現在完成時講解一、構成:肯定式：主語+助動詞have/has+動詞的過去分詞.疑問式：助動詞Have/Has+主語+動詞的過去分詞?否定式:主語+助動詞have/has+not+動詞的過去分詞.過去分詞規則變化：a)一般情況下，直接加ed,（workworked，waterwatered,finishfinished等;）b)以“輔音字母+y”結尾的動詞,把y變成i再加ed,（carry-- -carriedstudystudied等;）c)以輔+元+輔結尾且中讀的動詞，要雙寫最后一個輔音字母，再加ed。（stopstopped，shopshopped）d)以不發音的e結尾的動詞，只加d（過去分詞不規則變化表：二、用法：用法一：表示過去（已經、曾經或從未）發生的某一動作對現在造成的影響或結果。標志詞：①already,②never,③ever,④just,⑤yet,⑥before,⑦once/twice/數字+times例：Ihavecleanedmyroom.我已打掃了房間(房間現在是干凈的，不需要打掃了)Theyhaveleft.--他們已經離開了,也就是說現在他們人不在這里Ihaveneverhadacar(我從未有過汽車。)Ihavebeentheretwice.a）already往往用于肯定句，用在疑問句時表示強調或加強語氣；yet用于否定句和疑問句。? Hehasalreadylefthere.他已經離開這里了。? Hashealreadylefthere?他（真的）已經離開這里了嗎？（表示加強語氣）? Myteachershaven’thadbreakfastyet.我的老師們還沒有吃早飯。? Haveyouwrittentoyourparentsyet?你已經給你父母寫過信了嗎？b）never是否定詞，表示“從來沒有”，而ever表示“曾經”? WehaveneverbeentotheGreatWall.我們從來沒有去過長城。? HaveyoueverbeentoCanada?你們曾經去過加拿大嗎？c）just用于句中,表示“剛剛”? I’vejusthadbreakfast.我剛吃完早飯。? Whathavetheyjustdone?他們剛剛做了什么？d）before用于句末,表示“以前”? I’veseenitbefore.我以前見過它。練習：用never，ever，already，before,just或yet填空。1.Ihave__________seenhimbefore,soIhavenoideaabouthim.2.Jackhas__________finishedhishomework.3.--Haveyou_________seenthefilm?--No,Ihave________seenit.4.Hasthebusleft_______?Yes,ithas________left.5.Wouldyouliketogotothezoowithme?Yes,butIhavebeenthere_________.★hasgoneto,hasbeento,hasbeenin的區別：1.have/hasgoneto去了某地（還在某地沒回來）Whereisyourfather?你爸爸在哪里？HehasgonetoShanghai.他去上海了。2.have/hasbeento曾經去過（已回，已不在去過的地方）+次數（once/twice/數字+times）MyfatherhasbeentoShanghai3times.我爸爸去過上海3次。畫線提問：________________hasyourfatherbeentoShanghai?3.have/hasbeenin待了多久（去了，現在仍在所待的地方）+for+時間段/+since+時間點MyfatherhasbeeninShanghaifortwomonths/sincetwomonthsago.我爸已經在上海待了兩個月了。畫線提問：_______________hasyourfatherbeeninShanghai?▲注意：注意遇到四個地點副詞要去掉to/in，這四個地點副詞是：here,there,home,abroad練習：用havegoneto/havebeento/havebeenin/wentto填空。1._____youever_____Disneyland?2.Howmanytimes_____you_____Disneyland?3.I_____Nanjingsincetwoyearsago4.Mr.Li_____HongKong.Andhe'llcomebackintwodays.5.—Howlong_____you_____Disneyland?—Forthreedays.I__________thethemeparklastSunday.6.Myfather__________HongKongtwoweeksago.7.Myfather__________HongKongin2005.8.Myfather__________HongKongsince2005.9.Myfather__________HongKongtwice.10.Myfather__________HongKongandhehasn'tcomebackyet.11.—Where'sLucy?—Shehas__________toarestaurantforlunch.12.Haveyou__________tothisparkbefore.13.Ihave__________thereonlyoncethisyear.14.Shehas__________totheshoptobuyanotebook.15.You'relate,LaoWanghas__________toGuangzhou.用法二：表示過去已經開始,并一直持續到現在的動作或狀態。標志詞：⑦uptonow,⑧sofar,⑨for+時間段⑩since+時間點IhavelearntEnglishformorethantenyears.我已經學了10多年的英語。Shehasswumsincehalfanhourago.我已經游泳了半個小時a)for+一段時間Eg.Ihavebeenherefor5weeks.我在這里5周了。He’sstudiedEnglishfor3years.他學習英語3年了。HehasbeenstudyingJapanese______twoyears______.Westartedthepartytwohoursago.（劃線提問）_____________you________theparty?Theoldman_____lastyear.He__________________forayear.（die）（動詞填空）Doyouswimeveryday?（用fortwohours改寫）_______you________fortwohours.6.MissGaoleftanhourago.（同義句轉換）MissGao_______________________________anhour.7.HermotherhasbeenaPartymemberforthreeyears.（同義句）Hermother_______thePartythreeyears________.8.TheGreenFamilymovedtoFrancetwoyearsago.（同義句轉換）_______twoyears________theGreenfamilymovedtoFrance.、三、動詞填空1._____you________(clean)theroom?Yes,we__________(do)thatalready.When_______you______(do)it?We_______(do)itanhourago.2.______he______(see)thisfilmyet?Yes.When_____he_____(see)i