Unit 5 Lesson 29 DNA The Story of You 课件 2025-2026学年冀教版（2012）九年级英语全册

该初中英语课件聚焦“DNA—生命的蓝图”，通过“Think about it”问题导入，引导学生联系已知思考DNA作用，再以新词汇（如blueprint, complex）和短语（in general, be related to）为支架，衔接听力找新词、阅读析例句及语法对比等内容，构建知识脉络。 其亮点在于融合科学主题与语言学习，通过建筑蓝图类比DNA帮助理解，对比except与except for用法培养思维品质，结合听力阅读训练提升语言能力。学生能在语境中掌握词汇语法，教师可借助结构化资料高效教学，促进语言与思维协同发展。

Lesson29 DNA-The Story of You Unit 5 Look into Science 2 Lead-in Lead-in Think about it 1.What do you know about DNA? 2.What can scientist do with DNA? New words This is the shape of DNA. Do you think it’s magic? “DNA” is short for deoxyribonucleic acid. [diˌɑksiˌraɪboʊnuˈkleɪɪk ˈæsɪd] 4 Words and expressions DNA 脱氧核糖核酸 blueprint /ˈbluːprɪnt/ n.蓝图 general /ˈdʒenərəl/ adj.一般的，普通的 complex /ˈkɒmpleks/ adj.复杂的 twin /twɪn/ n.双胞胎之一 twins repeat /rɪˈpiːt/ v. 重复，复述 ，背诵 pattern /ˈpætn/ n. 模式，形式 identify /aɪˈdentɪfaɪ/ v.确认，鉴别 related /rɪˈleɪtɪd/ adj. 有关的，相关的 grandson /ˈɡrænsʌn/ n.孙子，外孙 granddaughter /ˈɡrændɔːtə/ n. 孙女，外孙女 instruction /ɪnˈstrʌkʃn/ n.指示，说明 一般而言；通常 除了……以外 寻找 在未来 与某人有关 不仅……而且…… 数十亿计的 数百万计的 in general except for… look for in the future be related to sb. not only… but also… billions of millions of Main phrases 6 Presentation Listen to the tape and find out the new words and phrases in the text. Listening When you build a house，you use a blueprint. What’s a blueprint？In general，a blueprint is a drawing that shows how to put a house together with many different parts. DNA is the blueprint of life. But building a living thing is far more complex than building a house. It takes millions of years for nature to change the DNA in living things to make them fit the world they live in. How tall are you？What colour are your eyes？What size are your feet? All these things are strongly influenced by your DNA before you are born! generally adv.一般地，广泛地 generally speaking 大体而言 be different from 与...不同 be different in 在某方面不同 一般而言，通常 far 非常，远远 even 甚至 rather 相当 +比较级 much 很多 a little/bit 有点 a lot 很多 v. 影响，对....有影响 be influenced by 受...的影响 influence sb. to do sth. 影响某人做某事 n.影响 have an influence on... 对......有影响 Reading DNA is fantastic! ·Except for some twins, every living thing has its own unique DNA. ·Some health problems can be caused by problems in your DNA. Scientists can look for these problems and，sometimes，help you before you become sick. In the future，scientists might be able to change your DNA. one’s own 某人自己的 health n. 健康 healthy adj. 健康的 stay/keep healthy保持健康 healthily adv. 健康地 eat healthily 吃得健康 unhealthy 不健康的 be able to do sth. 有能力做某事 be unable to do sth.不能做某事 除了 every +名词单数 ，谓语用单数 （不能与of连用，指三者或以上的每一个） each+名词单数 谓语用单数 （可与of连用，指两者或以上中的每一个） except 除了。强调“不在其中”，指从同类事物的总体中除去一部分。（不包括后者） except for 表示对主要部分的肯定以及对局部的否定（不包括后者）。 besides 强调“除了……之外(还有)”，后接名词、代词或动名词，但不能接从句。（包括后者） but 除了。强调“不在其中”，与except 可互换使用，但but多与all, everyone, everything, no one, nobody, nothing 等连用。 Everybody_______John was able to answer. 除了约翰外大家都能回答。 He is a good man_________ a bad temper. 除了他的坏脾气，他是个好人。 I have another blue pen _______ this one. 除了这支外，我还有一支蓝色钢笔。 There is nothing ____a desk in the room. 房间里除了一张桌子什么都没有。 except except for but besides ·There are copies of your DNA in every part of your body. For example，your finger has the same DNA as your hair. ·You have your own unique DNA，but it repeats patterns from your parents’ DNA. From your DNA，scientists can identify not only you，but also people who are related to you. Your parents and grandparents are related to you，and you have their DNA. When you have a grandson or granddaughter，he or she will have your DNA. Your DNA has billions of instructions that explain why you are the way you are. It’s one of the most amazing things on the earth! 与...相关 instruction /ɪnˈstrʌkʃn/ n.指示；说明 follow the/one’s instruction 按说明操作 26 Homework Homework 1.Finish off the remaining exercises in the activity book. 2.Preview the next lesson in the student’s book. $