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1、Unit6Topic3Bicyclesarepopular.If引导的条件状语从句一、位置(可前可后,在前用逗号和主句隔开)如果他在家，请给我打电话。Ifheisathome,pleasecallme.=Pleasecallmeifheisathome.二、时态要呼应（1）主句:现在时;从句:现在时。如果你到那儿了，给我打电话。Pleasecallmeifyougetthere.如果你努力学习，你会通过考试的。Ifyouworkhard,youcanpasstheexam.（祈使句）（情态动词）（2）主句:一般将来;从句:一般
2、现在时表将来。如果明天是晴天，我们会去野餐。Ifitissunnytomorrow,wewillhaveapicnic.如果我有时间，我会去看电影。IwillgotoseeafilmifIhavetime.（3）主句:用过去时;从句:过去的某种时态。那时如果我再努力点，我可以通过考试。IfIworkedharderthen,Icouldpasstheexam.三、句型转换主语为you的条件状语从句可与“祈使句,and/or…”相互转换。and:顺承关系，or:转折关系。如果你再努力些，你可以学好英语。Ifyouworkhard
3、er,youcanlearnEnglishwell.=Workharder,andyoucanlearnEnglishwell.如果你不快点，就赶不上火车了。Ifyougetuplate,youwillmissthetrain.=Don’tgetuplate,oryouwillmissthetrain.一、改错Ifeveryonewillobeytheclassrules,ourclasswillbecomeoneofthebestclasses.Runfaster,oryouwillcatchthebus.Icometose
4、eyou,ifIhavetime.We’lltraveltoShanghaiifitwillbefinenextweek.Worksharder,oryou’llfailintheexam.obeysandyouwillcatchthebus.willcometoseeyou,ifIhavetime.isWork1.Ifyou_____totheparty,you’llhavefun. A.willgoB.wentC.goD.going2.I____hertheanswerifshe____me. A.cantell,wi
5、llaskB.willtell,willask C.wouldtell,askD.willtell,asks3.-We’llgotothelibrarytomorrowifit____. A.isn’trainB.rainC.won’trainD.doesn’train4.Iwanttoknowifshe________nextweek.A.comesB.willcomeC.comeD.tocomeCDDBThetrafficis___________.busyheavycrazyThetrafficincitiesis_
6、____________thatinthecountryside.busierthanThetrafficinthecountrysideis_____________thatincities.notas/soheavyaspassengersatrafficaccidentIfatrafficaccidenthappens,passengerswillgethurt.Ifweobeythetrafficrules,therewillbefeweraccidents.Cyclingcan_____________saveene
7、rgyCyclingdoesn’t_____________causeairpollutionManypassengerswerehurtinthetrafficaccidentyesterday.()TrafficinBeijingisverygood.()Michaelrideshisbikelessthanbefore.()4.Cyclingdoesnotcauseairpollution()5.Itisnoteasytoparkbikes.()TFFTFFindoutthephrasesin1a看见一起交通事故受伤习惯
8、于…害怕骑自行车感到更自信一点遵守交通规则节约能源导致空气污染停放自行车atrafficaccidentbehurtgetusedto…beafraidofridingbikesfeelalittlemoreconfidentobeythetrafficrulessaveen
