语法现在完成时态课件.ppt

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1、PresentPerfectTense(现在完成时态）Designer:Zhuangyajuan现在完成时的主要用法上一页下一页1)--It’ssodark.--Someonehasturnedoffthelight.2)--Areyoufree?-Ihavefinishedmyhomework.Iamfree主菜单1.表示___发生的某一动作对____的影响或结果。上一页下一页IhavelearntEnglishformorethantenyears.Shehasswumsincehalfanhourago.现在完成时的主要用法主菜单2.表示____已经

2、开始,持续到___的动作或状态,可以和表示从过去某一时刻延续到现在的一段时间的状语连用.(常与since+过去的时间点，for+一段时间连用。)3.表示人___(ever)过或到目前为止从_____(never)的经历.上一页下一页IhaveeverbeentotheSummerPalace.Ihaveneverhadacar.现在完成时的主要用法主菜单即学即练判读下列各句属于现在完成时的哪种用法。A.影响，结果B.持续，延续C.经验，经历1.IhavebeentoShanghaitwice.()2.Ihavefinishedmyworkalready.(

3、)3.I’velivedinZhuaoguangfor10years.()CABPresentperfecttense现在完成时构成:时间状语：常与①already,②never,③ever,④just,⑤yet,⑥before,⑦uptonow,⑧sofar,⑨inthelast/pastfewweeks⑩thesedays,⑾since⑿foralongtimehave/has+过去分词for+时间段since+时间点(段时间+ago)since+句子（过去时）例如：Katehaslivedherefor3years.Katehaslivedheres

4、ince3yearsago.KatehaslivedheresinceshecametoChina.(高考中的填空题)选用for和since填空:1.Wehaven’tseeneachother______alongtime.2.HisfatherhasbeenintheParty______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severalyears

5、.forsinceforsincefor下一页上一页主菜单一般过去时&现在完成时的区别1.都表示过去发生的事2.现在完成时强调过去和现在的联系，不能和具体的时间状语连用.3.一般过去时强调过去发生的事或状态与表示过去的具体时间连用（last,ago,yesterday,etc.）presentpastIhavelivedherefortwoyearsIlivedthere2yearsagoIlostmypenyesterday.我昨天丢了钢笔。（强调昨天的动作）Ihavelostmypen.我把钢笔丢了。（强调现在的结果）Heworkedinthathos

6、pital8yearsago.我八年前在那家医院工作。（单纯指过去的动作）Hehasworkedinthathospitalfor8years.他在医院已经工作了八年了。（强调动作一直持续到现在）1)I______(see)TomlastFriday.2)Sofarthisyearwe_______(see)afallinhousepricesbybetween5and10percent.3)(2009.福建高考） —Whydoesthelakesmellterrible?—Becauselargequantitiesofwater_____.A.have

7、pollutedB.isbeingpollutedC.hasbeenpollutedD.havebeenpolluted【即学即练】sawDhaveseen巩固练习题1.单句改错(高考的短文改错)1)Judyisgoingtomarrythesailorshehasmetlastyear.(2008.重庆高考)2）Ihaveworkedheresince12years3)Itis/hasbeensixyearswhenIcamehere.去掉met之前的hasSince改成forWhen改成sinceExercisesIamanAmericanboy.Ic

8、ametoChinatwoyearsago.I_____(stud