初二if条件句.ppt

Unit5Ifyougototheparty,youwillhaveagreattime.,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,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),heat,melts,put,floats,drop,breaks,turns,bursts,turns,heat,cool,stick,1.主祈从现2.主情（can，may，should，must）从现3.主将从现ifwill/wont,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?Dontdowhat?,Ifyouwanttogetgoodmarks,_.Ifyouwanttogetgoodmarks,dont_.,studyhardlistentoteachercarefully.dohomeworkbyyourself.,copyyourhomework.talkintheclasscheatintheexams,1.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.,is,buy,get,doesntcome,wait,dontwait,listen,buy,Revision,Ifyoufeelhungry,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；,Playaguessinggame,WhatwillhappenifItouch(触摸)it?,Ifyoutouch(碰）it,itwill_,getangry,Willit?,cry,dance,smile,IfImhungry,Iwill_.,IfImtired,Iwill_.,eatsomefood,havearest,3.主将从现,IfImill,_.,Iwillseeadoctor,IfImlate,_.,Iwillsaysorry,3.主将从现,Ifitrainstomorrow,I_.,willwatchTVathome,Ifit_tomorrow,_.,Illplaybasketball,doesntrain,Iwont_.,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,从句,主句,，,主句,从句,（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.,Youllbehappyifyoudoit.,Whatwillyoudoifyourehappy?,IfImhappy,Iwill_.IfImhappy,Iwill_.IfImhappy,Iwill_.IfImhappy,Iwill_.,clapmyhands,stampmyfeet,winkmyeyes,nodmyhead,1.Ifitrainstomorrow,we_visitthemuseum.AdontdoBwontgoCarentgoDdidntgo.2Willyougototheparkifit_fine?AwillbeBwasCisD/3.IfI_toomuchTV,mymotherwill_.Awatch,angryBwatched,beangryCwatch,beangryDwillwatch,beangry,B,C,C,4Ifyou_toschoollate,yourteacher_angrywithyou.Acome;areBcome,willbeCwillcome;areDwillcome;willbe5Ifyou_hard,youwill_successful.Awork,areBworks,isCtowork,beDwork,be,B,D,用括号内所给词的正确形式填空,1.Imsureifhe_(go)totheparty,he_(have)agreattime.2.Iftherain_(stop)tonight,wewillgotothecinema.3.IllbuyacomputerifI_(have)enoughmoney.,goes,willhave,stops,have,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.,wontget,do,is,wontargue,comes,comes,willgive,pay,wontget,1.Imsureifhe_(go)totheparty,he_(have)agreattime.2.Iftherain_(stop)tonight,wewillgotothecinema.3.IllbuyacomputerifI_(have)enoughmoney.4.You_(notget)nervousifyou_(do)enoughexercise.6.Iwanttoknowifhe_(come)tomorrow,ifhe_(come),I_(give)themassagetohim.,goes,willhave,stops,have,wontget,do,comes,willcome,willgive,Ifhe_(feel)well,he_(go)toworktomorrow.Ifmymother_(have)time,she_(take)metothemuseum.Ifit_(notrain)tomorrow,they_(go)foranouting.Ifthey_(be)free,they_(play)afootballmatch.Ifit_(rain),we_(notgo)out.Ifhe_(notwork)hard,he_(fail)intheexam.Ifhe_(nothave)time,he_(notgo)tothemuseum.,feels,willgo,has,willtake,doesntrain,willgo,are,willplay,rains,wontgo,doesntwork,willfail,doesnthave,wontgo,Ifyoudontleavenow,youwillbelateforschoolUnlessyouleavenow,youwillbelateforschool.,ifnot,unless,1.Youimproveyourhandwriting/youwilllosemarksintheexamIfyoudontimproveyourhandwriting,Unlessyouimproveyourhandwriting,1.Youimproveyourhandwriting/youwilllosemarksintheexamIfyoudontimproveyourhandwriting,youwilllosemarksintheexam.,2.youwillhavetoothache/youcleanyourteeth,Ifyoudontcleanyourteeth,Unlessyoucleanyourteeth,youwillhavetoothache.,3.thisroomwillgetveryhot/youputtheairconditioningonsoon,Ifyoudontputtheairconditioningonsoon,Unlessyouputtheairconditioningonsoon,thisroomwillgetveryhot.,4.youkeepice-creaminafridge/itmelts,Ifyoudontkeepice-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)ifwill/wontIfitishot,wewillgoswimming.Ifyoudontcleanyourteeth,youwillhavetoothache.Unlessyoucleanyourteeth,youwillhavetoothache.,Ifhe_back,pleaseletmeknow.Doyouknowifhe_backnextweek?,come,comes,willcome,If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。,summary,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。,Idontknowifyourfathercancometogether.Canyoutellmeifmissyourparents?,e.g.IfIwere