if引导的条件状语从句专题教育课件市公开课一等奖百校联赛获奖课件.pptx

If 引导条件状语从句引导条件状语从句 GRAMMAR：华陀中学华陀中学:.1.21第1页位置：从句可放在主句之前或之后，不过放在主句之从句可放在主句之前或之后，不过放在主句之前须有逗号隔开前须有逗号隔开eg:假如我有足够钱，我就去周游世界假如我有足够钱，我就去周游世界定义：定义：if“假如假如,假如假如”它引导句子表示某事发生所它引导句子表示某事发生所需条件，即需条件，即“在在条件下，某事才能发生条件下，某事才能发生”，在句子，在句子中充当状语，所以称之为条件状语从句。（中充当状语，所以称之为条件状语从句。（If引导引导条件状语从句表示假如有从句动作发生，就会有主条件状语从句表示假如有从句动作发生，就会有主句动作发生句动作发生）If I have enough money,I will travel around the world=I will travel around the world if I have enough moneyIfitrainstomorrow,Iwillstayathome.一、什么是条件状语从句？一、什么是条件状语从句？第2页IfIgetuplate,Iwillbelateforschool.IfIdontfinishmyhomework,Iwontgotobed.Ifyoujointheband(乐队乐队),youwillbefamous.主从句时态？主从句时态？第3页无忧PPT整理发布If条件句：条件句用于陈说语气，表示未来可能性，能力，未来可能性，能力，允诺，允诺，命令，要求，请求，提议时，命令，要求，请求，提议时，假设情况可能发生，其中 if 是“假如，假如”意思。主句主句普通未来时普通未来时，从句用，从句用普通现在时普通现在时。构成条件从句主句时态If普通现在时主语shall/will+动词原形例句If he comes,he will take us to the zoo.利用利用“主将从现主将从现”标准。标准。第4页无忧PPT整理发布使用方法：1.假如主句是普通未来时，从句则用普通现在时。假如主句是普通未来时，从句则用普通现在时。If it rains（从句），I will stay at home.Ill go with you if you dont want to go alone（从句）.2.假如主句含有假如主句含有must,may,can等情态动词，从句也要用等情态动词，从句也要用普通现在时。普通现在时。If you drive too fast,you may have an accident.You must stop if the traffic is red.Ifyoufinishthehomework，youcangohome假如你作业做完了就能够回家了。假如你作业做完了就能够回家了。Ifyouwanttoloseweightyoumust/shouldeatlessbread.假如你想减肥，你必须少吃面包。假如你想减肥，你必须少吃面包。第5页无忧PPT整理发布3.假如主句是祈使句，从句一样要用普假如主句是祈使句，从句一样要用普通现在时。通现在时。Dont go and play football if you dont finish your homework.Please call me if he comes next Sunday.第6页无忧PPT整理发布练一练练一练：1。假如她早点儿起床，就有时间在家里吃早餐 If she_ _a little earlier,shell have time to eat breakfast at home.2。假如你参加聚会，你将会过得很开心。If you_ the party,you_ _ a great time.3。假如明天下雨，我们将不去野餐If it _tomorrow,we _ _ for a picnic.4。假如你经常听英文歌，你将会喜欢英语If you often _ _English songs,you_ _English.getsupjoinwillhaverainswontgolistentowilllike第7页无忧PPT整理发布1.Ifhe_(not,do)it,I_(do)it.2.Ifyou_(be)lateforschool,myteacher_(be)angry.arewillbe3.Ifshe_(win)theprize,we_(be)happy.winswillbe4.IfI_(not,eat)somuch,I_(get)thinner.5.Ifyou_(tell)them,they_(not,believe)you.donteatwillgettellwontbelievedoesntdowilldo用所给单词正确形式填空：用所给单词正确形式填空：第8页无忧PPT整理发布6I_(stay)athomeifit_(rain).7.Ifit_(not,rain),I_(go)out.8.we_(play)footballifitis_(sun).9.Ifshe_(become)astar,herparents_(be)proudofher.10.He_(watch)TVifhe_(be)free.willstayrainsdoesntrainwillgowillplaysunnybecomeswillbewillwatchis第9页无忧PPT整理发布2.If 从句从句（普通现在时），（普通现在时），主句主句（普通现在时普通现在时）表示科学常识、事实、表示科学常识、事实、经常性动作或倾向经常性动作或倾向 自自动会发生事动会发生事 1.If water 1.If water is heatedis heated,it,it turnsturns to steam.to steam.2.If people 2.If people dont getdont get enough sleep,their enough sleep,their thinking ability thinking ability is reducedis reduced.3.If I 3.If I needneed a haircut,I a haircut,I usuallyusually gogo to the to the barbers near where I live.barbers near where I live.4.People 4.People often often dont godont go out on Sundays if it out on Sundays if it rainsrains.第10页无忧PPT整理发布1.as(so)long as.“1.as(so)long as.“只要只要，就就 ”表示表示 一个前提条件一个前提条件Youll succeed Youll succeed as(so)long as(if only)as(so)long as(if only)you try hard.you try hard.只要你努力，你就会成功。只要你努力，你就会成功。拓展：拓展：那么，除了那么，除了if之外，是否之外，是否还有其它连词能够引导条件状语还有其它连词能够引导条件状语从句呢从句呢 第11页无忧PPT整理发布2unless 除非；若不；假如不除非；若不；假如不；除非在；除非在时候时候 1.You will fail to arrive there in time 1.You will fail to arrive there in time unless unless you you start earlierstart earlier假如你不早点动身，你就不能及时赶到那儿。假如你不早点动身，你就不能及时赶到那儿。2.2.UnlessUnless bad weather stops me bad weather stops me，I go for a I go for a walk every morningwalk every morning除非天气不好，我天天早晨都要去散步。除非天气不好，我天天早晨都要去散步。3.I wont loan you 3.I wont loan you unlessunless you are in extreme you are in extreme need of moneyneed of money若不是你急需用钱，我不会借钱给你。若不是你急需用钱，我不会借钱给你。第12页无忧PPT整理发布中考真题：（安徽）1.If the rain _(stop)tonight,we will go to the cinema.（黑龙江）2.Ill buy a computer if I _(have)enoug money.（内蒙古）3.You _(not get)nervous if you _(do)enough exercise.（浙江）4.If she _(be)kind to me,I _(not argue)with her.stopshavewontgetdoiswontargue第13页分析试题特点及做题思绪：分析试题特点及做题思绪：1.考连词考连词-做题思绪：做题思绪：分析句子分析句子-判断关系判断关系-选择正确连词：选择正确连词：1.Youwontgetnervous_youdoenoughexercise.A.if,B,unlessC,whether2._youhurryup,youwillmisstheearlybus.A.if,B,unlessC,whether分析试题特点及做题思绪：分析试题特点及做题思绪：第14页无忧PPT整理发布2.Youmay_(pass)theexamifyou_(study)hard.2.考时态考时态-做题思绪：做题思绪：认字认字-判断语境提供时态特点判断语境提供时态特点-选择正确时态选择正确时态A.rain,stayB.rains,stayC.rains,willstayD.rain,willstay1.IfIt_(rain)tomorrow,I_(stay)athome.A.pass,studyB.willpass,studyC.pass,willstudyD.passes,study第15页无忧PPT整理发布IfImill,_.IwillseeadoctorLookandsayIfImlate,_.Iwillsaysorry条件状语从句在日常生中应用：条件状语从句在日常生中应用：第16页无忧PPT整理发布IfImhungry,Iwill_.IfIm tired,Iwill_.Lookandsayeatsomefoodhavearest第17页无忧PPT整理发布Ifitrainstomorrow,I_.willwatchTVathomeIfit_tomorrow,_.Illplaybasketballdoesntrain第18页无忧PPT整理发布if条件句不普通条件句不普通,几个关键点记心间几个关键点记心间;条件句条件句,放在前放在前,逗号要放句中间。逗号要放句中间。条件句表可能，条件句表可能，主将从现不普通；主将从现不普通；条件句表事实，条件句表事实，主句惯用现在时。主句惯用现在时。Summary（小结）第19页无忧PPT整理发布Ifwestudyharder,wewilldowellintheexams,Tryourbesttostudyharder.第20页无忧PPT整理发布Homework.Finishtheexercisesintheworkbook.第21页