2014现在完成时详细讲解

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1、现在完成时详细讲解一、概念：现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果,也可表示过去已经开始,一直延续到现在的动作或状态。二、基本结构Ihaveseenthatfilm.Hehasseenthatfilm.主语+have或has+动词过去分词+其他一般疑问句：Haveyouseenthatfilm?Yes,Ihave.No,Ihaven’t.Hasheseenthatfilm?Yes,hehas.No,hehasn’t.否定句：Ihaven’tseenthatfilm.Hehasn’tseenthatfilm.三、一般过去时和现在完成时对比I

2、taughtinthisschooltenyearsago.十年前我在这个学校教书。（现在是否在这个学校教书不知道，只是十年前发生的事情)叙述了过去某个时间发生了一件事情Ihavetaughtinthisschoolsincetenyearsago.（自从十年前我在这就已经在这个学校教书了，言外之意现在还在这个学校教书，一直延续到现在）叙述了过去发生的事情一直延续到现在。Theydidtheirhomeworkanhourago.(半小时前他们做他们的家庭作业，现在干什么不知道。)Theyhavedonetheirhomeworksinceanhourago.

3、（自从半小时前他们已经做他们的家庭作业，言外之意现在还在做家庭作业，一直延续到现在。）四、练习1.Shehaseatenabananaalready.___________________________________(一般疑问句，并作否定回答)_______________________________________________________（否定句）2.TheyhavecomebackfromAmericaalready.3.IhavestudiedEnglishforsixyears.4.LucyandLilyhavestayedheresi

4、ncetwohoursago.5.Lucyhasstayedatschoolfortwoweeks.86.Ihaveworkedherefortwoweeks.7.Nickhasbeenateacherforfiveyears.8.Lilyhashadbreakfast.A.用already或yet1)Havetheytakendowntheoldpictures______?No,not_________.2)Mostofushavefinishedourcompositions________3)Hesaidhehadn’tvisitedtheexhibi

5、tion________.B.用since或for1)Wehavelearnedfivelessons______thebeginningofthisterm.2)MrsLiaohasbeeninhospital______lastweek.3)Shehasbeenhere        lastWednesday．4)WehavestudiedEnglish        twoyears．5)Hehaslivedhere        heleftShanghai．6)Theyhaveknowneachother        aboutfivemonth

6、s．7)MissZhaohasworkedinthefactory        tenyearsago.8)Ihavestayedatmyaunt’s_____twoweeks.I.用所给动词的适当形式填空。I____already____(see)thefilm.I___(see)itlastweek.___he____(finish)hisworktoday?Notyet.___you____(be)toHongKong?Yes,I_____(be)theretwice.____youever____(eat)chocolatesundaes?No,ne

7、ver.Myfather____just____(come)backfromwork.Heistirednow.Where’sLiMing?He____(go)totheteacher’soffice.Shanghai___(be)asmalltownhundredsofyearsago.Nowit____(become)alargecity.I____(work)heresinceI____(move)herein1999.SofarI____(make)quiteafewfriendshere.Howlong____theWangs____(stay)he

8、re?Fortwoweeks.8II.