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WelcometoourWelcometoourclassclass----------现在现在完成完成时态时态语法练习课时态时态不同时间发生的动作，动词要用不同形式已学习过的时态已学习过的时态名称时间动词形式一般现在时平时，经常现在进行时正在进行一般将来时即将，计划1.will/shall+v原形2.am/is/aregoingto+v原形一般过去时过去（与现在无关）1.v-ed（规则动词）2.不规则动词过去进行时过去某一时间，在进行was/were+v-ing1.v原形2.v三单am/is/are+v-ing1.will/shall+v原形2.am/is/aregoingto+v原形1.v-ed（规则动词）2.不规则动词was/were+v-ing判断下列句子的时态判断下列句子的时态1.Sheworksinafactory.2.Iwasdoingmyhomeworkatthistimeyesterday.3.WearegoingtohaveapicnicthisSunday.4.Theyheldasportsmeetinglastweek.5.Areyouhelpingyourmother.一般现在时一般现在时过去进行时一般将来时一般过去时现在进行时现在完成时现在完成时1.过去发生的动作对现在造成的影响或结果。2.过去已经开始，持续到现在的动作或状态动词构成：have/has+v过去分词hadbreakfastIhavejusthadmybreakfast.(现在我不饿)I’mnothungrynowmovedherein2000IstilllivehereIhavelivedhereforthreeyears.Ihavelivedheresince2000/threeyearsago.now现在完成时动词构成:have/has+v过去分词助动词否定haven’thasn’t疑问Haveyou……?Hashe……?动词的过去分词形式动词的过去分词形式1.规则动词2.不规则动词finish--finished--finishedlive--lived--livedcarry--carried--carriedstop—stopped--stoppedEg.go—went—gonesee---saw—seenforget—forgot--forgottenI,finish,homeworkIhaven’tfinishedmyhomework.Haveyoufinishedyourhomework?Yes,Ihave./No,Ihaven’t.Ihavefinishedmyhomework.1.她成为一名护士已经三年了。2.我五年前就认识李雷了。3.那些相片我已经寄给他了。（post）4.我来到这个学校后，他就一直教我。5.我刚丢了我的历史书。Shehasbeenanurseforthreeyears.IhaveknownLileisincefiveyearsago.Ihavealreadypostedthephotostohim.HehastaughtmesinceIcametotheschool.Ihavejustlostmyhistorybook.(1).for+表示一段时间的短语(2).since+表示过去时间点的词语(3).since+表示过去时间的时间状语从句eg.Ihavebeenateacher______ayear.Hehasbeenatthisschool_______1992.Wehavelearned1,000Englishwords_______wecametothisschool.forsincesinceB.just,already,yet,before/ever,never有此类副词时,常强调动作完成,不强调动作的持续.eg.Haveyou_____beentoJapan?Ihave_____finishedmyhomework.Ihavefinishedmyhomework______.Ihaven’tfinishedmyhomework____.everjustalreadyyet1.现在完成时句中常见的时间A.表示从过去一直持续到现在,不能是具体过去时间2.区分短暂性动词与持续性动词.表示短暂性(瞬间性)的动词在现在完成时的句中不能和一段时间连用.即for,since短语或howlong问句come/arrivegooutleavebeginbuyborrowjoindiecatchacoldbeat/in…beoutbeaway(from)beonhavekeepbeamemberofbedeadhaveacold改错:Howlonghaveyoubecomealeaguemember？Formorethanoneyear.Haveyouarrivedheresincelastnight.Yes，you’reright.Thedoghasdiedforamonth.HehasgonetoShanghaitwice.Howlonghavebeenatthisschool?Sincetwoyears.beenbeenbeendeadbeenago.ForThankyouThankyouBye-bye!Bye-bye!