if条件状语从句-语法

If从句条件状语从句WhatwillIdoifitissunnythisweekend?Part1:If的用法1.Iwanttoknowifhewillgotoparkwithus.2.Wewillhaveapicnicifitdoesn’train.3.Ifyouboilwater,itbecomessteam.4.Ifyoufeeltired,youmusthavearest.宾语从句条件状语从句语法1：if作为宾语从句的引导词，引导宾语从句。（是否）语法2：if（如果）引导的条件状语从句❀if用于宾语从句中原句式引导词从句语序一般疑问句whether/if改为陈述句语序由从属连词whether,if引导的宾语从句e.g.1.Iwanttoknow__________________________________.（他是否跟我们一起去公园）2.Askhim_____________________.（他是否能来）3.Ididn’tknow___________________________.（是否要下雨）if(whether)hewillgototheparkwithuswhether(if)hecancomewhetheritwasgoingtorainornot当句末为ornot时，引导词只能用whether而不能用if.If与whether的区别1.Idon’tknow_____hewillcomeornot.2.Idon’tcareof______heishandsome.3.Hewondered______tostayherethenextweek.4.____hewillcomeisnotdecided.与ornot连用只能用whether介词后只能用whether与todo不定式连用只能用whether作主语只能用whetherIf引导条件状语从句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’twaitlistenbuy祈使句+if条件状语从句if条件状语从句，+祈使句（从句后加逗号）if条件状语从句要用一般现在时。句型结构时态If条件状语从句（1）Whatwillyoudoifyou’rehappy?IfI’mhappy,Iwill____________.IfI’mhappy,Iwill____________.IfI’mhappy,Iwill____________.IfI’mhappy,Iwill______________.clapmyhandsstampmyfeetwinkmyeyesnodmyheadIfI’mhungry,Iwill______________.IfI’mtired,Iwill_____________.LookandsayeatsomefoodhavearestIfI’mill,__________________.IwillseeadoctorLookandsayIfI’mlate,_________________.IwillsaysorryIfitrainstomorrow,I_____________________.willwatchTVathomeIfit_____________tomorrow,________________.I’llplaybasketballdoesn’trainIwon’t________________.playbasketballIfitissunnythisweekend,whatwillyoudo?Ifitissunnythisweekend,I__________footballwithmyclassmates.Ifitissunnythisweekend,I__________.willplayIfitissunnythisweekend,whatwon’tyoudo?Ifitissunnythisweekend,I_____________________.Ifitissunnythisweekend,I_____________________.Won’tstayathomewon’twatchtelevisionIfyouarefreethisweekend,whatwillyoudo?IfIamfree,…sleepwatchTVplaycomputergamespracticeif条件状语从句(2)句子特点：1.if从句中用一般现在时，表示未来的一种条件，从句中可以加时间状语。2.当if表示未来的条件时，主句中用一般将来时。句型结构：主句+if条件状语从句if条件状语从句，+主句（从句后加逗号）3.时态：if一般现在时，+主句一般将来时或（can/may/must+v.)If条件句：条件句用于陈述语气，表示假设的情况可能发生，其中if是“如果”的意思。构成条件从句主句时态If＋一般现在时主语＋shall/will+动词原形例句Ifhecomes,hewilltakeustothezoo.用法：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.4.表示假设，表示将会发生和可能发生的事，或进行提醒警告。If+句子（一般现在时），+主句（主语will/may/can)+动词）Ifyoufinishyourhomework,youcangooutandplay.IfIhaveenoughmoneynextyear,Iwillgototravel.5.下列从句中的will不是将来时助动词，而是情态动词。翻译为“愿意”。Ifyouwillexcuseme,Ireallymustgotobed.如果你能原谅我的话，我真的要睡觉了。Ifyouwillwaitaminute,I’llgoandtellmymotherthatyouarehere.如果你愿意等一会的话，我去告诉我妈妈你来了。试比较下列句子：Ifyouseehimtomorrow,givehimthisbook.如果你明天去看他，给他这本书。Ifyouwillseehimtomorrow,givehimthisbook.如果你明天愿意去看他，给他这本书。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e.g.1.Ifyoudon’tgetupearly,youwillbelateforschool.你如果不早点起床，上学就会迟到。2.IfIplaygamesonit,itwillgowrong.如果我用它玩游戏，它就会坏掉。3.Ifyoufinishthehomework，youcangohome．如果你作业做完了就可以回家了。4.Ifyouwanttoloseweightyoumust/shouldeatlessbread.如果你想减肥，你必须少吃面包。5.Ifyouheaticeitturnstowater.(也可用willturn)如果把冰加热，它就会化成水。1.Ifhe____________(not,doit),I___________(do)it.2.Ifyou____(be)lateforschool,myteacher________(be)angry.arewillbe3Ifshe________(win)theprize,we_______(be)happy.winswillbe4.IfI_________(not,eat)somuch,I_________(get)thinner.5.Ifyou______(tell)them,they_____________(not,believe)you.don’teatwillgettellwon’tbelieve6I_________(stay)athome,Ifit__________(rain).7.Ifit____________(not,rain),I_________(go)out.8.we__________(play)football,Ifitis_________(sun).9.Ifshe__________(become)astar,herparents____________(not,send)heraway10.He_________(watch)TV,ifhe______(be)free.willstayrainsdoesn’trainwillgowillplaysunnybecomeswon’tsendwillwatchisdoesn’tdowilldo()5.─Mikewantstoknowif____apicnictomorrow.─Yes.Butifit_______,we'llvisitthemuseuminstead.A.youhave/willrainB.youwillhave/willrainC.youwillhave/rainsD.willyouhave/rains()6.Ireallydon'tknowifshe_______itwhenshe________.A.finds/arrivesB.finds/willarriveC.willfind/willarriveD.willfind/arrives（）4.Thevolleyballmatchwillbeputoff(推迟）ifit______.A.willrainB.rainsC.rainedD.israining（）1.Becareful,ifyou______wanttomakemistakes.A.won’tB.don’tC.didn’tD.not（）2.Workhardifyou______togetagoodmark.A.wantedB.wantingC.wantD.willwant（）3.--Iwanttoknowifyou______tothepartytomorrow.--IwillifI_____free.A.willcome;amB.come;amC.willcome;willbeD.come;willbeexercisesBCABCD---I’malwaystiredinthemorning.---Ifyougotobedearly,youwon’tbetiredinthemorning.Givingsuggestions:---IgetthirstywhenIrun.---Ifyoutakesomewaterwithyou,youwon’tgetthirstywhenyourun.Iworrysomuchaboutmyschoolwork.---Ifyo