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If（如果）条件状语从句,主将从现,Shewillbelate.,Ifshe_toschool,she_late.,Sheisgoingtowalktoschool.,walks,will,be,Lead-in,Itisgoingtoraintomorrow.,Iwillstayathome.,Ifit_tomorrow,I_athome.,rains,will,stay,Ifit_sunnytomorrow,they_atrip.,Itwillbesunnytomorrow.,Theywillhaveatriptomorrow.,is,can,have,Hewontstudyhard.,Hewillfailintheexam.,“Ifhe_studyhard.He_intheexam.”,doesnt,will,fail,1.Ifshewalkstoschool,shewillbelate.=Shewillbelateifshewalkstoschool.2.Ifitrainstomorrow,Iwillstayathome.=3.Ifitdoesntraintomorrow,theycantakeatrip.=4.Dontgotothemoviesifyoudontfinishyourhomework.=5.Shemustgotothedoctorifhastheflu.=6.Shewontgetgoodgradesifsheislazy.=,条件状语从句：,一、定义：条件状语从句用来说明主句发生的条件。常用If（如果）来引导。二、位置：条件状语从句可以在主句之前，也可位于主句之后。三、主从句时态关系：1。主将从现：主句一般将来时，从句用一般现在时2。主祈从现：主句为祈使句，从句用一般现在时3。主情从现：主句含情态动词，从句用一般现在时,1.CallmeifTina_(willcome/comes).,comes,2.Shemustseeadentistifshe_(has/willhave)atoothache.,has,3.Haveagoodrestifyou_(willbe/are)tired.,are,你来选一选：,4.Youcangoshoppingwithyoursisterifyou_(have/willhave)timethisafternoon.,have,5.Ifthere_(willbe/is)acaraccident,they_(willcall/call)110atonce.,is,willcall,2.Ifit_(be)coldtomorrow,Iwillwearmysweater.,3.Hecangohomeifhe_(finish)hishomework.,finishes,1.Putupyourhandsifyou_(have)anyquestions.,have,is,趁热打铁,小试牛刀：,1.Ifit_tomorrow,We_athome.(如果明天下雨，我们将待在家里)2.Theycantleaveschool_they_theclassroom.(如果他们不打扫教室，他们就不能离开学校。)3.Ifhe_toolate,he_late.(他如果起床太晚，就会迟到。)4.Pleasetellme_he_tomorrow.（如果他来，请告诉我。）,rains,willstay,If,dontclean,getsup,willbe,if,comes,ifwillshe,callme,I,tellheraboutit,Ifshecallsme,Iwilltellheraboutit.,模仿秀：,he,come,nextweekend,I,tellyou,Ifhecomesnextweekend,Iwilltellyou.,notrain,gohiking,thisafternoon,Ifitdoesntrain,Iwillgohikingthisafternoon.,nowar,theworld,morebeautiful,Ifthereisnowar,theworldwillbemorebeautiful.,he,havefreetime,gotoShanghai,Ifhehasfreetime,hewillgotoShanghai.,
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