教学观摩课暨课改教学研讨课RevisionIfyouarehappy,whatwillyoudo?Ifyoubecomesad,whatwillyoudo?Sheisdoingherhomework.Ifyouplaycomputergamesonweekdays,Shewillbelate.1)条件状语从句通常由if或unless(=ifnot)引导，从句中常用一般时代替将来时，即if或unless后的句子谓语用一般现在时。但是，主句则通常用将来时，情态动词或祈使句。1.如果主句是一般将来时，从句则用一般现在时。Ifitrains（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时。Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，从句同样要用一般现在时。Don’tgoandplayfootballifyoudon’tfinishyourhomework.PleasecallmeifhecomesnextSunday.If引导条状语从句时，从句中用一般现在时代替一般将来时。Ifyouarefreethisweekend,whatwillyoudo?Ifyouwanttogetgoodmarks,dowhat?Don’tdowhat?Ifyouhaveenoughpocketmoney,whatwillyoubuy?IfyouinviteforeignerstoChina,wherewillyougo?GameRulesIf条件句的替代形式：（1）祈使句+and/or+陈述句（谓语动词通常用将来时态）。其中，and表示句意顺承；or表示转折，意为“否则”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.（2）用介词with,without的替代形式：e.g.Ifthereisnowater,thefishmaydie.=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.=Withyourhelp,I’llfinishmytaskontime.Activity1Rewritethesentenceswithif:Activity2.Completethesentencesif引导的条件状语从句和if引导的宾语从句的区分:2.if在从句中的位置不同3.时态要求上有区别找出下列句子中哪些是if条件状语从句，哪些是if宾语从句If引导的条件状语从句的练习5.Ifyou____________(notwork)hard,you_________(notpass)theexam.6.Ifyourbrother____________(break)thewindow,hewillfeelverysorryforthat.7.Ifthecomputer(notwork),menditplease.8.Ifshe_______(notbe)interestedinmath,shewillfinditveryboring.9.Ifyou_________(get)highscores,yourparentswillbeproudofyou.10.Ifyou_________(be)happy,wewillbehappy..Iwanttoknowifhe_______(come)tomorrow,ifhe_______(come),I__________(give)themessagetohim.summaryHomeworkIfyouarehappy1.Ifyou_____totheparty,you’llhaveagreattime.A.willgoB.wentC.goD.going2．I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asks5.IfIeat____food,I’llbeveryfat.A.toomanyB.manyto