EnjoythesongIfyouarehappy IfIamhappy,Iwillsmile.Iftheyarehappy,theywillsinganddance. SectionAUnit5Ifyougototheparty,you’llhaveagreattime! 一条牛仔裤apairofjeansletsbin让某人进入（来）是动副结构代词是宾语时必须放在中间。其反义词为letsbout让某人出去别让那个男孩儿进来！Don’tlettheboyin!让他出去！Lethimout.organizethepartygames组织聚会游戏 Whatwillhappentomorrow?Itwillbesunnytomorrow.Theywillplayfootballtomorrow.用if合并成一句Theywillplayfootballifitissunnytomorrow.Ifitissunnytomorrow,theywillplayfootball.ifisWillbe 如果明天下雨，我将弹钢琴。Ifitisrainytomorrow,Iwillplaythepiano.berainyplaythepianoLookatthepictureandmakeupsentencesusing“if”. Exercisehealthy如果我锻炼，我将健康。IfIexercise,Iwillbehealthy. Whendoyougetuponweekends?(9:00)Igetupat9:00onweekends.Whatwillhappenifyougetupat9:00thismorning?(IfI…,Iwill…)IfIgetupat9:00,Iwillbelate.IwillbelateifIgetupat9:00. Whatwillhappenifyouarelateforschool?(IfI…,myteacherwill……)IfIamlateforschool,myteacherwillbeangrywithme.MyteacherwillbeangrywithmeifIamlateforschool.teacher Whatwillhappenifyourteacherisangrywithyou?(Ifmyteacher…,Iwill…)Ifmyteacherisangrywithme,Iwillbesad.Iwillbesadifmyteacherisangrywithme. Whatwillhappenifyougetupat9:00thismorning?IfIgetupat9:00,Iwillbelate.IfIamlate,myteacherwillbeangrywithme.Ifmyteacherisangrywithme,Iwillbesad.IfIamsad,Iwilltalkwithmybestfriend. if“如果”，引导的条件状语从句1时态－－主将从现主句一般将来时，从句一般现在时2条件状语从句通常由连词if引导，意为“如果、假如”，主句不能用begoingto表示将来，而应该用will,shall(主语为第一人称）1.Ifshe(come)heretomorrow,I(ask)hertocallyou.2.Ifwe(work)harder,we(get)bettergrades.comeswillaskworkwillget Whatwillhappenifyousleepinclass?IfI_____inclass,I________(get)badgrades.IwillgetbadgradesifIsleepinclass.sleepwillget温馨提示:if引导的条件状语从句既可放在主句前,也可放在主句后.从句置于主句前时,须有逗号与主句隔开,反之则不用逗号. IfI____computergamesonweekdays,I_____(be)verytiredinclass.I’llbeverytiredinclassifIplaycomputergamesonweekdays.Whatwillhappenifyouplaycomputergamesonweekdays?playwillbe IfI_____hard,I_____(get)goodgrades.IwillgetgoodgradesifIstudyhard.Whatwillhappenifyoustudyhard?studywillget (1)ifwillshe,callme,I,tellheraboutitIfshecallsme,Iwilltellheraboutit.(2)he,havefreetime,gotoShanghai,(3)I,havemuchmoney,buyabighouseIfhehasfreetime,hewillgotoShanghai.IfIhavemuchmoney,Iwillbuyabighouse.Makeupsentencesusing“if”. A:IthinkIamgoingtotheparty.B:Ifyoudo,youwillhaveagreattime.=Ifyougototheparty,youwillhaveagreattime. 1aLookatthepictures.Thenmatchthestatementswithresponses.1.IthinkI’mgoingtogotothepartywithKarenandAnn.2.IthinkI’mgoingtowearjeanstotheparty.3.IthinkI’mgoingtotakethebustotheparty.4.IthinkI’mgoingtostayathome.a.Ifyoudo,theteacherswon’tletyouin.b.Ifyoudo,you’llbelate.c.Ifyoudo,you’llbesorry.d.Ifyoudo,you’llhaveagreattime.牛仔裤1bListen.Wereyouranswerstoactivity1acorrect? A:Whatareyougoingtodo?BIthinkI’mgoingtostayathome.A:Ifyoudo,you’llbesorry.Pairwork1c A:Whatareyougoingtodotomorrow?B:IthinkI’mgoingto….A:Ifyoudo,youwill….stayathomeboredworkuntilnighttiredPairworkhangoutwithfriends/haveagoodtime 2aListenandnumberthesephrasesintheorderyouhearthem.（听对话，按听到词组的顺序编号。）a.studyfortheirtestsb.helpmeorganizeitc.tooearlyd.makesomefoode.Saturdayafternoonf.playpartygames123456AndreaMark 2b:listenagainandanswerthequestions.Whatwillhappeniftheyhavethepartytoday?Whatwillhappeniftheyhavethepartytomorrow?Whatwillhappeniftheywatchavideoattheparty?WhatisMarkgoingtoorganize?WhatisAndreagoingtodo?Markisgoingtoorganizethepartygames.Somestudentswillbebored.Studentswillleaveearlytostudyfortheirtest.Halftheclasswon’tcome.Andreaisgoingtomakesomefood.MarkAndrea Halftheclasswon’tcome.一半的同学将不会来。half的用法：1halfadj.一半的，一般要放在冠词、物主代词或指示代词之前。半小时_______“half+名词”作主语时，谓语动词的单、复数形式由所接名词的单、复数形式来决定，名词是中心词。Halftheapples_____bad.这些苹果中有一半是坏的。Halftheapple_____bad.这个苹果一半是坏的2Half还可作名词，意为“半，一半”其复数形式为_____.“……个半……”可表达为“数词+名词+andahalf”或“数词+andahalf+名词（复数）”。例如：三个半小时threehoursandahalfthreeandahalfhourshalfanhourareishalves 2cPairworkLookatthechartandroleplaytheconversationbetweenAndreaandherfriend.A:OK,whenisagoodtimetohavetheparty?B:Let’shaveittoday.A:Ifwehaveittoday,halftheclasswon’tcome. Whenisagoodtimetohavetheparty?举行聚会的最佳时间是在什么时候？tohavetheparty是动词不定式作后置定语，修饰名词time不定式作定语时，常放在被修饰的词语之后①.Wouldyoulikesomething______?A.drinkB.drinkingC.todrinkD.drinks②.Ihavealotofhomework______.A.doB.doingC.didD.todoCD ExercisesFillintheblankswiththewordsgiven.ThestudentswillgototheGreatWallifit___________(notrain)tomorrow.Ifhe___________(notdo)hishomework,he’llbelate.Ifshelikesit,she_____________(read)itsoon.Ifyouplaycomputergamesonweekdays,you_________(be)tired.IfyouwatchTVtonight,you__________(notstudy)forthetest.doesn’traindoesn’tdowillreadwillbewon’tstudy Idon’tknowifmybrother______(come)tomorrow.Ifhe_______(come),I’llbehappy.注意宾语从句中的if与条件状语从句if的区别。宾语从句中的if“是否”相当于whether，宾语从句通常位于主句之后。引导宾语从句，时态需根据语境确定。　　我不知道明天是否会下雨。Idon'tknowifit_______(rain)tomorrow.willcomecomeswillrain 用所给词的正确形式填空。1.Ifyou______(be)late,theteacherwillbeangry.2.Wedon’tknowifit__________tomorrow(snow).3.He______________(become)asoccerplayerifheworkshard.4.You_________(be)famousifyousingwell.arewillsnowwillbecomewillbe5Halfofthesebananas_____________(be)bad.6Halfoftheboys__________(like)basketball.arelike MakeasurveyAskthreestudents:Whatwillyoudoifwehavenolessonstomorrow？Thenmakeareportlikethis:Ifwehavenolessonstomorrow,LiYanwillgotothemovies,...NameThingstodoLiYanShewillgotothemoviesifwehavenolessonstomorrow. DearJenny,Thanksforinviting（邀请）metotheparty.Ofcoursepresent,youarehappy.Ihopeitwon’trainthatday.②Becauseifitwon’train,mylittlesonwillcome,too.③Ifhecomes,youaren’tdisappointed,heisreallyfunny.④OK,seeyouontheparty.Yours,willbedoesn’tgivewon’tbeI’llgototheparty.AndIthinkifIwillgiveyoua①Pleasehelpmecorrectthesentences.RoseCorrectandWrite（礼物） Summary条件状语从句1.常用关联词if（如果）进行引导。2.if引导的状语从句可放在主句前，也可在主句后3.主句谓语动词是一般将来时，从句时态通常用一般现在时。