum?---Yes,Ihave.---When______you______it(visit)?---Lastwinterholiday.AHavevisiteddidvisit前几天，过去的某一天visitedsawHavetriedhavelearnthavejustfinishedfinishedwrotehasalreadywrittenwashaven’tbeenhavelivedlivedHaveyoueverbeenhavebeen=forthelasttimedidyougospentDidyoulikehadvisitedatehaveneverbeencn.护照showedhaveseenboughthavereadhasreturnedhavebeen（）1.Hehas_______beentoGuangzhou,hashe?

Ａ.already B.ever Ｃ.never Ｄ.still()2.Allthestudentslooksad.Maybethey______what'shappenedtohim.A.haveknownB.knew C.mustknowD.willknow()3.Hisfather______thePartysince1988.

A.joinedB.hasjoinedC.wasinD.hasbeenin()4.______hasMrWhitebeena