PresentPerfectTense现在完成时HaveyoueverreadLittleWoman?Ihaven’treadityet.ButIhavehadthebookfortenyears.AndIhavekeptitonmybookshelf(书架)sincetenyearsago.HaveyoueverreadLittleWoman?Ihaven’treadityet.ButIhavehadthebookfortenyears.AndIhavekeptitonmybookshelf(书架)sincetenyearsago.3.现在完成时的用法2.一般疑问句及否定句的结构1.现在完成时的构成4.时间状语2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语主语+have\has+动词过去分词助动词:talk---like---study---stop---have\has动词过去分词变化规则:talkedlikedstudiedstopped2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语Have/Has+主语+动词过去分词疑问式:Ihavefinishedmyhomework.Haveyoufinishedyourhomework?A:Haveyousurfedtheinternet(上网)?B:Yes,Ihave.Ihavesurfedtheinternet.No,Ihaven’t.Ihaven’tsurfedtheinternet.talkonthephoneforanhourplaysoccereat(eaten)potatochipssee(seen)atiger2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语Have/Has+主语+动词过去分词否定式:主语+have/has+not+动词过去分词.疑问式:1)Wehavevisitedthemuseum.(改为一般疑问句)2)Theyhaveseenthefilm.(改为否定句)3)Hehasreturnedthebook.(对划线部分提问)4)Jennyhashadherlunchforthreedays.(改为一般疑问句并做否定回答)Haveyouvisitedthemuseum?havenot=haven’thasnot=hasn’t2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语Have/Has+主语+动词过去分词否定式:主语+have/has+not+动词过去分词.疑问式:1)Wehavevisitedthemuseum.(改为一般疑问句)2)Theyhaveseenthefilm.(改为否定句)3)Hehasreturnedthebook.(对划线部分提问)4)Jennyhashadherlunchforthreedays.(改为一般疑问句并做否定回答)Theyhaven’tseenthefilm.2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语Have/Has+主语+动词过去分词否定式:主语+have/has+not+动词过去分词.疑问式:1)Wehavevisitedthemuseum.(改为一般疑问句)2)Theyhaveseenthefilm.(改为否定句)3)Hehasreturnedthebook.(对划线部分提问)4)Jennyhashadherlunchforthreedays.(改为一般疑问句并做否定回答)Whathashereturned?2.一般疑问句及否定句的结构2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语Have/Has+主语+动词过去分词否定式:主语+have/has+not+动词过去分词.疑问式:1)Wehavevisitedthemuseum.(改为一般疑问句)2)Theyhaveseenthefilm.(改为否定句)3)Hehasreturnedthebook.(对划线部分提问)4)Jennyhashadherlunchforthreedays.(改为一般疑问句并做否定回答)HasJennyhadherforthreedays?No,shehasn’t.2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语present(now)futurepastMum,Ihavealready(已经)cleanedthem.John,cleanyourteethplease.2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语1)过去发生或已经完成的某一动作对现在造成的影响或结果。2)现在完成时表示从过去一直持续到现在的动作或状态。Someonehasbrokenthedoor.(窗户现在是坏的)Ihavealreadylostthekey.(我现在没有钥匙)Ihaven’treadthatbookyet.(不了解书的内容)Ihavejustcleanedmyhands.(手是干净的)2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语1)过去发生或已经完成的某一动作对现在造成的影响或结果。2)现在完成时表示从过去一直持续到现在的动作或状态。ShehaslearnedEnglishfor5years.HehaslivedinBeijingsince(自从)hewasborn.Haveyoustayedheresince(自从)3o’clock?2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语HaveyoueverreadLittleWoman?Ihaven’treadityet.ButIhavehadthebookfortenyears.AndIhavekeptitonmybookshelf(书架)sincetenyearsago.3.现在完成时的用法2.一般疑问句及否定句的结构1.现在完成时的构成4.时间状语2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语for+时间段since+1.Mr.BrownhashadhisTV________15years.2.I’vetakendrivinglessons_________lastmonth.3.Mysisterhashadhercellphone________amonth.4.Myfriendshaven’tvisitedme___________mybirthday.5.Wehaven’tusedourcar______alongtime.6.Shehasn’thadagoodcupofcoffee_______years.7.Tomhaswornglasses_________hewas7yearsold.forforforforsincesincesince时间点句子2.一般疑问句及否定句的结构3.现在完成时的用法1.现在完成时的构成4.时间状语for+时间段since+时间点句子already(已经)yet(已经)just(刚刚)ever(曾经)never(从来没有)before(从前)–—肯定句中——否定,疑问句末——肯定句中—肯定、否定句中—句中—句末一般过去时与现在完成时之比较1)一般过去时表示过去某时发生的动作或单纯叙述过去的事情,强调动作,和现在不发生关系。而现在完成时表示过去发生的某一动作对现在造成的影响或结果,强调的是现在的情况。2)一般过去时常与具体的时间状语连用,而现在完成时通常与模糊的时间状语连用,或无时间状语。◎一般过去时的时间状语有:yesterday,lastweek,…ago,in1980,inOctober,justnow,等具体的时间状语。◎共同的时间状语有:thismorning,tonight,thissummer,before,already,等。◎现在完成时的时间状语有:for,since,ever,never,just,already,yet,inpastyears等不确定的时间状语。请大家认真分析比较下列各例句:Isawthisfilmyesterday.(只说明动作发生在过去。)Ihaveseenthisfilm.(强调对现在的影响,电影的内容已经知道了。)ShehasreturnedfromParis.(她已从巴黎回来了。)Shereturnedyesterday.(她是昨天回来的。)HehasbeenintheLeagueforthreeyears.(在团内的状态可延续)HejoinedtheLeaguethreeyearsago.(三年前入团,joined为短暂行为。)注意:句子中如有一般过去时的时间副词(如yesterday,lastweek,in1960)时,不能使用现在完成时,要用过去时。例如:•(错)Tomhaswrittenalettertohisparentslastnight.•(对)Tomwrotealettertohisparentslastnight.eat-see-read-keep-have-be-leave-make-go-meet-come-write-tell-buy-find-build-builtfoundtoldcomegonelefthadreadeatenboughtwrittenmetmadebeenkeptseen1.I____________(wait)forhimfortwohours.Iamveryangry.2.He_________(be)adoctorsincehewastwenty.3.Thefilm__________(be)onforfifteenminutes.4.____youever____(read)thatbookbefore?5.____youever____(try)tochangeher?6.Noone____________(arrive)hereyet.7.______thebus_____(leave)yet?8.I_____________(nottalk)tohimyet.Haven’ttalkedHaslefthasarrivedHavetriedHavereadhasbeenhasbeenhavewaited用所给动词的适当形式填空9.I____already______(see)thefilm.I______(see)itlastweek.10.Look!Themonkey__________(climb)thetree.11.Myfather____just_____(come)backfromwork.Heistirednow.12.Thestudents____________(read)Englishwhentheteachercamein.13.I______________(work)heresinceI______(move)herein1999.14.SofarI_______________(make)quiteafewfriendshere.15.Howlong_______theWangs_______(stay)here?Fortwoweeks.16.I________just___________(finish)myhomework.17.He________(go)toschoolonfooteveryday.18.______you______(find)yoursciencebookyet?isclimbingwerereadingmovedhaveworkedhavemadegoeshavestayedhavefinishedHavefoundsawhaveseenhascome1.Shehasdoneherhomework.(改否定句)