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1、八年级下册第八单元Unit 8 Have you read Treasure Island yet?辨析现在完成时和一般过去时的区别 目录CONTENTS2导入知识讲解课堂练习小节past now The girl opened the door.The door is open now.The girl has opened the door.导入 表示过去发生的动作对现在造成了影响和结果past now futureShe wrote a word A on the blackboard.There is a word A on the blackboard now.She has wri
2、tten a word A on the blackboard.导入表示过去发生的动作对现在造成了影响和结果 现在完成时含义现在完成时含义 表示过去发生并且已经完成的动作对现在造表示过去发生并且已经完成的动作对现在造成的影响和结果成的影响和结果past now Yesterday,we cleaned the classroom.Now,the classroom is clean.强调强调过去发生的动作过去发生的动作对对现在产生的现在产生的结果或影响结果或影响 We have cleaned the classroom.知识讲解 现在完成时结构现在完成时结构 知识讲解肯定句：主语+have/
3、has+动词的过去分词(第三人称单数用has，其他人称用have）I have had noodles.He has had noodles.否定句：主语+have/has+not+动词过去分词 I have not/havent had noodles.He has not/hasnt had noodles.现在完成时结构现在完成时结构 知识讲解一般疑问句：Have/Has+主语+动词的过去分词 Have you had noodles?Has he had noodles?肯定答语：Yes,主语+have/has Yes,I have.Yes,He has.否定答语：No,主语+have
4、nt/hasnt No,I havent.No,He hasnt.现在完成时和一般过去时的区别现在完成时和一般过去时的区别 难点突破now She has written a word A on the blackboard.She wrote a word A on the blackboard just now.难点突破难点突破past now now past He has had lunch.He is full now.He had lunch just now.?一般一般过过去去时时强强调调的是的是过过去去发发生的生的动动作。作。与现与现在在没没有有关关系，后面常系，后面常有表有表
5、过过去的去的时间状语时间状语,如如yesterday,lastweek/year/.yesterday,lastweek/year/.，等等。，等等。现现在完成在完成时时表示表示过过去去发发生的生的动动作作对现对现在造成的影在造成的影响响，强，强调调的是的是现现在的情在的情况况。alreadyalready，yet yet，nevernever，everever，justjust，beforebefore，so far,these daysso far,these days等等 课堂练习11 She has already had breakfast.She had breakfast yet
6、.(变否定句）she had breakfast yet?(变一般疑问句）Yes，she .（肯定回答）No,she .(否定回答）hasntHashasnthas12难点巩固I.They to Hong Kong last year.(go)2.He the classroom already.(clean)3.She reading the book yet.(not finish)4.I a new computer last week.(buy)5.Tom the film before.(see)wenthas cleanedhasnt finishedboughthas seen【
7、课堂小结】【课堂小结】小结过去时过去时现在完成时现在完成时How manyHow manyHow manyHow many与与与与How muchHow muchHow muchHow muchA:Can I help you？B:Yes，please!I want some apples.A:How many apples do you want?B:I want three apples.And I want some beef,too.A:How much beef do you want?B:A kilo,please.These oranges are good.How much d
8、o they weigh?A:A kilo.B:I will take them.How much are they?A:Ninety-five yuan.B:Heres the money.A:Thanks.情景导入聚 焦Focushow many 和和 how much1 1情境创设How many apples do you want?How much meat do you want?How many oranges can you see?How much milk do you drink every day?how many 和 how much 都可以对数量进行提问，表示“多少
9、”How many+可数名词复数 +一般疑问句How much+不可数名词 +一般疑问句-How much is the T-shirt?-It s fifty yuan.-How much is the beef?-It s seventy yuan a kilo.-How much are the shoes?-They are sixty yuan.2 2情境创设how much可以用来询问物品的价格，表示“多少钱”How much is +单数名词/不可数名词How much are+可数名词复数How much does the dog weigh?-How much is thre
10、e plus two?-Its five.How much do you know about Beijing?3 3情境创设3+2=?how much可以用来询问体重、数字的计算结果和对事物的了解或喜爱程度等用how many 和 how much 填空。(1)_ apples would you like?(2)_ rice is there in the bowl?(3)_do you know about America?(4)_ does the elephant weigh?(5)_ is the schoolbag?Its one hundred yuan.巩固练习How manyHow muchHow muchHow muchHow muchhow many 和 how much 都表示“多少”课堂小结How much价格价格数字数字计算算结果果对事物事物的喜的喜爱程度程度体重体重BYE-BYE