小壁虎借尾巴.ppt

1、,17.小壁虎,借,尾巴,1,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),b h 壁 虎,4,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.,17.小壁虎,借,尾巴,6,1、小壁虎为什么借尾巴

2、？ 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，

3、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,

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6、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,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,16,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

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9、 xn wi ba 一 条 蛇 新 尾 巴 b shu zhng w to zu nn gu 拨 水 掌 握 逃 走 难 过 wn zi ji jie shui zhe yng zi 蚊 子 姐 姐 甩 着 蝇 子,我会读,20,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,21,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

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12、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,小壁虎为什么去借尾巴？,26,小壁虎为什么要借尾巴？,没有尾巴多难看哪!小壁虎想，向谁去借一条尾巴呢？,28,小壁虎向谁借尾巴了？,29,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

13、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。”,

14、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（sh hi zi） 转身（zhun shn）,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

15、？,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

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17、成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,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

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20、状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,

21、状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,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

22、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）

23、,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

24、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

25、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

26、路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才

27、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。,朗读课文。说说壁虎都找谁借过尾巴，结果怎么样？,cho xi shng z 一、抄 写 生 字。,河,姐,借,呢,河,姐,借,呢,呀,哪,呀,哪

28、,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,b yn ji b chng wn zhng 二、把 音 节 补 充 完 整。 虎h_ 蚊w_ 逃t_ 蛇_,n,o,sh,zho yng zi tin kng 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（zhn