DNA-The-Story-of-YouLook-into-Science!-省公开课一等奖新名师优.pptx

DNAThe Story of You Lesson 29 Look into Science Unit 5第1页课文课文展现展现知识知识讲解讲解 Lesson 29 DNAThe Story of You 词词汇汇听听写写课课堂堂导导入入课课文文1课课后后作作业业课课堂堂小小结结课课堂堂练练习习第2页 同学们，上一课学习单词你们都掌握了吗？现在大同学们，上一课学习单词你们都掌握了吗？现在大家来检验一下，点击下面音频开始听写吧！家来检验一下，点击下面音频开始听写吧！第3页What do you know about DNA?第4页THINK ABOUT ITTHINK ABOUT ITWhat do you know about DNA?What can scientists do with DNA?When you build a house，you use a blueprint.Whats 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.第5页 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!DNA is fantastic!Except for some twins，every living thing has its own unique DNA.第6页 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.There are copies of your DNA in every part of your body.For example，your finger has the same DNA asyour hair.第7页 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.Its one of the most amazing things on the earth!第8页This is the shape of DNA.Do you think its magic?Your DNA comes from your parents.第9页 do with 处理处理 考向do with与与deal with都可表示都可表示“处理处理”。do with常与常与what连用，而连用，而deal with常与常与how连用。连用。eg：I dont know what they do with the problem.我不知道他们怎样处理这个问题。讲解来自讲解来自点拨点拨知识点1 1第10页 in general 通常；大致上通常；大致上考向generally adv.普通地；广泛地；普遍地。普通地；广泛地；普遍地。generally speaking“大致而言；概括来说大致而言；概括来说”。eg：Generally speaking，your idea is right.总来说，你想法是正确。讲解来自讲解来自点拨点拨知识点2 2eg：In general，their cars are very reliable.通常，他们小汽车是很可靠。第11页典例典例_，it is not very bad to work in this factory.AGeneral speak BSpeaking generallyCIn general DIn generally【点拨点拨】句意：通常来说，在这家工厂工作还是不错。句意：通常来说，在这家工厂工作还是不错。In general通常来说。故选通常来说。故选C。C讲解来自讲解来自点拨点拨第12页 开门见山法：此句是一个主旨句，整个段落开门见山法：此句是一个主旨句，整个段落围绕围绕DNA写作，接下来整个文章都是围绕其写作。写作，接下来整个文章都是围绕其写作。讲解来自讲解来自点拨点拨知识点3 3第13页except for 除除之外之外 讲解来自讲解来自点拨点拨知识点4 4eg：Your article is quite good except for several spelling mistakes.除了几处拼写错误，你文章很好。第14页except 意为“除了”，表示从整体中除去，不包含所除事物在内，除去和非除去是同类事物。普通不用于句首。except for 意为“除了”，说明整个基本情况后，对细节加以纠正，其后普通接名词或名词性短语。besides 意为“除了之外还有”，包含所“除”事物在内。but 意为“除外”，多用在no，nobody，who，where，all等词之后。讲解来自讲解来自点拨点拨考向辨析辨析 except，except for，besides与与but 第15页eg：Everybody except John was able to answer.除了约翰外大家都能回答。He is a good man except for a bad temper.除了他坏脾气，他是个好人。I have another blue pen besides this one.除了这支外，我还有一支蓝色钢笔。They all have gone but me.除了我他们都去了。讲解来自讲解来自点拨点拨第16页典例典例 1 1Is Jack good at basketball?Yes.He is also good at table tennis _basketball.Aexcept BbesidesCbut Dbeside【点拨点拨】except表示表示“除了除了”，不包含所除事物在内；，不包含所除事物在内；besides表示表示“除除之外还有之外还有”，包含所除事物在内；，包含所除事物在内；but“除除外外”，但惯用在，但惯用在no，nobody等词之后；等词之后；beside表示表示“在在旁边旁边”。依据句意。依据句意“杰克擅长篮杰克擅长篮球吗？球吗？是。除了篮球外他也擅长乒乓球。是。除了篮球外他也擅长乒乓球。”可知可知Jack既擅长篮球也擅长乒乓球。故选既擅长篮球也擅长乒乓球。故选B。B讲解来自讲解来自点拨点拨第17页典例典例 2 2 Bens composition is almost perfect _ several spelling mistakes.AbesidesBexcept forCbut Dbeside【点拨点拨】句意：除了几处拼写错误之外，本作文几乎是句意：除了几处拼写错误之外，本作文几乎是 完美。前面是对整体情况说明，后面再对细节上进完美。前面是对整体情况说明，后面再对细节上进 行修正。故选行修正。故选B。B讲解来自讲解来自点拨点拨第18页 sometimes/smtamz/adv.有时，时而有时，时而考向【易错点易错点】讲解来自讲解来自点拨点拨知识点5 5eg：I sometimes walk to school.我有时步行去上学。辨析辨析 sometimes，sometime，some time与与some times 第19页sometimes 意为“有时”，惯用于普通现在时，放于句首、句中、句尾均可。He sometimes watches TV.他有时候看电视。sometime 意为“在某时”，惯用于普通未来时或普经过去时中，表示不确定某个时间。I hope to visit the Great Wall sometime.我希望某个时候去参观长城。some time 意为“一段时间”，常与for连用。We will stay in this city for some time.我们将会在这个城市呆一段时间。some times 意为“几次”，time在此为可数名词，意为“次”。My father has been to Beijing some times.我父亲去过北京几次了。讲解来自讲解来自点拨点拨第20页典例典例He said he would come to see us_ the next day.Asometime Bsometimes Csome times【点拨点拨】sometime在某时；在某时；sometimes有时；有时；some times 几次。由句意可知应选几次。由句意可知应选A。A讲解来自讲解来自点拨点拨第21页 the sameas 和和一样一样 考向一讲解来自讲解来自点拨点拨知识点6 6eg：She wears the same clothes as her sister.她穿着同她妹妹一样衣服。same常与定冠词常与定冠词the连用。连用。be the same.as反义短语反义短语be different from.“与与不一样不一样”。eg：They are the same age as us.他们和我们同岁。The English book is different from yours.这本英语书与你那一本不一样。第22页all the same虽是这么；尽管如此虽是这么；尽管如此eg：He gives me a lot of trouble，but I like him all the same.他给我添了许多麻烦，但我还是喜欢他。考向二讲解来自讲解来自点拨点拨第23页 not only.but also.不但不但而且而且 考向一讲解来自讲解来自点拨点拨知识点7 7not only.but also.用于连接两个并列成份，用于连接两个并列成份，着重强调后者。着重强调后者。eg：Not only Ma Lin but also Ma Long plays pingpong very well.不但马琳而且马龙乒乓球打得也很好。(连接两个并列主语)第24页not only.but also.连接两个并列主语时，谓语动连接两个并列主语时，谓语动词要与它最近主语保持人称和数上一致，即词要与它最近主语保持人称和数上一致，即“就就近标准近标准”。eg：Not only the boy but also his parents are staring at the screen.不但那个男孩而且他父母也正 在盯着屏幕。考向二讲解来自讲解来自点拨点拨第25页典例典例To achieve a bright future，we should _ study hard _ keep in good health.I agree with you.(云南)Anot;but Bnot only;but alsoCneither;nor Deither;or【点拨点拨】为了实现光明未来，我们不但应该努力学习，为了实现光明未来，我们不但应该努力学习，而且应该保持身体健康。而且应该保持身体健康。我同意你观点。我同意你观点。notbut 表示表示“不是不是而是而是”；not onlybut also表示表示“不但不但而且而且”；neither.nor 表示表示“二者都二者都 不不”；either.or 表示表示“或者或者或者或者”。故选。故选B。B讲解来自讲解来自点拨点拨第26页 one of 之一之一 考向【重点重点】讲解来自讲解来自点拨点拨知识点8 8 one of 意为意为“之一之一”，后接，后接 可数名词复数作主语时，谓语动词用单数。可数名词复数作主语时，谓语动词用单数。如有形容词修饰如有形容词修饰one of后名词时，形容词后名词时，形容词 普通用最高级形式，最高级前应有定冠词普通用最高级形式，最高级前应有定冠词the 或形容词性物主代词。或形容词性物主代词。第27页eg：He is one of my best friends.他是我最好朋友之一。One of my friends lives in Beijing.我一个朋友住在北京。讲解来自讲解来自点拨点拨第28页典例典例Chiang Mai(清迈)has been one of _tourist places for Chinese since the movie Lost in Thailand(泰囧)was shown.(山东东营)Ahot BhotterChottest Dthe hottest【点拨点拨】考查考查“one ofthe形容词最高级名词复数形容词最高级名词复数”使用方法，意为使用方法，意为“最最之一之一”，故选，故选D。D讲解来自讲解来自点拨点拨第29页by/ba/prep.经过经过 考向讲解来自讲解来自点拨点拨知识点9 9eg：I learn English by listening to the radio.我经过听收音机学习英语。by意为意为“用来；靠；经过用来；靠；经过”，表示方式或路径。，表示方式或路径。eg：They make their living by selling fish.他们以卖鱼为生。第30页典例典例You can improve your English _ practicing more.(重庆A)AbyBwithCof Din【点拨点拨】本题考查介词使用方法。本题考查介词使用方法。by表示方式，表示方式，“经过经过”；with“用；和用；和在一起在一起”；of“关于；属于关于；属于”；in“在在里里”。由句意。由句意“你能够经过多练习提升你英语。你能够经过多练习提升你英语。”可知，可知，by表示方式，符合题意。表示方式，符合题意。A讲解来自讲解来自点拨点拨第31页1.Read the lesson and answer the questions.1What is a blueprint?2Which is more complex，building a living thing or building a house?3Do some twins have the same DNA?Lets Do It!A blueprint is a drawing that shows how to put a house together with many different parts.Building a living thing.Yes,they do.第32页4Is it possible to change your DNA?5Whose DNA is related to yours?Yes.In the future,scientists might be able to change our DNA.My parents and my grandparents.第33页2.Fill in the blanks with the phrases in the box.in generalexcept fornot onlybut also related to even ifthe sameasLets Do It!1Your homework is quite good _a few spelling mistakes.2_the young _the old like pop music.3Kates hair is_ colour _her sisters.4_，women live longer than men.5_ many difficulties remain,we can overcome them.6Is wealth _ happiness?except for Not onlythe sameIn general Even if related to but also as 第34页3.Complete the passage with the sentences in the box.Changing DNA Do you know DNA can be changed?Have you ever seen a pig with a dogs body?Of course not!Pigs and dogs cant have babies together._But now，scientists can do it.Scientists can take DNA,from one kind of animal and put it into another kind of animal.They can design new plants ALets Do It!第35页By combining the DNA of other plants._ Some scientists are worried.They say we need to know more about DNA before we start changing it._ But what if the plants are bad for humans，too?C B ATheir DNA cant combine.BWe can make plants that are bad for pests.CThey can even combine the DNA of a plant and an animal.第36页4.Is it a good idea to change the DNA of the food we eat?Some people say doing this makes our food better.Others think its too dangerous.Search the Internet for information and write down your ideas.Lets Do It!第37页一、依据句意及首字母提醒完成单词一、依据句意及首字母提醒完成单词 1Lucy and Lily are _They look the same.2In _，women do it more easily than men.3.Its important for you to _the text.4Mike has a granddaughter and a _ 5Before you take this medicine,you must read the _.来自来自点拨训练点拨训练tgeneral wins repeat grandson nstructionsi第38页来自来自点拨训练点拨训练二、单项选择二、单项选择6What did the police _ that accident?Adeal in Bdeal with Cdo with Ddo about 7My article is good _some spelling mistakes.Aexcept Bexcept for CBeside Dbesides CB第39页来自来自点拨训练点拨训练8From your DNA，scientists can identify you and the people _to you.Arelated Brelates Crelating Drelate9(中考六盘水)Not only you but also he _ the secret.Aknows Bknow Chave known Dto knowAA第40页来自来自点拨训练点拨训练10(中考龙东)Jack,your room is dirty.It should _ right away.Sorry,Ill do it right now.Abe cleanedBbe cleaningCcleanedA三、依据汉语意思完成句子三、依据汉语意思完成句子11他和我家有亲戚关系。He _ _ _ my family.12凯特和她姐姐有一样颜色头发。Kate has _ _colour of hair _her sister.the same asis related to 第41页来自来自点拨训练点拨训练13.数十亿年前，地球只是一团尘埃。_ _years ago,the earth was just a cloud of dust.14他话对她有很大影响。She was _ _ by his words.15(中考盐城)李明不但聪明而且勤奋。Li Ming is_ _ _ _ _ _strongly influenced Billions of not only clever but also hardworking 第42页 本节课主要学习了以下重点内容本节课主要学习了以下重点内容:（1 1）重点单词：）重点单词：sometimes,by等。等。（2 2）重点短语：）重点短语：do with,in general,except for,the same as,not onlybut also,one of等。等。第43页1.熟记本课时词汇熟记本课时词汇 2.完成本课时课后作业完成本课时课后作业课后作业课后作业第44页