Uunit3Grammar1.ppt

Unit3Grammar1,一般过去时表示在过去某个时间发生的动作或存在的状态，也表示过去经常或反复发生的动作。e.g.Hecamehereyesterday.2.现在完成时表示过去的动作（或者状态）对现在产生的影响和结果。e.g.Hehasbrokentheglass.,Differences:构成不同（1）TomwenttoLondonlastyear.(2)LilyhasbeentoLondontwice.一般过去时谓语动词用动词的过去式。现在完成时谓语动词用“助动词have/has+过去分词”,2.用法不同（1）Ihadsupperanhourago.我一小时前吃的晚饭。（表示过去的动作）（2）Ihavejusthadsupper.我刚刚吃过晚饭。（强调对现在的影响我不饿）（3）Hewasateacherthen.他那时是个教师。（表示过去的状态）（4）Hehasbeenateachersincethen.他从那时起一直当教师。（他现在还是教师）,2.用法不同e.g.1.Wehaventseemhimsincelastyear.我们自从去年以来一直未见到他。（现在还未见到）2.Wedidntseehimlastyear.我们去年没见到他。（现在不一定未见到）3.Whohasopenthedoor?谁把门开了？（现在门还开着）4.Whoopenedthedoor?谁开的门？（指过去，和现在无关。）（现在不知道门开的还是关的）,3.具体的时间状语（1）一般过去时的时间状语Yesterday,once,lastweek,.ago,in1980,inOctober,justnow等。（2）现在完成时的时间状语for,since,sofar,ever,never,just,yet,till,uptonow,等。,Fillintheblanks:LastSunday,Tedandhisfather_(be)athome.They_(move)toanewhouse.Hisfather_(want)toputthebooksinsomeboxes,buthe_(cannot)findanyboxes.Ted_(tell)himtheboxes_(be)inthenextroom.Thenhe_(bring)theseboxestohisfather.,were,moved,wanted,told,couldnt,were,brought,1,IsTomdoinghishomework?No,he_(finish)hishomework.2.DoyouknowMissKing?No,butI_(hearof)herbefore.3.Whataboutthefilm?Sorry,Idontknow.I_(notsee)ityet.4._youever_(be)totheGreatWall?No,never.5.Helpyourself,please.No,thanks.Iamfull.I_just_(eat)threeeggs.,hasfinished,haveheardof,haventseen,Have,been,have,eaten,FinishPartAan