初二if条件句

1、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_if

2、you_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_.,st

3、udyhardlistentoteachercarefully.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

4、,_(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

5、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,_.,illplay

6、basketball,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

7、_.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_

8、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)enou

9、ghmoney.,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,

10、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,

11、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,ha

12、s,willtake,doesntrain,willgo,are,willplay,rains,wontgo,doesntwork,willfail,doesnthave,wontgo,ifyoudontleavenow,youwillbelateforschoolunlessyouleavenow,youwillbelateforschool.,ifnot,unless,1.youimproveyourhandwriting/youwilllosemarksintheexamifyoudontimproveyourhandwriting,unlessyouimproveyourhandwri

13、ting,1.youimproveyourhandwriting/youwilllosemarksintheexamifyoudontimproveyourhandwriting,youwilllosemarksintheexam.,2.youwillhavetoothache/youcleanyourteeth,ifyoudontcleanyourteeth,unlessyoucleanyourteeth,youwillhavetoothache.,3.thisroomwillgetveryhot/youputtheairconditioningonsoon,ifyoudontputthea

14、irconditioningonsoon,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,m

15、ust）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