现在完成时态现在完成时态ThePresentPerfectTensestudyEnglishHowlonghaveyoubeenstudyingEnglish?IhavebeenstudyingEnglishfortwoyears.(2009-now)2009startedstudyingEnglish2012studying2yearshasbeenstudyingWhendidyoustartstudyingEnglish?In2009.现在完成时PresentperfecttensePresentperfecttense•构成构成::助动词have/has+过去分词1.肯定句现在完成时的肯定句式是“have（has）＋过去分词”。注意：该句式中的have或has是助动词，has用于第三人称单数，其它人称一律用have。eg.Hehaseatensupper.Theyhaveeatensupper.2.疑问句现在完成时的一般疑问句式是把助动词have或has提到主语之前。(回答用“Yes，---have/has．／“No，---haven’t/hasn’t．”）3.否定句：现在完成时的否定句式是“haven't/hasn't＋过去分词”。eg.Hasheeatensupper?Yes,hehas./No,hehasn’t.eg.Hehasn’teatensupper.Theyhaven’teatensupper.现在完成时态的分类•用法一、•1。表过去发生的某一动作对现在造成的影响或结果,（强调结果现在还存在）例如•Ihavejustcleanedmyclothes.我刚洗过衣服。•（“洗衣服”是发生在过去的动作，对现在造成的结果是“衣服干净了”）•Ihavejusthadmybreakfast.(对现在的影响：不饿)•Hashehadhisbreakfast?Yes,hehas.Whendidhehavehisbreakfast?Hehadbreakfastat6:00.•1.Myfatherboughtmanybooksformeyesterday.•Now,Ihavealottoreadbecause________________________________•2.Isawthisfilmlastweek.•Now,IknowthisfilmbecauseI_____________________.•3.Ididmyhomeworkyesterday.•Now,IcangiveittotheteacherbecauseI______________myfatherhasboughtmanybooksforme.haveseenitbeforehavedoneit.通常与表示包括现在在内的时间副词just(谓语动词之前)（刚刚）,already（已经(肯定句)）,before,yet（一般疑问(句末）：已经；否定句：还）never,ever(疑问句)twicerecently(近来）等状语连用1Tomhasalreadyfinishedhishomework.Tomhasn’tfinishedhishomeworkyet.2Ihavejusthadmylunch.Shehasn’tseenyoubefore.3Haveyouevereatenfish?Ihavenevereatenfish①Ihaveneverheardofthatbefore.②Haveyoueverriddenahorse?③Shehasalreadyfinishedthework.④Haveyoumilkedthecowyet?Yes,Ihavedonethatalready.⑤I’vejustfinishedmyhomework.⑥Hehasnotcomeyet.ExercisesExercises•1.I________(have)lunchalready..•2.thetrain_______(arrive)yet?•3.Tom____never_______(be)toChina.•4.Thetwin______just_____(see)myfather.•5.Thetwins____(see)myfatherjustnow.•6.______youever_______(ride)ahorse?Never.havehadHasarrivedhasbeenhasseensawhaveridden7._____you________(clean)theroom?Yes,we__________(do)thatalready.When_______you______(do)it?We_______(do)itanhourago.8.______he______(see)thisfilmyet?No.When_____he_____(see)it?He______ittomorrow.9.Howmanytimes_____you______(come)here?Once.HavecleanedhavedonediddodidHasseenwillseewillseehavecome1你已经问过这个问题两边了，别再烦我了。2我能借你的字典用一下吗？对不起，已经借给tom了。3你以前见过她吗？不，从来没有过。4你曾经去过北京吗？是的我去过那儿三次。5你已经看完那本小说了吗？是的，我已经把它还给图书馆了。•用法二：表示过去已经开始，持续到现在的动作或状态，也可以表示一直持续到现在并可能还将持续下去。A动词使用延续性动词。B和表时间段的时间状语连用。常与for或since引导的时间连用sofar,upto/tillnow,inthelast/past+一段时间，allone’slife,bynow,thesedays,thesedays、fortwoyears、since1984、sincehecamehereIhaven’tseenherthesedays.ShehaslearntEnglishfor3years/since3yearsago.Theyhavelivedheresince1990.WhathashappenedtotheUSAinthelast350years?注意：(1)since＋一段时间＋ago＝for＋时间段;sincetwoweeksago=fortwoweeks;Ihavekeptthelibrarybookforaweek.=Ihavekeptthelibrarybooksinceaweekago.(2)since+时间点＝for＋时间...
