UnitOnePastandpresentComicstrip&WelcometotheunitLearningaims:1.learnsomethingabouttransportatdifferenttimes2.Learntotalkabouttransportinthepastandatpresen3.Learnsomebasiclanguageaboutpresentperfecttense(现在完成时)Inthepast,(在过去过去)itwasapoorvillage.=Itusedtobeapoorvillage.（过去经常做某事）Atpresent,（现在）itbecomesarichcity.Ourlivingareashavechangedalot.WhataboutHoboandEddie?1.WhatisHobolookingfor?Heislookingforhisfood.2.WhereisHobo’sfood?Eddieateit.ListenandListenandanswer:answer:1.WhydidEddieeatHobo’sfood?2.IsHobohappy?3.WhatdoesHobothinkofEddie?4.WhydoesHobethinkso?ReadandReadandanswer:answer:Becausehewasveryhungry.No,heisn’t.HethinksEddieisnotkindnow./HethinksEddiehaschanged.BecauseEddiewaskindbefore.1.Eddie,haveyouseenmyfood?Eddie,你看见我的食物了吗？（你知道我的食物在哪儿吗？）baseform原形simplepast过去式pastparticiple过去分词seesawseenhave/has+过去分词[此结构为“现在完成时(presentperfecttense)”,表示过去的动作一直延续到现在，或与现在有一定联系]Somekeypoints(要点):baseform原形simplepast过去式pastparticiple过去分词eatateeaten2.I’vejusteatenit.（I’ve=Ihave)我刚刚把它吃了。现在完成时:haveeatenbaseform原形simplepast过去式pastparticiple过去分词changechangedchanged3.You’vechanged,Eddie.(You’ve=Youhave)你（已经）变了。现在完成时:havechangedbaseform原形simplepast过去式pastparticiple过去分词seesawseeneatateeatenchangechangedchangeduseusedusedHaveatry！(想一想，试一试)现在完成时:have/hasusedbaseform原形seehave/hasseeneathave/haseatenchangehave/haschangedusehave/hasusedHaveatry！(想一想，试一试)presentperfecttense现在完成时1.Eddie,haveyouseenmyfood?2.I’vejusteatenit.（I’ve=Ihave)3.You’vechanged,Eddie.(You’ve=Youhave)baseform原形simplepast过去式pastparticiple过去分词useusedused我已经使用这支钢笔长达两年了。Ithispenfortwoyears.haveusedHaveatry！(想一想，试一试)Hobo’sfood____inthe_____anhourago.Butitisn’ttherenow.Why?Eddiehasjust____itbecausehewas______.EddiethinksHobohas_______andheisnot_____now.wasbowleatenhungrychangedkindFillintheblanks:DanielDani...
