八年级下现在完成时讲解课件.ppt

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1、语法课堂上一页现在完成时下一页主菜单现在完成时主菜单上一页下一页现在完成时的构成现在完成时的主要用法现在完成时的时间状语短暂性动词与时间段的关系havebeen与havegone比较与一般过去时的用法比较现在完成时的构成主菜单上一页下一页have(has）+过去分词过去分词的变化：规则动词(1)一般动词，在词尾直接加“ed”。work---worked---worked,visit---visited---visited(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

2、"，再加“ed”。study---studied---studied,cry---cried---cried(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”。stop---stopped---stopped,drop---dropped--dropped重点1：写出下列动词的过去式和过去分词Work____________Live____________Stay____________Stop____________Clean____________Study____________workedworkedlivedliveds

3、tayedstayedstoppedstoppedcleanedcleanedstudiedstudied不规则动词AAA型costcostcost；cutcutcutAAB型beatbeatbeatenABA型①runranrun；②comecamecome③becomebecamebecomeABB型buyboughtbought；buildbuiltbuiltABC型beginbeganbegun；choosechosechosen过去分词的构成上一页下一页Typeoriginalp.tp.pcutcutcuthit(撞击)hithitcostco

4、stcosthurthurthurtPut(放)putputreadreadreadAAA主菜单meetmetmetkeepkeptkeptmakemademadebringbroughtbroughtbuyboughtboughtthinkthoughtthoughtteachtaughttaughttelltoldtoldlendlentlentspendspentspentfindfoundfoundhearheardheardbuildbuiltbuiltABBbeginbeganbegunsingsangsungdrinkdrankdrunks

5、wimswamswumspeakspokespokenchoosechosechosenknowknewknownforgetforgotforgottenbreakbrokebrokendrivedrovedrivengivegavegiveneatateeatenwritewrotewrittenABCseesawseengowentgonetaketooktakenrideroderiddenwakewokewakengrowgrewgrowndrawdrewdrawnhidehidhiddenABC(now)futurepast现在完成时(pre

6、sentperfecttense)domyhomeworkMother:John,cleanyourteethplease.John:Mum,Ihavealready(已经)cleanedthem.现在完成时的基本句型：肯定式：主语+have/has+动词的过去分词.疑问式：Have/Has+主语+动词的过去分词?否定式:主语+have/has+not+动词的过去分词.例句：6.Hashegonetothelibrary?他是去了图书馆吗？Yes,hehas.是的，是去那里了。No,hehasn’t.不，他没去那里。7.HowlonghasMrsSmit

7、hbeeninBeijing？Smith夫人来北京多长时间了？句型变换Hehasleft.否定句：He___________.一般疑问句：_____he______?回答：Yes,he_____.No,he____.hasn’tleftHaslefthashasn’t句型变换Ihavereadthisbook.否定句：I__________thisbook.一般疑问句：______you_____thisbook?回答：Yes,I_____.No,I______.haven’treadHavereadhavehaven’t现在完成时的主要用法上一页下一页

8、--It’ssodark.--Someonehasturnedoffthelig