小壁虎借尾巴ppt课件

.,1,17.小壁虎,借,尾巴,教学目标：1、认识“壁、墙、蚊、咬、断、您、拨、甩、赶、房、傻、转”12个生字，会写“捉、条、爬、姐、您、草、房”7个字。（重点）2、正确、流利、有感情地朗读课文，读好对话。（重点）3、理解课文内容，了解小鱼、老牛、燕子尾巴的用途和壁虎尾巴可以再生的特点。（难点）,.,“叫虎不是虎，生来有四足。爱在墙角住，专吃蚊蝇虫。”(猜一动物),.,4,bh壁虎,.,认识壁虎,壁虎是一种爬行动物。它的身体扁平，四肢短，脚趾上有吸盘，可附在墙壁上迅速爬行，有长长的尾巴。壁虎是益虫，吃蚊子、蝇等小虫子。对人类有益.,.,6,17.小壁虎,借,尾巴,.,1、小壁虎为什么借尾巴？2、它向谁借尾巴了？3、借到了吗？,问题,1小壁虎在墙角捉蚊子，一条蛇咬住了他的尾巴。小壁虎一挣，挣断尾巴逃走了。2没有尾巴多难看哪！小壁虎想，向谁去借一条尾巴呢？,3小壁虎爬呀爬，爬到小河边。他看见小鱼摇着尾巴，在河里游来游去。小壁虎说：“小鱼姐姐，您把尾巴借给我行吗？”小鱼说：“不行啊，我要用尾巴拨水呢。”,4小壁虎爬呀爬，爬到大树上。他看见老牛甩着尾巴，在树下吃草。小壁虎说：“牛伯伯，您把尾巴借给我行吗？”老牛说：“不行啊，我要用尾巴赶蝇子呢。”,.,5小壁虎爬呀爬，爬到屋檐下。他看见燕子在空中摆着尾巴飞来飞去。小壁虎说：“燕子阿姨，您的尾巴借给我行吗?”燕子说：“不行啊，我飞的时候，要用尾巴掌握方向呢。”,.,（）摇着尾巴，在河里游来游去。,读一读:,（）甩着尾巴，在树下吃草。,（）摆着尾巴，在空中飞来飞去。,小鱼,老牛,燕子,.,小壁虎借不到尾巴心情如何？为什么？,小壁虎很伤心，因为他觉得没有尾巴很难看。,第一部分（第1、2自然段）：小壁虎丢掉了尾巴，决定去借一条回来。第二部分（第3-5自然段）：小壁虎分别向小鱼、老牛、燕子借尾巴，但结果都没借到。第三部分（第6、7自然段）：写小壁虎长出了一条新尾巴。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,墙壁捉蚊子咬断一条鱼爬动姐姐您好拨水甩尾巴吃草赶走房檐傻孩子转身,墙壁捉蚊子咬断一条鱼爬动姐姐您好拨水甩尾巴吃草赶走房檐傻孩子转身,qin,b,wn,yo,dun,nn,b,shui,n,fn,sh,zhun,字词学习,.,16,我是认字小能手,壁,虎,逃,借,蛇,难,蚊,新,姐,b,h,ji,wn,sh,to,nn,ji,xn,.,壁,虎,借,蚊,蛇,逃,难,姐,新,河,呀,哪,智慧树,半包围结构：上下结构：左右结构：,捉、姐、墙、蚊、咬、断、拨、傻、转,爬、房、甩、赶,条、您、草、壁,一挣（）拨（）水转（）身,zhng,b,zhun,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,捉,条,爬,姐,您,草,房,我会写,左右结构,上下结构,半包围结构,.,20,xiobhjiwiba小壁虎借尾巴ytioshxnwiba一条蛇新尾巴bshuzhngwtozunngu拨水掌握逃走难过wnzijijieshuizheyngzi蚊子姐姐甩着蝇子,我会读,.,21,小壁虎借尾巴一条蛇新尾巴拨水掌握逃走难过蚊子姐姐甩着蝇子,我会读,墙,壁,蚊,咬,断,您,拨,甩,赶,房,傻,转,小壁虎捉蚊子,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,捉,条,爬,姐,您,草,房,我会写,左右结构,上下结构,半包围结构,结构：,部首：,书写指导：,左右,爪,爪捺要舒展，巴紧靠爪的捺，在其中间偏上位置，要小巧。,p,爬,重难点字书写指导,结构：,部首：,书写指导：,半包围,户,第一笔的点从竖中线起笔。内部饱满，第六笔横伸出户字头，收笔在横中线上。,fn,房,.,26,小壁虎为什么去借尾巴？,.,小壁虎为什么要借尾巴？,.,28,没有尾巴多难看哪!小壁虎想，向谁去借一条尾巴呢？,.,29,小壁虎向谁借尾巴了？,.,小壁虎是怎样向小鱼借尾巴的呢？请你用“”划出来。,.,小壁虎是怎样向小鱼借尾巴的呢？请你用“”划出来。,小壁虎爬呀爬，爬到小河边。他看见小鱼摇着尾巴。小壁虎说：“小鱼姐姐，您把尾巴借给我行吗？”小鱼说：“不行啊，我要用尾巴拨水呢。”,.,小鱼姐姐，您把尾巴借给我行吗？,小鱼，你把尾巴借给我！,读一读，比一比,.,33,“小鱼姐姐，您把尾巴借给我行吗？”,“不行啊，我要用尾巴拨水呢。”,因为：（）要用尾巴（）。,小鱼,拨水,小壁虎为什么没有借到尾巴呢？,.,.,35,小壁虎爬呀爬，爬到大树上。他看见老牛甩着尾巴，在树下吃草。小壁虎说:“牛伯伯，您把尾巴借给我行吗?”老牛说:“”,不行啊，我要用尾巴赶蝇子,呢。,.,36,“牛伯伯，您把尾巴借给我行吗？”,“不行啊，我要用尾巴赶蝇子呢。”,因为：（）要用尾巴（）。,小壁虎为什么没有借到尾巴呢？,牛伯伯,赶蝇子,.,.,38,小壁虎爬呀爬，爬到房檐下。他看见燕子摆着尾巴，在空中飞来飞去。小壁虎说:“燕子阿姨，您把尾巴借给我行吗?”燕子说:“不行啊，我要用尾巴掌握方向呢。”,.,39,“燕子阿姨，您把尾巴借给我行吗？”,“不行啊，我要用尾巴掌握方向呢。”,因为：（）要用尾巴（）。,小壁虎为什么没有借到尾巴呢？,燕子阿姨,掌握方向,.,小壁虎爬呀爬，爬到，他看见。小壁虎说：“，您把尾巴借给我行吗？”说：“不行啊，我要用尾巴。”,我是小作家,想一想，说一说,.,.,小壁虎借不到尾巴，心里很难过。他爬呀爬，爬回家里找妈妈。小壁虎把借尾巴的事告诉了妈妈。妈妈笑着说：“傻孩子，你转过身子看看。”小壁虎转身一看，高兴得叫了起来：“我长出一条新尾巴啦！”傻孩子（shhizi）转身（zhunshn）,小壁虎借尾巴的结果是什么？,.,4.没有借到尾巴的小壁虎的心情怎么样？,5.长出新尾巴的小壁虎的心情又是怎样的？,（难过）,（高兴）,.,1.小壁虎的妈妈为什么叫它“傻孩子”？,2.小壁虎为什么又高兴起来？,3.说说小壁虎的尾巴有什么特点？,“傻孩子，你转过身子看看。”,“我长出一条新尾巴啦！”,思考:,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,小壁虎的尾巴断了，为什么可以长出新的尾巴？,壁虎的尾巴有再生功能。,拓展延伸,为什么小壁虎的尾巴可以再生呢？,壁虎的尾巴含有再生性细胞，能通过激素的刺激使尾巴的细胞活跃，再长出新的尾巴。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,你还知道哪些动物也有类似的功能吗？,蚯蚓肢体,蜥蜴尾巴,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,“爬呀爬”在文中出现了几次？说明了什么？,小壁虎爬呀爬，爬到小河边。小壁虎爬呀爬，爬到大树上。小壁虎爬呀爬，爬到房檐下。他爬呀爬，爬回家里找妈妈。,“爬呀爬”在文中出现了四次。说明了小壁虎爬的路程很远，用了很长时间。,小壁虎为什么没有借到尾巴？小壁虎没有借到尾巴是因为动物的尾巴都有各自的用途。1.小壁虎为什么要借尾巴？因为一条蛇咬住了他的尾巴，为了逃走他挣断了尾巴，他觉得没有尾巴很难看，所以要借尾巴。,2.小壁虎都向谁借尾巴？小壁虎分别向小鱼、老牛、燕子借尾巴。3.小壁虎借到尾巴了吗？小壁虎没有借到尾巴。4.小鱼、老牛、燕子、壁虎的尾巴各有什么特点？小鱼的尾巴可以用来拨水，老牛的尾巴可以赶蝇子，燕子的尾巴是用来掌握方向的，小壁虎的尾巴有再生功能。,小壁虎借尾巴,挣断尾巴,长出新尾巴（再生）,小鱼拨水老牛赶蝇子燕子掌握方向,小小尾巴作用大,借尾巴,不借,不借,不借,第一部分（第1、2自然段）：小壁虎丢掉了尾巴，决定去借一条回来。第二部分（第3-5自然段）：小壁虎分别向小鱼、老牛、燕子借尾巴，但结果都没借到。第三部分（第6、7自然段）：写小壁虎长出了一条新尾巴。,小壁虎借尾巴是一篇科普童话。它通过叙述小壁虎向小鱼、老牛、燕子借尾巴的经过，向我们介绍了鱼、牛、燕子尾巴的用途及壁虎尾巴可以再生的特点，揭示了动物尾巴都有用的道理。,.,你还知道哪些动物的尾巴有什么用处？,学了这课你增长了哪些知识？,想一想:,动物的尾巴不同，用处也不同。,鸟的尾巴能在飞行时保持平衡。狗的尾巴能表达喜怒哀乐的情感。老虎的尾巴能当战斗武器。,.,想一想：你还知道哪些动物的尾巴有什么用处吗？,.,.,孔雀的尾巴在遇到危险的时候，它会打开尾屏，暂时吓退或迷惑敌人，保护自己。,孔雀,.,1.吸引异性；2.在自然界中起到警告和恐吓捕食者。,孔雀,.,猴子把尾巴钩在树上荡秋千。,.,啄木鸟的尾巴靠在树上支撑身体，帮助捉虫。,.,马的尾巴能赶小虫。,马,.,松鼠的尾巴在跳跃时，能保持身体平衡。晚上睡觉时，把尾巴盖在身上，当被子。,松鼠,.,鲨鱼,鲨鱼的尾巴能控制游动的方向。,.,豹子的尾巴能在快速奔跑中保持身体平衡。,豹子,鹿的尾巴又小又短，然而它却是重要的报警器。当危险接近鹿群时，首先发现敌害的鹿会竖起尾巴，露出下面的亮点，向同伴发出警报。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,动物的尾巴,蝎子的尾巴是用来攻击敌人的。,兔子的短尾巴可以在紧急情况下帮助兔子逃命。当兔子被猛兽咬住时，兔子立刻使用“脱皮计”，将尾巴的“皮套”脱下，从而赢得逃命的时间。,.,拓展延伸,神奇的尾巴松鼠的尾巴长又大，盖在身上真暖和。鳄鱼的尾巴长又硬，遇到危险当武器。鸟儿的尾巴长又宽，掌握方向它最棒。猴子的尾巴像钩子，挂在树上不怕掉！,参考答案：小壁虎分别向小鱼、老牛、燕子借尾巴，结果都没有借到，最后自己长出了一条新尾巴。,choxishngz一、抄写生字。,河,姐,借,呢,河,姐,借,呢,呀,哪,呀,哪,随堂练习,1.选字填空（只填序号）。,吗呢哪啦,向谁去借一条尾巴_？把你的橡皮借给我用一下可以_？我长出一条新尾巴_！没有尾巴多难看_！,2.根据课文内容填空。,小壁虎爬到_，找_借尾巴，_要用尾巴_；爬到_，找_借尾巴，_要用尾巴_；爬到_，找_借尾巴，_要用尾巴_；最后小壁虎的尾巴_。,小河边,小鱼,拨水,大树上,老牛,赶蝇子,房檐下,燕子,掌握方向,长出来了,小鱼,老牛,燕子,bynjibchngwnzhng二、把音节补充完整。虎h_蚊w_逃t_蛇_,n,o,sh,zhoyngzitinkng三、照样子填空。小鱼（游）来（游）去壁虎（）来（）去燕子（）来（）去,爬,爬,飞,飞,.,【我会连】小鸟在树上跑来跑去。小鸭在水里飞来飞去。小狗在地上跳来跳去。燕子在空中游来游去。【我会填】（）来（）去（）来（）去,10分钟巩固练习,.,小鱼()着尾巴()。老黄牛()着尾巴()。燕子()着尾巴(）。,摇,拨水,甩,赶蝇子,摆,掌握方向,挣断,保护自己,小壁虎()尾巴()。,动物的尾巴各有各的用处,挣断（zhndu