when-as-while区别珍藏版-ppt

用when,while,as填空。1)______________Iwaswalkingdownthestreet,Inoticedapolicecarinfrontofthestore.2)_________Johnarrived,Iwascookinglunch.3)_______hegrewolder,helostinterestedineverythingexceptgardening.When/While/AsWhenAsA:从(延),主(短)三通用B.从(短),主(延)只用when;表“正在做某事，这时发生另件事”,只用when.表after,before,if，assoonas等含义,只用when.Whenyouhavefinishedyourwork,youmayhavearest.C.主从都(延)唯while;然而(对比);既然(让步);只要(aslongas)D.主/从同时选as(一边…一边…;随着…)Shesangsongsasshedidherhomework.(不和状态动词连用)Aswetalkedon,hegotmoreandmoreexcited.随着我们继续往下谈,他越来越兴奋。E.主从皆短先as(when也可,但不常用)Ithoughtofitjustas/whenyouopenedyourmouth.4)Howcanhegetgoodgrades________hewon’tstudy?5)Iwaswanderingthroughthestreet______Icaughtsightofatailor’sshop.6)_______Ibelieveheishonest,Idon’tlikehim.7)Helikesreading,______hissisterlikeswatchingTV.whenwhenWhilewhile8.____modelingbusinessisbynomeanseasytogetinto,thegoodmodelwillalwaysbeindemand.A.WhileB.SinceC.AsD.If9.Just_____hecaughttheball,therewasatearingsound.撕裂的A.WhileB.SinceC.AsD.If10._________Istoppedmycar,amancameuptome.A.WhileB.SinceC.AsD.WhenACC/D