语法专项课件(现在完成时1)Part语法透析考点大观易错辨析通关训练语法透视考点大观易错辨析通关训练现在完成时定义现在完成时定义三要素:1.表示到现在为止已经完成或刚刚完成的动作。2.一件发生在过去的事情对现在产生影响。3.一个动作开始于过去,并持续到现在(也许还将持续下去)。Wehaveknowneachothersince2005.我们从2005年认识的。IhavelivedinWuhanforseveralyears.我在武汉住了好几年了。现在完成时结构语法透视考点大观易错辨析通关训练肯定句:主语+have/has+过去分词+...否定句:主语+haven’t(havenot)+过去分词…主语+hasn’t(hasnot)+过去分词...疑问句:Have/Has+主语+过去分词...?Ihaven’tfinishedmyhomework.我还没有完成作业。Haveyoufinishedyourhomework?你完成作业了没?Ihavefinishedmyhomework.我已经完成作业了。现在完成时的用法语法透视考点大观易错辨析通关训练1)表示到现在为止已经完成或刚刚完成的动作。Nowwehaveplantedallthetrees.截止目前,我们种完了所有的树。Hehasjustcomeback.他已经回来了。Theyhavebuiltmanybuildingsinthiscity.他们在这个城市建成了好多建筑物。现在完成时的用法语法透视考点大观易错辨析通关训练2)表示过去发生的动作,强调结果或对现在的影响。Someonehasbrokenthewindow.Ihavealreadylostthekey.Ihaven’treadthatbookyet.Ihavejustcleanedmyhands.(窗户现在是坏的)(我现在没有钥匙)(不了解书的内容)(手是干净的)现在完成时的用法语法透视考点大观易错辨析通关训练3)表示从过去开始并持续到现在的动作或状态。ShehaslearnedEnglishfor5years.她学英语已经五年了。HehaslivedinBeijingsincehewasborn.从他出生那天起就住在北京。HashelivedinShenzhenfor4years?他住在深圳四年了吗?语法透视考点大观易错辨析通关训练过去分词的变化(规则)(1)一般动词,在词尾直接加“ed”。work---worked---worked(2)以“e”结尾的动词,只在词尾加“d”。live---lived---lived(3)以“辅音字母+y”结尾的动词,将“y”变为“i”,再加“ed”。study---studied---studied(4)重读闭音节结尾,末尾只有一个辅音字母,先双写该辅音字母,再加“ed”。drop---dropped--dropped语法透视考点大观易错辨析通关训练过去分词的变化(不规则)A.过去分词与不规则动词的过去式形式一样have—had—hadspend—spent—spentmake—made—madesay—said—saidfind—found—foundhear—heard—heardmeet—met—metleave—left—leftfly—flied—flied语法透视考点大观易错辨析通关训练过去分词的变化(不规则)B.过去分词与过去式形式不一样take—took—takensee—saw—seenspeak—spoke—spokensing—sang—sungdrive—drove—drivenbe—was/were—beengo—went—gone语法透视考点大观易错辨析通关训练过去分词的变化(不规则)C.过去分词,过去式与动词原形一样cut—cut—cutput—put—putlet—let—letread—read—read语法透视考点大观易错辨析通关训练现在完成时的标志词1标志词:already(已经),yet(已经)already:常用于肯定句中.yet:常用于否定句,疑问句尾.Ihavealreadyseenthisfilm.我已经看过这部电影了。Ihaven’tseenthisfilmyet.我还没有看这部电影。Haveyouseenthisfilmyet?你看过这部电影了没?语法透视考点大观易错辨析通关训练现在完成时的标志词2since:(自…以来)1)since+时间点Hehasstayedheresince5o’clock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达)for+时间段Hehaskeptthebookfor2weeks.语法透视考点大观易错辨析通关训练辨析havebeento和havegonetohavebeentosomeplace.曾经去过某地,已经回来.hasgonetosomeplace.某人去了某地,还没有回来.MyfatherhasgonetoShanghaiforameeting.他(已经)去了上海。MyfatherhasbeentoShanghaiforameeting.他(曾经)去了上海。语法透视Next考点大观易错辨析通关训练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.forsinceforsinceforforsince用for或since填空语法透视考点大观易错辨析通关训练用have/hasbeento,have/hasgoneto填空1.—Whereisyourbrother?—He____________theshop.He’llbebacksoon.2.—______youever_________toAmerica?—Yes,I___________NewYorktwice.3.—Hereyouareatlast!Where_____you_____?—I_____________London.4.—David_____________Australia.—I’msurehe’salreadyarrived.5.—IsBennyhere?—No,he__________theschoollibrary.Heleftfiveminutesago.hasgonetoHavebeentohavebeentohavebeenhavebeentohasgonetohasgonetoHomework:Finishexercise“现在完成时专项练习”。