初二if条件句

If引导的条件状语从句（主现从现）Ifyouheatit，snowturnsintowater.条件句表事实,主句常用现在时1.Ifyou________ice,it______intowater.(heat/turn)2.Aballoon________ifyou_______apinintoit.(burst/stick)3.Ifyou________steam,it________intowater.(cool/turn)4.Metal_______ifyou______it.(melt/heat)5.Wood_______ifyou______itintowater.(float/put)6.Aglass_______ifyou_____it.(break/drop)heatmeltsputfloatsdropbreaksturnsburststurnsheatcoolstick•1.主祈从现•2.主情（can，may，should，must）从现•3.主将从现if…will/won’t祈使句+if条件状语从句If条件状语从句，+祈使句if条件状语从句要用一般现在时。句型结构时态1.主祈从现Ifyouwanttogetgoodmarks,dowhat?Don’tdowhat?•Ifyouwanttogetgoodmarks,__________.•Ifyouwanttogetgoodmarks,•don’t__________.studyhardlistentoteachercarefully.dohomeworkbyyourself.copyyourhomework.talkintheclasscheatintheexams1.主祈从现Completethesentenceswiththecorrectformofthewords.1.Ifyou_______(listen)tothemusic,_____(buy)aCD.2.Ifhe______(be)lateforschool,______(notwait)forhim.3.Ifyou____(buy)anewcamera,____(get)agoodone.4.Ifthelight____________(notcome)on,____(wait)foroneminute.isbuygetdoesn’tcomewaitdon’twaitlistenbuyIfyoufeelhungry,youshouldeatsomething.Ifyoufeeltired,youmusthavearest.2.主情从现Ifyouareill,youshouldgotoseeadoctor.Ifyouareridingabikeinthestreet,youmustbeverycareful.2.主情从现（主将从现）Ifitishot,wewillgoswimming.条件句表可能,主句多用将来时；PlayaguessinggameWhatwillhappenifItouch(触摸)it?Ifyoutouch(碰）it,itwill______getangrycrydancesmileIfI’mhungry,Iwill______________.IfI’mtired,Iwill_____________.eatsomefoodhavearest3.主将从现IfI’mill,__________________.IwillseeadoctorIfI’mlate,_________________.Iwillsaysorry3.主将从现Ifitrainstomorrow,I_____________________.willwatchTVathomeIfit_____________tomorrow,________________.I’llplaybasketballdoesn’trainIwon’t________________.playbasketball•if条件句不一般,几个要点记心间。•条件句放在前,逗号要放句中间。•条件句表可能,主句多用将来时；•条件句表事实,主句常用现在时。•if条件句有特点,现在时把将来替；•这个规则要牢记!if条件句歌诀（一般现在时）（一般将来时）（一般现在时）（一般将来时）主将从现Ifyoudoit,youwillbehappy.You’llbehappyifyoudoit.Whatwillyoudoifyou’rehappy?•IfI’mhappy,Iwill____________.•IfI’mhappy,Iwill____________.•IfI’mhappy,Iwill____________.•IfI’mhappy,Iwill______________.clapmyhandsstampmyfeetwinkmyeyesnodmyhead1.Ifitrainstomorrow,we_____visitthemuseum.Adon’tdoBwon’tgoCaren’tgoDdidn’tgo.2Willyougototheparkifit____fine?AwillbeBwasCisD/3.IfI____toomuchTV,mymotherwill_______.Awatch,angryBwatched,beangryCwatch,beangryDwillwatch,beangryBCC4Ifyou_____toschoollate,yourteacher_____angrywithyou.Acome;areBcome,willbeCwillcome;areDwillcome;willbe5Ifyou_____hard,youwill___successful.Awork,areBworks,isCtowork,beDwork,beBD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.goeswillhavestopshave4.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.won’tgetdoiswon’targuecomescomeswillgivepaywon’tget1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.goeswillhavestopshavewon’tgetdocomeswillcomewillgive1.Ifhe_______(feel)well,he_______(go)toworktomorrow.2.Ifmymother_______(have)time,she________(take)metothemuseum.3.Ifit__________(notrain)tomorrow,they__________(go)foranouting.4.Ifthey_________(be)free,they____________(play)afootballmatch.5.Ifit_________(rain),we________(notgo)out.6.Ifhe__________(notwork)hard,he_________(fail)intheexam.7.Ifhe_____________(nothave)time,he__________(notgo)tothemuseum.feelswillgohaswilltakedoesn’trainwillgoarewillplayrainswon’tgodoesn’tworkwillfaildoesn’thavewon’tgoIfyoudon’tleavenow,youwillbelateforschoolUnlessyouleavenow,youwillbelateforschool.ifnotunless1.Youimproveyourhandwriting/youwilllosemarksintheexamIfyoudon’timproveyourhandwriting,Unlessyouimproveyourhandwriting,1.Youimproveyourhandwriting/youwilllosemarksintheexamIfyoudon’timproveyourhandwriting,youwilllosemarksintheexam.2.youwillhavetoothache/youcleanyourteethIfyoudon’tcleanyourteeth,Unlessyoucleanyourteeth,youwillhavetoothache.3.thisroomwillgetveryhot/youputtheairconditioningonsoonIfyoudon’tputtheairconditioningonsoon,Unlessyouputtheairconditioningonsoon,thisroomwillgetveryhot.4.youkeepice-creaminafridge/itmeltsIfyoudon’tkeepice-creaminafridge,Unlessyoukeepice-creaminafridge,itmelts.•总结1、主现从现(条件句表事实)Ifyouheatit,snowturnsintowater.2、主将从祈Ifyouwanttogetgoodmarks,studyhard.3、主情（can,may,should,must）从现Ifyoufeeltired,youmusthavearest.4、主将从现(条件句表可能)if…will/won’tIfitishot,wewillgoswimming.Ifyoudon’tcleanyourteeth,youwillhavetoothache.Unlessyoucleanyourteeth,youwillhavetoothache.Ifhe______back,pleaseletmeknow.Doyouknowifhe______backnextweek?comecomeswillcomeIf在条件状语从句中表示如果，在谓语动词之后引导宾语从句表示是否，相当于whether。if的用法2.引导条件状语从句：译为“如果，假如”(1)if从句+祈使句(2)if从句+主句（一般将来时）1.引导宾语从句：“是否”，表不确定的概念。Idon’