if条件状语省公共课一等奖全国赛课获奖课件.pptx

If 引导条件引导条件状语从句状语从句 第1页一一、定义、定义二二、详细使用方法、详细使用方法三三、练习、练习四四、拓展、拓展五、总结五、总结目录：目录：第2页定义：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引导条件状语从句表示假如有从句动作发生，引导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就会有主句动作发生）一、什么是条件状语从句？一、什么是条件状语从句？第3页位置位置：从句可放在主句之前或之后，不过放在主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句之前须有逗号隔开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If I have enough money,I will travel around the world=I will travel around the world if I have enough moneyIfitrainstomorrow,Iwillstayathome.从句从句主句主句第4页二、条件二、条件状语状语从句使用方法从句使用方法IfIgetuplate,Iwillbelateforschool.IfIdontfinishmyhomework,Iwontgotobed.Ifyoujointheband(乐队乐队),youwillbefamous.Letslookatsomesentencesfirst第5页使用方法使用方法1：If条件句条件句：条件句用于陈说语气，表示未来可能性，能力，条件句用于陈说语气，表示未来可能性，能力，允诺，命令，要求，请求，提议时，假设情况可能发生，其允诺，命令，要求，请求，提议时，假设情况可能发生，其中中 if是是“假如，假如假如，假如”意思。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。“主将从现主将从现”标准。标准。构构成成条件从句条件从句主句主句时时态态If普通现在时主语主语shall/will+动词原形动词原形例例句句Ifhecomes,hewilltakeustothezoo.第6页使用方法2：假如假如主句含有主句含有must,may,can等情态动词，从句也要用等情态动词，从句也要用普通普通现在时现在时。Youmuststopifthetrafficisred.假如是红灯，你必需停下来。假如是红灯，你必需停下来。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。Ifyouwanttoloseweight,youmust/shouldeatlessbread.假如假如你想减肥，你必须少吃面包。你想减肥，你必须少吃面包。第7页使用方法使用方法3：假如主句是祈使句，从句一样要用普通现在时。假如主句是祈使句，从句一样要用普通现在时。Dontgoandplayfootballifyoudontfinishyourhomework.假如没有完成家庭作业，就不要去踢足球。假如没有完成家庭作业，就不要去踢足球。PleasecallmeifhecomesnextSunday.假如他下周日来话，请打电话给我。假如他下周日来话，请打电话给我。第8页使用方法使用方法4：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 自动会发生自动会发生事事If从句从句 （普通现在时），主句（普通现在时），主句 （普通现在时普通现在时 ）。）。1.If water 1.If water is heatedis heated,it,it turnsturns to steam.to steam.假如水加热，就会蒸发。假如水加热，就会蒸发。2.If people 2.If people dont getdont get enough sleep,their thinking ability enough sleep,their thinking ability is is reducedreduced.假如人们睡眠不足，他们思维能力就会下降。假如人们睡眠不足，他们思维能力就会下降。3.If I 3.If I needneed a haircut,I a haircut,I usuallyusually gogo to the barbers near my to the barbers near my house.house.假如我要剪头发，我通常是去附近那一家剪发店。假如我要剪头发，我通常是去附近那一家剪发店。4.People 4.People often often dont godont go out on Sundays if it out on Sundays if it rainsrains.假如周日下雨话，人们普通不出门。假如周日下雨话，人们普通不出门。第9页三、练一练三、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10页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11页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12页四、拓展四、拓展除了除了if之外，是否还有其它连词能够引之外，是否还有其它连词能够引导条件状语从句呢？导条件状语从句呢？最常见还有：最常见还有：so/as long as只要只要 unless除非，若不除非，若不第13页1.as(so)long as.“1.as(so)long as.“只要只要，就就 ”表示表示 一个前提一个前提条件条件Youll succeed Youll succeed Youll succeed Youll succeed as(so)long as(if only)as(so)long as(if only)as(so)long as(if only)as(so)long as(if only)you try hard.you try hard.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。只要你努力，你就会成功。只要你努力，你就会成功。As long as you are happy,it doesnt matter what you do.As long as you are happy,it doesnt matter what you do.As long as you are happy,it doesnt matter what you do.As long as you are happy,it doesnt matter what you do.只要你高兴，你做什么都没相关系只要你高兴，你做什么都没相关系只要你高兴，你做什么都没相关系只要你高兴，你做什么都没相关系You may borrow my books as long as you keep it clean.You may borrow my books as long as you keep it clean.You may borrow my books as long as you keep it clean.You may borrow my books as long as you keep it clean.只要你保持书清洁，你就能够借我书。只要你保持书清洁，你就能够借我书。只要你保持书清洁，你就能够借我书。只要你保持书清洁，你就能够借我书。第14页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 You will fail to arrive there in time You will fail to arrive there in time unless unless you start earlieryou start 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。UnlessUnless bad weather stops me bad weather stops me，I go for a walk every morningI go for a walk 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。I wont loan you I wont loan you unlessunless you are in extreme need of money you are in extreme need 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15页中考真题：（安徽）1.Iftherain_(stop)tonight,wewillgotothecinema.（黑龙江）2.IllbuyacomputerifI_(have)enougmoney.（内蒙古）3.You_(notget)nervousifyou_(do)enoughexercise.（浙江）4.Ifshe_(be)kindtome,I_(notargue)withher.stopshavewontgetdoiswontargue第16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17页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18页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19页IfImhungry,Iwill_.IfIm tired,Iwill_.Lookandsayeatsomefoodhavearest第20页Ifitrainstomorrow,I_.willwatchTVathomeIfit_tomorrow,_.Illplaybasketballdoesntrain第21页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。五、Summary（小结）Ifwestudyharder,wewilldowellintheexams.Tryourbesttostudyharder！第22页Homework.Finishtheexercisesintheworkbook.第23页