现在完成时态课件_final (1)

现在完成时ThePresentPerfectTense一构成:have/has+动词过去分词肯定主语+have/has+done否定主语+have/hasnot+done疑问Have/Has+主语+done+其他Yes,主+have/has.No,主+haven’t/hasn’t.Ihavefinishedmyhomework.Ihavenotfinishedmyhomework.Haveyoufinishedyourhomework?Yes,Ihave./No,Ihaven’t.ShehasbeentoEurope.Shehasn’tbeentoEurope.HasshebeentoEurope?Yes,shehas./No,shehasn’t.1.规则动词：与过去时变化相同。(1)一般+-edwork---worked---worked(2)以“e”结尾,+-d。live---lived---lived(3)“辅音字母+y”结尾，y变i,+-ed。cry---cried---cried(4)重读闭音节结尾(辅元辅)，双写后+-ed。drop---dropped--dropped2、不规则动词，见不规则表动词过去分词(pp)变化规则二含义及用法1表示过去发生的动作或事情，对现在的影响和产生的结果。常用的关键词yet(否/疑),already已经ever/never曾经/从来不just刚刚before以前recently,lately最近inthelast5years近五年以来bynow,sofar,uptonow,tillnow迄今once,twice…一次…(6)before用于句末,表示“以前”I’veseenitbefore.Hassheriddenabikebefore?A:______yourbrother_________anewwatch?(buy)B:Notyet.KeywordsHasboughtyetA:_______youever_______tothepark?(be)B:Yes,Ihave.KeywordsHavebeenyeteverI______never______ofanythinglikethat.(hear)KeywordshaveheardyeteverneverI______just________thedesk,youcantakeittoyourclassroom.(mend)Keywordshavemendedyeteverneverjust_______you_______theForbiddenCity(紫禁城)before?(visit)KeywordsHavevisitedyeteverneverjustbeforeHe____already______ajob.(find)KeywordshasfoundyeteverneverjustbeforealreadyWe_______only____________thefirstfivequestionssofar.(discuss)KeywordshavediscussedyeteverneverjustbeforealreadysofarThey______________over20,000fruittreesuptonow.(plant)KeywordshaveplantedyeteverneverjustbeforealreadysofaruptonowGreatchanges_________________inBeijinginthepast10years.(takeplace)Keywordshavetakenplaceyeteverneverjustbeforealreadysofaruptonowinthepast10yearsI____________herlately.(notsee)Keywordshaven’tseenyeteverneverjustbeforealreadysofaruptonowinthepast10yearslatelyI_________________himrecently.(nothearfrom)Keywordshaven’theardfromyeteverneverjustbeforealreadysofaruptonowinthepast10yearsinhislifelatelyrecentlyHe___________inthishighschooltillnow.(teach)Keywordshastaughtyeteverneverjustbeforealreadysofaruptonowinthepast10yearslatelyrecentlytillnow2.表示一个从过去开始，一直持续到现在的动作或状态。通常和for或since引导的时间状语连用。注意：动词延续性（1）for+Ihavebeenherefor5weeks.He’sstudiedEnglishfor3years.Shehasworkedfor10hours.一段时间（2）since+(过去的)时间点Ihavebeenheresince2000.Hehasworkedasalawyersince5yearsago?They’velivedinCQsincetheymarriedin2000.注2)：对for或since引导的时间状语提问用howlongIhavelivedherefor10years.Howlonghaveyoulivedhere?Shehasstoodheresince2hourago.Howlonghasshestoodhere?注3)：短暂性动词不能和for或since引导的时间状语连用，也不能用于howlong问句中。（误）Ihaveleftfor5years.(正)Ihavebeenawayfor5years.Tom___________inthefactorysinceheleftschooltenyearsago.(work)KeywordshasworkedsinceA:Howlong______you________inthisschool?(teach)B:For6years.Keywordshavetaughtneverforhave/hasbeentohave/hasgonetohave/hasbeenin1.Bill____________London,hewillcomebacktomorrow.2.A:Wherearethetwins?B:They___________thecinema.3.I_______________Paristwice.4.A:Haveyouever_________America?B:No,never.5.HeleftforEnglandtwodaysago.He___________therefortwodays.hasgonetohavegonetohavebeentobeentohasbeen