Unit4 Adversity and Courage Discovering Useful Structures课件-【知识精研】人教版英语选择性必修第三册.pptx

DiscoverUsefulStructuresUnit4AdversityandCourage

现在完成进行时结构常用的时间状语12现在完成进行时VS.现在完成时34用法

Observeanddiscover：1.ThisistheadventurethatIhavebeendreamingof.2.Wearenowcampedonthericeandwehavebeenmanagingtosurvive...3.Thedoghasbeenbarkingforabouttwohours.Ireallyhopeitwillstopsoon.1.观察以上例句，归纳出现在完成进行时的结构：。2.写出现在完成进行时的不同句型：肯定句否定句一般疑问句特殊疑问句have/has+been+doing主语+have/hasbeen+doing...主语+have/hasnotbeen+doing...Have/Has+主语+been+doing...?疑问词+have/has+主语+been+doing...?一、现在完成进行时的结构

IhavebeenlearningEnglishsinceIwas8yearsoldandIstillloveit.learn8yearsagofuturenow1.过去动作持续到现在，还将持续下去。二、现在完成进行时的用法learnlearn

Gosh,isanybodyinit?Ihavebeenknockingatthedoorforhalfanhour!Gosh,isanybodyinit?Ihavebeenknockingatthedoorforhalfanhour!pastfuturenowknockknockknock2.表示动作从过去到现在的时间内重复发生但有可能间断。

1.---IamsorryIhavekeptyouwaitingsolong.---Itisallright.Ihavebeenreadingthenewspapers.2.Wehavebeenwaitingforyouforhalfanhour.3.表示说话之前刚刚结束的动作，并且动作不再继续。二、现在完成进行时的用法pastnowwaitingstartedarrivefuture

Oh,youhavecomeatlast!Ihavebeenwaitingforyoufortwohours.Hereyouare!Sorry.Imlate.Oh,youhavecomeatlast!Ihavebeenwaitingforyoufortwohours.Hereyouare!Sorry.imlate.pastfuturenowwait4.表示某种强烈的感情色彩,如：赞赏、不满、批评、愤怒等。

Lookdiscover:①Aprivatedetectivehasbeentailing(跟踪)himforseveralweeks.②Tomlovesoutdooractivities-hehasbeenfishingandhuntingsincehewasachild.三、常用的时间状语

现在完成进行时常与以下表示“持续”的时间状语连用：for+时间段,since+过去时间/句子（时态用过去时）（与since或for连用时，动作常会继续下去）thisweek,thismonth,thesedays...allday,allthemorning,allthetime,allthisweek...recently,lately,uptonow,tillnow,sofar,during...over/inthepast/lastfewyears,fromthestart...

Theboy__________________(eat)sincefiveminutesago.hasbeeneating(1)Theboystartedeati