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If引导的条件状语从句•引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。•If的位置：If引导的条件状语从句放于句首时多用逗号隔开；在句中则不需要用逗号。Ifyouarefree,welcometomyhome.Welcometomyhomeifyouarefree.用法：1、主祈从现Ifyouwanttogetgoodmarks,dowhat?Don’tdowhat?•Ifyouwanttogetgoodmarks,__________.•Ifyouwanttogetgoodmarks,•don’t__________.studyhardlistentoteachercarefully.dohomeworkbyyourself.copyyourhomework.talkintheclasscheatintheexamsTherewillbesomethingnew,solistentomecarefully!!!Ifitisfinetomorrow,wewillgoonaschooltrip.IwillgotoBeijingUniversity.IfIstudyhard,Ifhehasenoughmoney,Hewilltravelaroundtheworld.Ifheplayscomputergamesallthetime,whatwillhappen?He’llbeverytiredinclassHisparentswillbesad.Hewon’tgetgoodgrades.总结：观察下列句子的结构•Ifitisfinetomorrow,wewillgoonaschooltrip.•IfIstudyhard,IwillgotoBeijingUniversity.•Ifhehasenoughmoney,hewilltravelaroundtheworld.•Ifheplayscomputergamesallthetime,hisparentswillbesad.•我们之前学过的If引导的条件状语从句，主句都是祈使句，也就是无主句，所以，主句的时态多为现在时；Ifyouwanttoleave,waitforthebus.Ifyouwanttoleave,youwillwaitforthebus.现在，我们接触到的条件状语从句，主句开始有了主语，所以时态发生了变化,也就是说：GrammarFocus用法：2、主将从现（主句有主语）if…S+will/won’t考点：Ifitrainstomorrow（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.1IfI_______________(notunderstand）,Iwillaskmyteacherforhelp.2IfI__________(copy)yourhomework,Iwillcheatmyself.3Ifshe_______________(notget)upearly,she’llmisstheearlybus.4Ifyourmother_______(buy)thebookforyou,itwillbegoodforyourstudy.don’tunderstandcopydoesn’tgetbuys5.Ifyou____________(notwork)hard,you_________(notpass)theexam.6.Ifshe________(mend)thecomputer,herfather___________(notblame).7.Ifyourbrother____________(break)thewindow,hewillfeelverysorryforthat.8.Ifthecomputer(notwork),menditplease.don’tworkwon’tpassmendswon’tblamebreaksdoesn’twork9.Ifshe_______(notbe)interestedinmath,shewillfinditveryboring.10.Ifyou_________(get)highscores,yourparentswillbeproudofyou.11.Ifyou_________(be)happy,wewillbehappy.12.Ifshe(translate)thesentencewordbyword,she________(get)itstruemeaning.isn’tgetaretranslateswillget1.Ifyou_____totheparty,you’llhaveagreattime.A.willgoB.wentC.goD.going2．I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asksCD3.–Whatareyougoingtodotomorrow?--We’llgotothelibrarytomorrowifit___.A.isn’trainB.rainC.won’trainD.doesn’train4.Whatwillyoudoifyou_____totheoldfolk’shomevisit?A.goB.wentC.goingD.willgoADHaveatry用括号内所给词的正确形式填空1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.5.Ifshe____(be)kindtome,I__________(notargue)withher.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.7.Ifyou_____(pay)moreattentiontothat,he_________(notget)injured.goeswillhavestopshavewon’tgetdoiswon’targuecomescomeswillgivepaywon’tgetSummary•1.如果主句是祈使句，从句同样要用一般现在时。（主祈从现）IfhecomesnextSunday，pleasecallme.•2.如果主句(有主语)是一般将来时，从句则用一般现在时。（主将从现）Ifitrains（从句），Iwillstayathome.HomeworkFinishthepaper.Thankyou!