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1、现在完成时一、基本结构：主语+助动词have/has+动词的过去分词肯：e.gI(You)havestudied.He(She,It)hasstudied.We(You,They)havestudied.否：主语+助动词haven’t+动词的过去分词hasn’tI(You)havenot/haven’tstudied.He(She,It)hasnot/hasn’tstudied.We(You,They)havenot/haven’tstudied.havenot=haven’thasnot=hasn’t疑问助动词Have+主语+动词的过去分词…?Hase.g:1
2、)Haveyoustudied?Yes,Ihave./No,Ihaven’t.2)Hashe(she,it)studied?Yes,he(she,it)has.／No,he(she,it)hasn’t.3)Haveyou(they)studied?Yes,we(they)have.No,we(they)haven’t.回答:Yes,主语+have/has.No,主语+haven’t/hasn’t.练一练1)句型转换:Ihavewrittenmypostcard.否：____________________________.一般疑问及回答：____________
3、___________________?_________________________________Ihaven’twrittenmypostcard.Haveyouwrittenyourpostcard?Yes,Ihave./No,Ihaven’t.Ihaven’tfinishedmyhomework.Haveyoufinishedyourhomework?Yes,Ihave./No,Ihaven’t.Ihavefinishedmyhomework.2)用现在完成时连词成句I,finish,homework(2)动词的过去分词：规则变化与不规则变化fin
4、ish----finished----finishedlive----lived----livedstop----stopped---stoppedcarry----carried----carried1加ed，2加d，3要双写，4注意，y变成ied特殊形式特殊记。1.规则变化与过去式相同;2.不规则变化am,isarebecomecutdoflygokeeprunwas--beenwere--beenbecame—becomecut-cutdid--doneflew--flownwent--gonekept--keptran--runwritedrivecom
5、ebuybringtakemakesitfeedwrote--writtendrove--drivencame--comebought--boughtbrought--broughttook--takenmade--madesat--satfed--fed二、现在完成时的主要用法（一）--It’ssodark.--Someonehasturnedoffthelight.(有人刚把灯关了,对现在造成的结果是:现在很黑)--Areyoufree?--Ihavefinishedmyhomework.Iamfree.(我已经完成了家庭作业,对现在造成的结果是很有空)1.
6、用法表示过去发生的某一动作对现在造成的影响或结果。汉语中常用“已经”、“过”、“了”等表达,通常与表示包括现在在内的时间副词just，already,before,yet,never,ever,sofar,recently等状语连用。例如：①Ihaveneverheardofthatbefore.②Haveyoueverriddenahorse?③Shehasalreadyfinishedthework.④Haveyoumilkedthecowyet?Yes,Ihavedonethatalready.⑤I’vejustlostmymathbook.2.常用时间状
7、语already和yet的用法already已经通常用于肯定句中或句末yet已经，还通常用于疑问句和否定句末我已经找到了我的尺子。Ihave______foundmyruler.Ihavefoundmyruler________.否定句:Ihaven’tfoundmyruler______.一般疑问句:Haveyoufoundyourruler____？alreadyalreadyyetyet练一练1.我已经看过这部电影。I____________________thefilm.2.你已经浇过花了吗？______youtheflowers______?3.他刚刚
8、完成了家庭作业。He__
