AdverbialClauseofCondition条件状语从句条件状语从句If you are happyIf you are happy and you know it clap your hands If you are happy and you know it clap your handsIf you are happy and you know it never be afraid to show itIf you are happy and you know it clap your handsIf you are happy and you know it stomp your feet.If you are happy and you know it stomp your feet.If you are happy and you know it never be afraid to show itIf you are happy and you know it stomp your feetIf you are happy and you know it wink your eyeIf you are happy and you know it wink your eyeIf you are happy and you know it never be afraid to show itIf you are happy and you know it wink your eyeIf you are happy, what will you do? If I am happy, I will smile.If you become sad, what will you do?If I become sad, I will cry.She is doing her homework.If you are hard-working, you will get good grades.She gets good grades.If you play computer games on weekdays ,youll be very tired in classyour parents will be sad.you wont get good grades.your eyes will be poorShe will be late.If she _ to school, she _ _late. She is going to walk to school.walkswillbe位置：从句可放在主句之前或之后，但是放在主句之前须有从句可放在主句之前或之后，但是放在主句之前须有逗号隔开逗号隔开eg:如果我有足够的钱，我就去环游世界If 引导条件状语从句 定义：定义：if “如果如果, 假如假如” 它引导的句子表示某事发生所需的它引导的句子表示某事发生所需的条件，即条件，即“在在条件下，某事才能发生条件下，某事才能发生”，在句子中充当状语，在句子中充当状语，因此称之为条件状语从句。（因此称之为条件状语从句。（ If引导的条件状语从句表示假引导的条件状语从句表示假如有从句的动作发生，就会有主句动作的发生如有从句的动作发生，就会有主句动作的发生 ）If I have enough money, I will travel around the world =I will travel around the world if I have enough moneyIf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。主句主句一般将来时一般将来时，从句用一般现在时。，从句用一般现在时。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If he comes,he will take us to the zoo.用法：1.如果主句是一般将来时，从句则用一般现在时。如果主句是一般将来时，从句则用一般现在时。 If it rains（从句）， I will stay at home. Ill go with you if you dont want to go alone（从句）. 2.如果主句含有如果主句含有must,may,can等情态动词，从句也要用等情态动词，从句也要用一般现在时。一般现在时。If you drive too fast, you may have an accident. You must stop if the traffic is red.Ifyoufinishthehomework，youcangohome如果你作业做完了就可以回家了。如果你作业做完了就可以回家了。Ifyouwanttoloseweightyoumust/shouldeatlessbread.如果你想减肥，你必须少吃面包。如果你想减肥，你必须少吃面包。3.如果主句是祈使句，从句同样要用一如果主句是祈使句，从句同样要用一般现在时。般现在时。Dontgoandplayfootballifyoudontfinishyourhomework.PleasecallmeifhecomesnextSunday.1.如果主句是一般将来时，从句则用一般现在时。如果主句是一般将来时，从句则用一般现在时。 If it rains（从句），（从句）， I will stay at home. Ill go with you if you dont want to go alone（从句）（从句）. 2.如果主句含有如果主句含有must,may,can等情态动词，从句也要用等情态动词，从句也要用一般现在时。一般现在时。If you drive too fast, you may have an accident. You must stop if the traffic is red.3.如果主句是祈使句，从句同样要用一般现在时。如果主句是祈使句，从句同样要用一般现在时。 Dont go and play football if you dont finish your homework. Please call me if he comes next Sunday.if条件状语从句结构及时态条件状语从句结构及时态Revision练一练：1。如果她早点儿起床，就有时间在家里吃早餐 If she_ _a little earlier, shell have time to eat breakfast at home.2。如果你参加聚会，你将会过得很开心。If you_ the party ,you_ _ a great time.3。如果明天下雨，我们将不去野餐If it _tomorrow, we _ _ for a picnic.4。如果你经常听英文歌，你将会喜欢英语If you often _ _English songs, you_ _English.getsupjoinwillhaverainswontgolistentowilllike1.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.donteatwillgettellwontbelieve6I_(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.willstayrainsdoesntrainwillgowillplaysunnybecomeswontsendwillwatchisdoesntdowilldo2.Youmay_(pass)theexamifyou_(study)hard.rainswillstaypassstudy3.Ifyouwanttorecord,_(press)theredlight.press1.IfIt_(rain)tomorrow,I_(stay)athome.Fill in the blankets with the proper form1.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.goeswillhavestopshavewontgetdocomeswillcomewillgiveIf Im ill,_. IwillseeadoctorLookandsayIf Im late,_.IwillsaysorryIf Im hungry,I will_. If Im tired, I will_. LookandsayeatsomefoodhavearestIf it rains tomorrow,I_.willwatchTVathomeIf it _ tomorrow,_.IllplaybasketballdoesntrainI wont_.playbasketballIfyouarefreethisweekend,whatwillyoudo?IfIamfree,sleepwatchTVplaycomputergamespracticeIfyouwanttogetgoodmarks,dowhat?Dontdowhat?Ifyouwanttogetgoodmarks,_.Ifyouwanttogetgoodmarks,dont_.studyhardlistentoteacherscarefully.dohomeworkbyyourself.copyyourhomework.talkintheclasscheatintheexamsIfyouhaveenoughpocketmoney,whatwillyoubuy?IfIhaveenoughpocketmoney,I_.IfyouinviteforeignerstoChina,wherewillyougo?Iwillgoto_,ifIinviteforeignerstoChina.MountTaiWestlakeHainanGameRulesTopic 1: If I am happy, A: If I am happy, I will go shopping.B: If I go shopping, I can buy some clothes.C: If I can buy some clothes, I will spend much money.D: If I spend much money, E: .【比一比比一比】：一分钟一分钟内，根据所给话题，看同学们能内，根据所给话题，看同学们能接出多少接出多少条件状语从句条件状语从句。【注意注意】在句子接龙时，主句与从句变换时，要注意在句子接龙时，主句与从句变换时，要注意从句时态的变换，从句用一般现在时。从句时态的变换，从句用一般现在时。If 条件句的替代形式：条件句的替代形式： （1）祈使句祈使句 + and/or + 陈述句陈述句（谓语动词通常用将来时态）。其（谓语动词通常用将来时态）。其中，中，and表示句意顺承；表示句意顺承；or表示转表示转折，意为折，意为“否则否则”。e.g. If you work hard, youll pass the exam easily. = Work hard, and youll pass the exam easily.If you dont work hard, youll fall behind others. = Work hard, or youll fall behind others.（2）用介词）用介词with, without的替代形的替代形式：式： e.g. If there is no water, the fish may die. = Fish may die without water. If you help me, Ill finish my task on time. =With your help, Ill finish my task on time. Activity 1 Rewrite the sentences with if:Listeninclass,oryouwontunderstandwhattodo.Ifyoudontlisteninclass,youwontunderstandwhattodo.1) Eat breakfast, or youll get hungry at school.2) Hurry up! Well be late!Ifyoudonteatbreakfast,youllgethungryatschool.Ifyoudonthurryup,wellbelate.Activity2.Completethesentences I want to get high scores. If _(work hard/ do well)youworkhard,youwilldowell.1.-howcanIremembermyfriendsbirthdays?-If_(keepanoteinyourdiary/notforget).2.-Itslate,butIdontwanttogotosleep.-If_(notgetenoughsleep/feeltiredatschool).you keep a note in your diary, you wont forget.you dont get enough sleep, youll feel tired at school.If在宾语从句中翻译为在宾语从句中翻译为“是否是否”If在条件状语从句中翻译为在条件状语从句中翻译为“如果如果”IllgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.if在句中的含义不同在句中的含义不同2.if在从句中的位置不同在从句中的位置不同If引导的宾语从句放在主句之后；而引导的宾语从句放在主句之后；而if引引导的状语从句可放在主句之前也可放在主导的状语从句可放在主句之前也可放在主句之后句之后=Ifitdoesntrain,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesntrain.Idontknowifthetrainhasarrived.If引导的条件状语从句放于句首时多用逗号隔开；引导的条件状语从句放于句首时多用逗号隔开；而而if引导的宾语从句则不能。引导的宾语从句则不能。3.时态要求上有区别时态要求上有区别If引导条件状语从句的时态为一般现在时引导条件状语从句的时态为一般现在时记住记住“主将从现主将从现”1.Iwanttoknowifthereasportsmeetingnextmonth.doesnt rainwill be2.Ifitdoesntrain,wellgooutIf引导的宾语从句的时态由主句及本身时引导的宾语从句的时态由主句及本身时态决定；态决定；1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Icantguessifshewillbeangry.4.Ifwehelpeachother,wewillgetgoodresults.1 If I _(not understand）, I will ask my teacher for help .2If I _(copy ) your homework , I will cheat myself .3 If she _(not get ) up early , shell miss the early bus .4 If your mother_ (buy) the book for you , it will be good for your study. dont understand copydoesnt get buys5. If you _(not work ) hard , you _(not pass) the exam.6. If your brother _(break) the window , he will feel very sorry for that .7. If the computer (not work), mend it please .dont workwont passbreaksdoesnt work8. If she _(not be) interested in math, she will find it very boring .9. If you _(get ) high scores, your parents will be proud of you .10. If you _(be) happy , we will be happy .isnt getare .Iwanttoknowifhe_(come)tomorrow,ifhe_(come),I_(give)themessagetohim.comeswillcomewillgiveif的用法的用法2.引导条件状语从句：引导条件状语从句：译为译为“如果，假如如果，假如”(1)if从句从句+祈使句祈使句(2)if从句从句+主句（一般将来时）主句（一般将来时）(3)if从句从句+主句（含有情态动词）主句（含有情态动词）1.引导宾语从句引导宾语从句：译为：译为“是否是否”，表示不确定的概，表示不确定的概念。念。Idontknowifyourfathercancometogether.Canyoutellmeifmissyourparents?HomeworkWriting：任选一个话题，写：任选一个话题，写一篇小文章。一篇小文章。要求：不少于字数要求：不少于字数60词；词；尽可能多地用条件状语尽可能多地用条件状语从句来表达。从句来表达。If you are happyIf you are happy and you know it clap your hands If you are happy and you know it clap your handsIf you are happy and you know it never be afraid to show itIf you are happy and you know it clap your handsIf you are happy and you know it stomp your feet.If you are happy and you know it stomp your feet.If you are happy and you know it never be afraid to show itIf you are happy and you know it stomp your feetIf you are happy and you know it wink your eyeIf you are happy and you know it wink your eyeIf you are happy and you know it never be afraid to show itIf you are happy and you know it wink your eye1.Ifyou_totheparty,youllhaveagreattime.A.willgoB.wentC.goD.going2I_hertheanswerifshe_me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asksCD3.Whatareyougoingtodotomorrow?-Wellgotothelibrarytomorrowifit_.A.isntrainB.rainC.wontrainD.doesntrain4.Whatwillyoudoifyou_totheoldfolkshomevisit?A.goB.wentC.goingD.willgoAD5.IfIeat_food,Illbeveryfat.A.toomanyB.manytooC.toomuchD.muchtoo6.Illgivethebooktohimifhe_herenextSunday.A.willcomeB.comesC.iscomingD.came7.There_anEnglishfilminourschooltomorrow.A.isgoingtohaveB.willhaveC.isgoingtobeD.has8.Couldyoutelluswhere_？A.willthenextOlympicGamesheldB.thenextOlympicGameswillbeheldC.wouldthenextOlympicGamesbeheldD.thenextOlympicGameswouldbeheldCCBB